The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4713 advisory.

    - Document CVEs as fixed: CVE-2017-9524, CVE-2017-6058, CVE-2017-5931 (Mark Kanda)  [Orabug: 29886908]     {CVE-2017-5931} {CVE-2017-6058} {CVE-2017-9524}
    - pvrdma: release device resources in case of an error (Prasad J Pandit)  [Orabug: 29056678]     {CVE-2018-20123}
    - qxl: check release info object (Prasad J Pandit)  [Orabug: 29886906]  {CVE-2019-12155}
    - target/i386: add MDS-NO feature (Paolo Bonzini)  [Orabug: 29820428]  {CVE-2018-12126} {CVE-2018-12127}     {CVE-2018-12130} {CVE-2019-11091}
    - docs: recommend use of md-clear feature on all Intel CPUs (Daniel P. Berrange)  [Orabug: 29820428]     {CVE-2018-12126} {CVE-2018-12127} {CVE-2018-12130} {CVE-2019-11091}
    - target/i386: define md-clear bit (Paolo Bonzini)  [Orabug: 29820428]  {CVE-2018-12126} {CVE-2018-12127}     {CVE-2018-12130} {CVE-2019-11091}

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.

Multiple vulnerabilities were found in qemu, a fast processor emulator :

  - CVE-2017-9524     Denial of service in qemu-nbd server

  - CVE-2017-10806     Buffer overflow in USB redirector

  - CVE-2017-11334     Out-of-band memory access in DMA operations

  - CVE-2017-11434     Out-of-band memory access in SLIRP/DHCP

According to the version of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - The qemu-nbd server in QEMU (aka Quick Emulator), when     built with the Network Block Device (NBD) Server     support, allows remote attackers to cause a denial of     service (segmentation fault and server crash) by     leveraging failure to ensure that all initialization     occurs before talking to a client in the nbd_negotiate     function.(CVE-2017-9524)

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.

This update for qemu fixes several issues. These security issues were fixed :

  - CVE-2017-15268: Qemu allowed remote attackers to cause a     memory leak by triggering slow data-channel read     operations, related to io/channel-websock.c     (bsc#1062942).

  - CVE-2017-9524: The qemu-nbd server when built with the     Network Block Device (NBD) Server support allowed remote     attackers to cause a denial of service (segmentation     fault and server crash) by leveraging failure to ensure     that all initialization occurs talking to a client in     the nbd_negotiate function (bsc#1043808).

  - CVE-2017-15289: The mode4and5 write functions allowed     local OS guest privileged users to cause a denial of     service (out-of-bounds write access and Qemu process     crash) via vectors related to dst calculation     (bsc#1063122)

  - CVE-2017-15038: Race condition in the v9fs_xattrwalk     function local guest OS users to obtain sensitive     information from host heap memory via vectors related to     reading extended attributes (bsc#1062069)

  - CVE-2017-10911: The make_response function in the Linux     kernel allowed guest OS users to obtain sensitive     information from host OS (or other guest OS) kernel     memory by leveraging the copying of uninitialized     padding fields in Xen block-interface response     structures (bsc#1057378)

  - CVE-2017-12809: The IDE disk and CD/DVD-ROM Emulator     support allowed local guest OS privileged users to cause     a denial of service (NULL pointer dereference and QEMU     process crash) by flushing an empty CDROM device drive     (bsc#1054724)

  - CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which     allowed remote attackers to cause a denial of service     (daemon crash) by disconnecting during a     server-to-client reply attempt (bsc#1046636)

  - CVE-2017-10806: Stack-based buffer overflow allowed     local guest OS users to cause a denial of service (QEMU     process crash) via vectors related to logging debug     messages (bsc#1047674)

  - CVE-2017-14167: Integer overflow in the load_multiboot     function allowed local guest OS users to execute     arbitrary code on the host via crafted multiboot header     address values, which trigger an out-of-bounds write     (bsc#1057585)

  - CVE-2017-11434: The dhcp_decode function in     slirp/bootp.c allowed local guest OS users to cause a     denial of service (out-of-bounds read) via a crafted     DHCP options string (bsc#1049381)

  - CVE-2017-11334: The address_space_write_continue     function allowed local guest OS privileged users to     cause a denial of service (out-of-bounds access and     guest instance crash) by leveraging use of     qemu_map_ram_ptr to access guest ram block area     (bsc#1048902)

  - CVE-2017-13672: The VGA display emulator support allowed     local guest OS privileged users to cause a denial of     service (out-of-bounds read and QEMU process crash) via     vectors involving display update (bsc#1056334)

The update package also includes non-security fixes. See advisory for details.

