The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-1759 advisory.

    - Limit recursion in ri-records (CVE-2021-3622)       resolves: rhbz#1976194
    - Fixes: CVE-2021-33285, CVE-2021-33286, CVE-2021-33287, CVE-2021-33289,       CVE-2021-35266, CVE-2021-35267, CVE-2021-35268, CVE-2021-35269,       CVE-2021-39251, CVE-2021-39252, CVE-2021-39253, CVE-2021-39254       resolves: rhbz#2004490

    libnbd
    - Fix CVE-2022-0485: Fail nbdcopy if NBD read or write fails       resolves: rhbz#2045718
    - Resolves: bz#2046198       (CVE-2022-0358 virt:av/qemu-kvm: QEMU: virtiofsd: potential privilege escalation via CVE-2018-13405     [rhel-8.6])
    - Resolves: bz#2036580       (CVE-2021-4158 virt:rhel/qemu-kvm: QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c     [rhel-8])

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of AHV installed on the remote host is prior to 20230302.102005. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20230302.100173 advisory.

  - A crafted NTFS image can trigger a heap-based buffer overflow, caused by an unsanitized attribute in     ntfs_get_attribute_value, in NTFS-3G < 2021.8.22. (CVE-2021-39263)

  - EDK2's Network Package is susceptible to a buffer overflow vulnerability when processing DNS Servers     option from a DHCPv6 Advertise message. This vulnerability can be exploited by an attacker to gain     unauthorized access and potentially lead to a loss of Confidentiality, Integrity and/or Availability.
    (CVE-2023-45234)

  - A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may     allow an authenticated client to cause a denial of service. (CVE-2023-1667)

  - A vulnerability was found in libssh, where the authentication check of the connecting client can be     bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen     if there is insufficient memory or the memory usage is limited. The problem is caused by the return value     `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call     `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the     cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.
    (CVE-2023-2283)

  - A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange     differ from response times of ciphertexts with correct PKCS#1 v1.5 padding. (CVE-2023-5981)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2022-3705:01 advisory.

    * QEMU: virtio-net: heap use-after-free in virtio_net_receive_rcu     (CVE-2021-3748)
      * ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due     to incorrect check of bytes_in_use value in MFT records (CVE-2021-33285)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode     string (CVE-2021-33286)
      * ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially     crafted NTFS attributes (CVE-2021-33287)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section     (CVE-2021-33289)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode     pathname (CVE-2021-35266)
      * ntfs-3g: Stack buffer overflow triggered when correcting differences between     MFT and MFTMirror sections (CVE-2021-35267)
      * ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a     specially crafted NTFS inode (CVE-2021-35268)
      * ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a     specially crafted NTFS attribute from MFT (CVE-2021-35269)
      * ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open()     (CVE-2021-39251)
      * ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)
      * ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)
      * ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in     ntfs_attr_record_resize() (CVE-2021-39254)
      * ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an     invalid attribute (CVE-2021-39255)
      * ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name()     (CVE-2021-39256)
      * ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an     unallocated bitmap (CVE-2021-39257)
      * ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and     ntfs_external_attr_find() (CVE-2021-39258)
      * ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an     unsanitized attribute length (CVE-2021-39259)
      * ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information()     (CVE-2021-39260)
      * ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)
      * ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)
      * ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an     unsanitized attribute (CVE-2021-39263)
      * libnbd: nbdcopy: missing error handling may create corrupted destination     image (CVE-2022-0485)
      * hivex: stack overflow due to recursive call of _get_children()     (CVE-2021-3622)
      * nbdkit: NBD_OPT_STRUCTURED_REPLY injection on STARTTLS (CVE-2021-3716)
      * libvirt: segmentation fault during VM shutdown can lead to vdsm hang     (CVE-2021-3975)
      * QEMU: NULL pointer dereference in mirror_wait_on_conflicts() in     block/mirror.c (CVE-2021-4145)
      * QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c     (CVE-2021-4158)
      * QEMU: block: fdc: null pointer dereference may lead to guest crash     (CVE-2021-20196)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2022-3568:01 advisory.

