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

  - util/virlog.c in libvirt does not properly determine     the hostname on LXC container startup, which allows     local guest OS users to bypass an intended container     protection mechanism and execute arbitrary commands via     a crafted NSS module.(CVE-2018-6764)

  - qemu/qemu_monitor.c in libvirt allows attackers to     cause a denial of service (memory consumption) via a     large QEMU reply.(CVE-2018-5748)

  - libvirt version 2.3.0 and later is vulnerable to a bad     default configuration of 'verify-peer=no' passed to     QEMU by libvirt resulting in a failure to validate     SSL/TLS certificates by default. (CVE-2019-3840)

  - libvirt version 2.3.0 and later is vulnerable to a bad     default configuration of 'verify-peer=no' passed to     QEMU by libvirt resulting in a failure to validate     SSL/TLS certificates by default.(CVE-2017-1000256)

  - An incomplete fix for CVE-2018-5748 that affects QEMU     monitor leading to a resource exhaustion but now also     triggered via QEMU guest agent.(CVE-2018-1064)

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 Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3909-1 advisory.

    It was discovered that libvirt incorrectly handled waiting for certain agent events. An attacker inside a     guest could possibly use this issue to cause libvirtd to stop responding, resulting in a denial of     service.

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

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

This update for libvirt fixes the following issues :

Security issue fixed :

CVE-2019-3840: Fixed a NULL pointer dereference vulnerability in virJSONValueObjectHasKey function which could have resulted in a remote denial of service via the guest agent (bsc#1127458).

CVE-2019-3886: Fixed an information leak which allowed to retrieve the guest hostname under readonly mode (bsc#1131595).

Other issues addressed: libxl: support Xen's max_grant_frames setting with maxGrantFrames attribute on the xenbus controller (bsc#1126325).

conf: added new 'xenbus' controller type

util: skip RDMA detection for non-PCI network devices (bsc#1112182).

qemu: don't use CAP_DAC_OVERRIDE capability if non-root (bsc#1125665).

qemu: fix issues related to restricted permissions on /dev/sev(bsc#1102604).

libxl: save current memory value after successful balloon (bsc#1120813).

libxl: Add support for soft reset. (bsc#1081516)

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 MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2019-4192:10 advisory.

    * libvirt: NULL pointer dereference after running qemuAgentCommand in qemuAgentGetInterfaces function     (CVE-2019-3840)

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

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

Security Fix(es) :

  - libvirt: NULL pointer dereference after running     qemuAgentCommand in qemuAgentGetInterfaces function     (CVE-2019-3840)

This update for libvirt provides the following fixes :

Security issue fixed :

CVE-2019-3840: Fixed a NULL pointer dereference vulnerability in virJSONValueObjectHasKey function which could have resulted in a remote denial of service via the guest agent (bsc#1127458).

Other issues addressed: apparmor: reintroduce upstream lxc mount rules (bsc#1130129).

hook: encode incoming XML to UTF-8 before passing to lxml etree from string method (bsc#1123642).

supportconfig: collect rotated logs in /var/log/libvirt/* (bsc#1124667).

libxl: support Xen's max_grant_frames setting with maxGrantFrames attribute on the xenbus controller (bsc#1126325).

conf: added new 'xenbus' controller type

util: skip RDMA detection for non-PCI network devices (bsc#1112182).

qemu: don't use CAP_DAC_OVERRIDE capability if non-root (bsc#1125665).

qemu: fix issues related to restricted permissions on /dev/sev(bsc#1102604).

apparmor: add support for named profiles (bsc#1118952).

libxl: save current memory value after successful balloon (bsc#1120813).

apparmor: Fix ptrace rules. (bsc#1117058)

libxl: Add support for soft reset. (bsc#1081516)

libxl: Fix VM migration on busy hosts. (bsc#1108086)

qemu: Add support for SEV guests. (fate#325817)

util: Don't check for parallel iteration in hash-related functions.
(bsc#1106420)

spec: Don't restart libvirt-guests when updating libvirt-client.
(bsc#1104662)

Fix virNodeGetSEVInfo API crashing libvirtd on AMD SEV enabled hosts.
(bsc#1108395)

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 Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2019-2294 advisory.

    - api: disallow virDomainSaveImageGetXMLDesc on read-only connections (CVE-2019-10161)
    - api: disallow virDomainManagedSaveDefineXML on read-only connections (CVE-2019-10166)
    - api: disallow virConnectGetDomainCapabilities on read-only connections (CVE-2019-10167)
    - api: disallow virConnect*HypervisorCPU on read-only connections (CVE-2019-10168)
    - admin: reject clients unless their UID matches the current UID (CVE-2019-10132)
    - locking: restrict sockets to mode 0600 (CVE-2019-10132)
    - logging: restrict sockets to mode 0600 (CVE-2019-10132)
    - cputest: Add data for Intel(R) Xeon(R) CPU E3-1225 v5 (CVE-2018-12126, CVE-2018-12127, CVE-2019-11091,     CVE-2018-12130)
    - cpu_map: Define md-clear CPUID bit (CVE-2018-12126, CVE-2018-12127, CVE-2019-11091, CVE-2018-12130)
    - qemu: Remove duplicated qemuAgentCheckError (rhbz#1663051, CVE-2019-3840)
    - qemu: require reply from guest agent in qemuAgentGetInterfaces (rhbz#1663051, CVE-2019-3840)

Tenable has extracted the preceding description block directly from the Oracle 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.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
124959	EulerOS Virtualization 3.0.1.0 : libvirt (EulerOS-SA-2019-1456)	Nessus	Huawei Local Security Checks	2019/5/14	2024/5/22	high
122868	Ubuntu 16.04 LTS / 18.04 LTS : libvirt vulnerability (USN-3909-1)	Nessus	Ubuntu Local Security Checks	2019/3/15	2025/3/20	medium
124082	SUSE SLED12 / SLES12 Security Update : libvirt (SUSE-SU-2019:0948-1)	Nessus	SuSE Local Security Checks	2019/4/16	2024/6/3	medium
290060	MiracleLinux 7 : libvirt-4.5.0-23.el7 (AXSA:2019-4192:10)	Nessus	Miracle Linux Local Security Checks	2026/1/16	2026/1/16	medium
128237	Scientific Linux Security Update : libvirt on SL7.x x86_64 (20190806)	Nessus	Scientific Linux Local Security Checks	2019/8/27	2025/2/24	medium
124055	SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2019:0936-1)	Nessus	SuSE Local Security Checks	2019/4/15	2025/3/11	medium
180849	Oracle Linux 7 : libvirt (ELSA-2019-2294)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2025/2/19	medium

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