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2408 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines     that use KVM in environments managed by Red Hat products.

    Security Fix(es):

    * Quick Emulator (QEMU) built with Network Block Device (NBD) Server support was vulnerable to a null-     pointer dereference issue. The flaw could occur when releasing a client that was not initialized due to     failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server (denial     of service). (CVE-2017-9524)

    * An information-exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR)     optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user     inside a guest could use this issue to read portions of the host memory. (CVE-2016-4020)

    * A memory-leak flaw was found in the Quick Emulator (QEMU) built with USB xHCI controller emulation     support. The flaw could occur while doing a USB-device unplug operation. Unplugging the device repeatedly     resulted in leaking host memory, which affected other services on the host. A privileged user inside the     guest could exploit this flaw to cause a denial of service on the host or potentially crash the host's     QEMU process instance. (CVE-2016-7466)

    * Multiple CVEs were fixed as a result of rebase to QEMU 2.9.0. (CVE-2016-6888, CVE-2016-7422,     CVE-2016-8576, CVE-2016-8669, CVE-2016-8909, CVE-2016-8910, CVE-2016-9907, CVE-2016-9911, CVE-2016-9921,     CVE-2016-9922, CVE-2016-10155, CVE-2017-5579, CVE-2017-5973, CVE-2017-6414, CVE-2017-8309, CVE-2017-8379,     CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375)

    Red Hat would like to thank Donghai Zdh (Alibaba Inc.) for reporting CVE-2016-4020; Li Qiang (Qihoo 360     Inc.) for reporting CVE-2016-6888; Qinghao Tang (Marvel Team 360.cn Inc.) and Zhenhao Hong (Marvel Team     360.cn Inc.) for reporting CVE-2016-7422; Li Qiang (360.cn Inc.) for reporting CVE-2016-7466,     CVE-2016-10155, CVE-2017-5579, CVE-2017-5973, and CVE-2017-6414; PSIRT (Huawei Inc.) for reporting     CVE-2016-8669; Andrew Henderson (Intelligent Automation Inc.) for reporting CVE-2016-8910; Qinghao Tang     (Qihoo 360), Li Qiang (Qihoo 360), and Jiangxin (Huawei Inc.) for reporting CVE-2016-9921 and     CVE-2016-9922; Jiang Xin (PSIRT, Huawei Inc.) for reporting CVE-2017-8309 and CVE-2017-8379; and Li Qiang     (Qihoo 360 Gear Team) for reporting CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, and CVE-2017-9375.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

Qemu: usb: ohci: infinite loop due to incorrect return value [CVE-2017-9330] (#1457698) Qemu: nbd: segmentation fault due to client non-negotiation [CVE-2017-9524] (#1460173) Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort [CVE-2017-10664] (#1466466) Qemu: exec: oob access during dma operation [CVE-2017-11334] (#1471640) revised full fix for XSA-226 (regressed 32-bit Dom0 or backend domains)

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2017:1681 advisory.

    Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of     architectures. The qemu-kvm package provides the user-space component for running virtual machines that     use KVM.

    Security Fix(es):

    * Quick Emulator (QEMU) built with Network Block Device (NBD) Server support was vulnerable to a null-     pointer dereference issue. The flaw could occur when releasing a client, which was not initialized due to     failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server (denial     of service). (CVE-2017-9524)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

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

  - Memory leak in hw/audio/es1370.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5526)

  - Memory leak in hw/audio/ac97.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5525)

  - The xhci_kick_epctx function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (infinite     loop and QEMU process crash) via vectors related to     control transfer descriptor sequence.(CVE-2017-5973)

  - The sdhci_sdma_transfer_multi_blocks function in     hw/sd/sdhci.c in QEMU (aka Quick Emulator) allows local     OS guest privileged users to cause a denial of service     (infinite loop and QEMU process crash) via vectors     involving the transfer mode register during multi block     transfer.(CVE-2017-5987)