    * QEMU: virtio-net: heap use-after-free in virtio_net_receive_rcu     (CVE-2021-3748)
      * ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due     to incorrect check of bytes_in_use value in MFT records (CVE-2021-33285)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode     string (CVE-2021-33286)
      * ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially     crafted NTFS attributes (CVE-2021-33287)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section     (CVE-2021-33289)
      * ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode     pathname (CVE-2021-35266)
      * ntfs-3g: Stack buffer overflow triggered when correcting differences between     MFT and MFTMirror sections (CVE-2021-35267)
      * ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a     specially crafted NTFS inode (CVE-2021-35268)
      * ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a     specially crafted NTFS attribute from MFT (CVE-2021-35269)
      * ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open()     (CVE-2021-39251)
      * ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)
      * ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)
      * ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in     ntfs_attr_record_resize() (CVE-2021-39254)
      * ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an     invalid attribute (CVE-2021-39255)
      * ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name()     (CVE-2021-39256)
      * ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an     unallocated bitmap (CVE-2021-39257)
      * ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and     ntfs_external_attr_find() (CVE-2021-39258)
      * ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an     unsanitized attribute length (CVE-2021-39259)
      * ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information()     (CVE-2021-39260)
      * ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)
      * ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)
      * ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an     unsanitized attribute (CVE-2021-39263)
      * libnbd: nbdcopy: missing error handling may create corrupted destination     image (CVE-2022-0485)
      * hivex: stack overflow due to recursive call of _get_children()     (CVE-2021-3622)
      * nbdkit: NBD_OPT_STRUCTURED_REPLY injection on STARTTLS (CVE-2021-3716)
      * libvirt: segmentation fault during VM shutdown can lead to vdsm hang     (CVE-2021-3975)
      * QEMU: NULL pointer dereference in mirror_wait_on_conflicts() in     block/mirror.c (CVE-2021-4145)
      * QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c     (CVE-2021-4158)
      * QEMU: block: fdc: null pointer dereference may lead to guest crash     (CVE-2021-20196)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the qemu package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions     prior to 6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest due to     improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount     of memory, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2021-3607)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to     6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest and may result in a     crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest     threat from this vulnerability is to system availability. (CVE-2021-3608)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

  - A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0.
    The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A     malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host     when writing data reaches the threshold of mirroring node. (CVE-2021-4145)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is affected by the vulnerability described in GLSA-202208-27 (QEMU: Multiple Vulnerabilities)

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This     occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or     process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or     potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.
    (CVE-2020-15863)

  - In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects     the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the     QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in     hw/net/net_tx_pkt.c. (CVE-2020-16092)

  - A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0.
    This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of     service. The highest threat from this vulnerability is to system availability. (CVE-2020-35504)

  - A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in     versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw     allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.
    The highest threat from this vulnerability is to system availability. (CVE-2020-35505)

  - A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in     versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows     a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or     potential code execution with the privileges of the QEMU process. (CVE-2020-35506)

  - A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system     daemon where a privileged guest user is able to create a device special file in the shared directory and     use it to r/w access host devices. (CVE-2020-35517)

  - An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It     may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A     privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
    (CVE-2021-20203)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

  - A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option     may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a     modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a     malicious user to elevate their privileges within the guest. (CVE-2021-20263)

  - The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to     the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This     flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of     service or potential code execution. QEMU up to (including) 5.2.0 is affected by this. (CVE-2021-3409)

  - A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions     up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get     bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the     host resulting in DoS scenario. (CVE-2021-3416)

  - A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a     single, large transfer request, to reduce the overhead and improve performance. The combined size of the     bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper     validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the     array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a     denial of service. (CVE-2021-3527)

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions     up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-     gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-     user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit     this issue to leak memory from the host. (CVE-2021-3545)

  - An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET'     command from the guest. It could allow a privileged guest user to crash the QEMU process on the host,     resulting in a denial of service condition, or potential code execution with the privileges of the QEMU     process. (CVE-2021-3546)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while     handling a PVRDMA_CMD_CREATE_MR command due to improper memory remapping (mremap). This flaw allows a     malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to     system availability. (CVE-2021-3582)

  - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions     prior to 6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest due to     improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount     of memory, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2021-3607)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to     6.1.0. The issue occurs while handling a PVRDMA_REG_DSRHIGH write from the guest and may result in a     crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest     threat from this vulnerability is to system availability. (CVE-2021-3608)