  - Memory leak in the megasas_handle_dcmd function in     hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows     local guest OS privileged users to cause a denial of     service (host memory consumption) via MegaRAID Firmware     Interface (MFI) commands with the sglist size set to a     value over 2 Gb.(CVE-2017-5856)

  - qemu_deliver_packet_iov in net/net.c in Qemu accepts     packet sizes greater than INT_MAX, which allows     attackers to cause a denial of service or possibly have     unspecified other impact.(CVE-2018-17963)

  - qemu-bridge-helper.c in QEMU 4.0.0 does not ensure that     a network interface name (obtained from bridge.conf or     a --br=bridge option) is limited to the IFNAMSIZ size,     which can lead to an ACL bypass.(CVE-2019-13164)

  - Buffer overflow in the 'megasas_mmio_write' function in     Qemu 2.9.0 allows remote attackers to have unspecified     impact via unknown vectors.(CVE-2017-8380)

  - Quick Emulator (Qemu) built with the VirtFS, host     directory sharing via Plan 9 File System(9pfs) support,     is vulnerable to an improper access control issue. It     could occur while accessing virtfs metadata files in     mapped-file security mode. A guest user could use this     flaw to escalate their privileges inside     guest.(CVE-2017-7493)

  - In QEMU 3.1.0, load_device_tree in device_tree.c calls     the deprecated load_image function, which has a buffer     overflow risk.(CVE-2018-20815)

  - Use-after-free vulnerability in the sofree function in     slirp/socket.c in QEMU (aka Quick Emulator) allows     attackers to cause a denial of service (QEMU instance     crash) by leveraging failure to properly clear ifq_so     from pending packets.(CVE-2017-13711)

  - Stack-based buffer overflow in hw/usb/redirect.c in     QEMU (aka Quick Emulator) allows local guest OS users     to cause a denial of service (QEMU process crash) via     vectors related to logging debug     messages.(CVE-2017-10806)

  - The dhcp_decode function in slirp/bootp.c in QEMU (aka     Quick Emulator) allows local guest OS users to cause a     denial of service (out-of-bounds read and QEMU process     crash) via a crafted DHCP options     string.(CVE-2017-11434)

  - The imx_fec_do_tx function in hw/net/imx_fec.c in QEMU     (aka Quick Emulator) does not properly limit the buffer     descriptor count when transmitting packets, which     allows local guest OS administrators to cause a denial     of service (infinite loop and QEMU process crash) via     vectors involving a buffer descriptor with a length of     0 and crafted values in bd.flags.(CVE-2016-7907)

  - tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c)     in QEMU 3.0.0 uses uninitialized data in an snprintf     call, leading to Information disclosure.(CVE-2019-9824)

  - interface_release_resource in hw/display/qxl.c in QEMU     4.0.0 has a NULL pointer dereference.(CVE-2019-12155)

  - hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator)     allows local guest OS privileged users to cause a     denial of service (infinite loop and CPU consumption)     via the message ring page count.(CVE-2017-8112)

  - Qemu has a Buffer Overflow in rtl8139_do_receive in     hw/net/rtl8139.c because an incorrect integer data type     is used.(CVE-2018-17958)

  - TSX Asynchronous Abort condition on some CPUs utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access.(CVE-2019-11135)

  - In QEMU 1:4.1-1, 1:2.1+dfsg-12+deb8u6,     1:2.8+dfsg-6+deb9u8, 1:3.1+dfsg-8~deb10u1,     1:3.1+dfsg-8+deb10u2, and 1:2.1+dfsg-12+deb8u12     (fixed), when executing script in lsi_execute_script(),     the LSI scsi adapter emulator advances 's->dsp' index     to read next opcode. This can lead to an infinite loop     if the next opcode is empty. Move the existing loop     exit after 10k iterations so that it covers no-op     opcodes as well.(CVE-2019-12068)

  - qemu-seccomp.c in QEMU might allow local OS guest users     to cause a denial of service (guest crash) by     leveraging mishandling of the seccomp policy for     threads other than the main thread.(CVE-2018-15746)