  - A stack overflow vulnerability was found in the Intel HD Audio device (intel-hda) of QEMU. A malicious     guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service     condition. The highest threat from this vulnerability is to system availability. This flaw affects QEMU     versions prior to 7.0.0. (CVE-2021-3611)

  - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs     when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A     malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,     resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the     host. (CVE-2021-3682)

  - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions     prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-     bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this     flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the     host. (CVE-2021-3713)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

  - A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the     Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be     written to the controller's registers and trigger undesirable actions (such as reset) while the device is     still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could     use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or     potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects     QEMU versions before 7.0.0. (CVE-2021-3750)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

  - A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist()     where a malicious guest controlling certain input can read out of bounds memory. A malicious user could     use this flaw leading to disclosure of sensitive information. (CVE-2021-3947)

  - A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0.
    The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A     malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host     when writing data reaches the threshold of mirroring node. (CVE-2021-4145)

  - A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc()     function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer     overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or     potentially execute arbitrary code within the context of the QEMU process. (CVE-2021-4206)

  - A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values     `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object     followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw     to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU     process. (CVE-2021-4207)

  - A flaw was found in the virtio-net device of QEMU. This flaw was inadvertently introduced with the fix for     CVE-2021-3748, which forgot to unmap the cached virtqueue elements on error, leading to memory leakage and     other unexpected results. Affected QEMU version: 6.2.0. (CVE-2022-26353)

  - A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached     from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.
    Affected QEMU versions <= 6.2.0. (CVE-2022-26354)

  -  Please review the referenced CVE identifiers for details.  (CVE-2021-3929)

  - QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c (CVE-2021-4158)

  - QEMU: virtiofsd: potential privilege escalation via CVE-2018-13405 (CVE-2022-0358)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of AHV installed on the remote host is prior to 10.0. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-10.0 advisory.

  - A crafted NTFS image can trigger a heap-based buffer overflow, caused by an unsanitized attribute in     ntfs_get_attribute_value, in NTFS-3G < 2021.8.22. (CVE-2021-39263)

  - An issue was discovered in libexpat before 2.6.3. nextScaffoldPart in xmlparse.c can have an integer     overflow for m_groupSize on 32-bit platforms (where UINT_MAX equals SIZE_MAX). (CVE-2024-45492)

  - Buffer Overflow vulnerability found in SQLite3 v.3.27.1 and before allows a local attacker to cause a     denial of service via a crafted script. (CVE-2020-24736)

  - Flatpak is a Linux application sandboxing and distribution framework. Prior to versions 1.14.0 and     1.15.10, a malicious or compromised Flatpak app using persistent directories could access and write files     outside of what it would otherwise have access to, which is an attack on integrity and confidentiality.
    When `persistent=subdir` is used in the application permissions (represented as `--persist=subdir` in the     command-line interface), that means that an application which otherwise doesn't have access to the real     user home directory will see an empty home directory with a writeable subdirectory `subdir`. Behind the     scenes, this directory is actually a bind mount and the data is stored in the per-application directory as     `~/.var/app/$APPID/subdir`. This allows existing apps that are not aware of the per-application directory     to still work as intended without general home directory access. However, the application does have write     access to the application directory `~/.var/app/$APPID` where this directory is stored. If the source     directory for the `persistent`/`--persist` option is replaced by a symlink, then the next time the     application is started, the bind mount will follow the symlink and mount whatever it points to into the     sandbox. Partial protection against this vulnerability can be provided by patching Flatpak using the     patches in commits ceec2ffc and 98f79773. However, this leaves a race condition that could be exploited by     two instances of a malicious app running in parallel. Closing the race condition requires updating or     patching the version of bubblewrap that is used by Flatpak to add the new `--bind-fd` option using the     patch and then patching Flatpak to use it. If Flatpak has been configured at build-time with     `-Dsystem_bubblewrap=bwrap` (1.15.x) or `--with-system-bubblewrap=bwrap` (1.14.x or older), or a similar     option, then the version of bubblewrap that needs to be patched is a system copy that is distributed     separately, typically `/usr/bin/bwrap`. This configuration is the one that is typically used in Linux     distributions. If Flatpak has been configured at build-time with `-Dsystem_bubblewrap=` (1.15.x) or with     `--without-system-bubblewrap` (1.14.x or older), then it is the bundled version of bubblewrap that is     included with Flatpak that must be patched. This is typically installed as `/usr/libexec/flatpak-bwrap`.
    This configuration is the default when building from source code. For the 1.14.x stable branch, these     changes are included in Flatpak 1.14.10. The bundled version of bubblewrap included in this release has     been updated to 0.6.3. For the 1.15.x development branch, these changes are included in Flatpak 1.15.10.
    The bundled version of bubblewrap in this release is a Meson wrap subproject, which has been updated to     0.10.0. The 1.12.x and 1.10.x branches will not be updated for this vulnerability. Long-term support OS     distributions should backport the individual changes into their versions of Flatpak and bubblewrap, or     update to newer versions if their stability policy allows it. As a workaround, avoid using applications     using the `persistent` (`--persist`) permission. (CVE-2024-42472)

  - Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote     attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the     KeyTrap issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the     protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG     records. (CVE-2023-50387)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the qemu package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the     ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A     malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.
    (CVE-2019-20808)

  - An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing     transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid     values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The     highest threat from this vulnerability is to system availability. (CVE-2021-20257)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while     handling a 'PVRDMA_CMD_CREATE_MR' command due to improper memory remapping (mremap). This flaw allows a     malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to     system availability. (CVE-2021-3582)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions     prior to 6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest due to     improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount     of memory, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2021-3607)

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to     6.1.0. The issue occurs while handling a 'PVRDMA_REG_DSRHIGH' write from the guest and may result in a     crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest     threat from this vulnerability is to system availability. (CVE-2021-3608)

  - A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the     descriptor's address belongs to the non direct access region, due to num_buffers being set after the     virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a     denial of service condition, or potentially execute code on the host with the privileges of the QEMU     process. (CVE-2021-3748)

  - An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE     SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious     guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
    (CVE-2021-3930)

  - A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0.
    The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A     malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host     when writing data reaches the threshold of mirroring node. (CVE-2021-4145)

  - A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached     from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results.
    Affected QEMU versions <= 6.2.0. (CVE-2022-26354)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of AHV installed on the remote host is prior to 20230302.102005. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20230302.101026 advisory.

  - A crafted NTFS image can trigger a heap-based buffer overflow, caused by an unsanitized attribute in     ntfs_get_attribute_value, in NTFS-3G < 2021.8.22. (CVE-2021-39263)

  - EDK2's Network Package is susceptible to a buffer overflow vulnerability when processing DNS Servers     option from a DHCPv6 Advertise message. This vulnerability can be exploited by an attacker to gain     unauthorized access and potentially lead to a loss of Confidentiality, Integrity and/or Availability.
    (CVE-2023-45234)

  - Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote     attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the     KeyTrap issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the     protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG     records. (CVE-2023-50387)

  - The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped)     allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC     responses in a random subdomain attack, aka the NSEC3 issue. The RFC 5155 specification implies that an     algorithm must perform thousands of iterations of a hash function in certain situations. (CVE-2023-50868)

  - close_altfile in filename.c in less before 606 omits shell_quote calls for LESSCLOSE. (CVE-2022-48624)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
161302	Oracle Linux 8 : virt:ol / and / virt-devel:ol (ELSA-2022-1759)	Nessus	Oracle Linux Local Security Checks	2022/5/18	2024/11/1	high
206823	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20230302.100173)	Nessus	Misc.	2024/9/9	2025/2/17	low
293675	MiracleLinux 8 : virt:rhel and virt-devel:rhel (AXSA:2022-3705:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/2/4	high
293950	MiracleLinux 8 : virt:rhel (AXSA:2022-3568:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/2/4	high
160605	EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2022-1621)	Nessus	Huawei Local Security Checks	2022/5/5	2022/12/15	medium
164115	GLSA-202208-27 : QEMU: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	2022/8/15	2023/10/16	high
310786	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-10.0)	Nessus	Misc.	2026/4/29	2026/8/13	medium
163161	EulerOS Virtualization 2.10.0 : qemu (EulerOS-SA-2022-2043)	Nessus	Huawei Local Security Checks	2022/7/14	2023/10/18	high
163175	EulerOS Virtualization 2.10.1 : qemu (EulerOS-SA-2022-2071)	Nessus	Huawei Local Security Checks	2022/7/14	2023/10/18	high
206824	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20230302.101026)	Nessus	Misc.	2024/9/9	2025/10/6	medium

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