  - Qemu has a Buffer Overflow in pcnet_receive in     hw/net/pcnet.c because an incorrect integer data type     is used.(CVE-2018-17962)

  - Quick Emulator(Qemu) built with the VMWARE PVSCSI     paravirtual SCSI bus emulation support is vulnerable to     an OOB r/w access issue. It could occur while     processing SCSI commands 'PVSCSI_CMD_SETUP_RINGS' or     'PVSCSI_CMD_SETUP_MSG_RING'. A privileged user inside     guest could use this flaw to crash the Qemu process     resulting in DoS.(CVE-2016-4952)

  - m_cat in slirp/mbuf.c in Qemu has a heap-based buffer     overflow via incoming fragmented     datagrams.(CVE-2018-11806)

  - In Qemu 3.0.0, lsi_do_msgin in hw/scsi/lsi53c895a.c     allows out-of-bounds access by triggering an invalid     msg_len value.(CVE-2018-18849)

  - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an     fid path while it is being accessed by a second thread,     leading to (for example) a use-after-free     outcome.(CVE-2018-19364)

  - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS     users to cause a denial of service (crash) because of a     race condition during file renaming.(CVE-2018-19489)

  - QEMU, through version 2.10 and through version 3.1.0,     is vulnerable to an out-of-bounds read of up to 128     bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A     local attacker with permission to execute i2c commands     could exploit this to read stack memory of the qemu     process on the host.(CVE-2019-3812)

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in     usb_mtp_object_readdir doesn't consider that the     underlying filesystem may have changed since the time     lstat(2) was called in usb_mtp_object_alloc, a     classical TOCTTOU problem. An attacker with write     access to the host filesystem, shared with a guest, can     use this property to navigate the host filesystem in     the context of the QEMU process and read any file the     QEMU process has access to. Access to the filesystem     may be local or via a network share protocol such as     CIFS.(CVE-2018-16872)

  - ** DISPUTED ** An issue was discovered in ide_dma_cb()     in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest     system can crash the QEMU process in the host system     via a special SCSI_IOCTL_SEND_COMMAND. It hits an     assertion that implies that the size of successful DMA     transfers there must be a multiple of 512 (the size of     a sector). NOTE: a member of the QEMU security team     disputes the significance of this issue because a     'privileged guest user has many ways to cause similar     DoS effect, without triggering this     assert.'(CVE-2019-20175)

  - Quick Emulator (QEMU) built with Network Block Device     (NBD) Server support was vulnerable to a null-pointer     dereference issue. The flaw could occur when releasing     a client that was not initialized due to failed     negotiation. A remote user or process could exploit     this flaw to crash the qemu-nbd server (denial of     service).(CVE-2017-9524)

  - Qemu has integer overflows because IOReadHandler and     its associated functions use a signed integer data type     for a size value.(CVE-2018-18438)

  - The Bluetooth subsystem in QEMU mishandles negative     values for length variables, leading to memory     corruption.(CVE-2018-19665)

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.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
126673	Oracle Linux 7 : qemu (ELSA-2019-4713)	Nessus	Oracle Linux Local Security Checks	2019/7/15	2024/11/1	high
102209	Debian DSA-3925-1 : qemu - security update	Nessus	Debian Local Security Checks	2017/8/7	2025/12/4	high
102244	EulerOS 2.0 SP2 : qemu-kvm (EulerOS-SA-2017-1157)	Nessus	Huawei Local Security Checks	2017/8/8	2025/12/4	high
104429	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2017:2936-1)	Nessus	SuSE Local Security Checks	2017/11/7	2025/11/14	high
210314	RHEL 7 : qemu-kvm-rhev (RHSA-2017:2408)	Nessus	Red Hat Local Security Checks	2024/11/5	2024/11/5	medium
102938	Fedora 26 : xen (2017-b7f1197c23)	Nessus	Fedora Local Security Checks	2017/9/5	2025/11/24	high
101255	RHEL 7 : qemu-kvm (RHSA-2017:1681)	Nessus	Red Hat Local Security Checks	2017/7/6	2025/4/15	high
138009	EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790)	Nessus	Huawei Local Security Checks	2020/7/1	2024/3/5	critical

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