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

  - A NULL pointer dereference flaw was discovered in     libvirt in the way it gets interface information     through the QEMU agent. An attacker in a guest VM can     use this flaw to crash libvirtd and cause a denial of     service.(CVE-2019-3840)

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.

An update of the libvirt package has been released.

An update for libvirt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The libvirt library contains a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems.
In addition, libvirt provides tools for remote management of virtualized systems.

Security Fix(es) :

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

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

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	名称	产品	系列	发布时间	最近更新时间	严重程度
126425	EulerOS 2.0 SP5 : libvirt (EulerOS-SA-2019-1684)	Nessus	Huawei Local Security Checks	2019/7/2	2025/2/25	medium
202769	Photon OS 3.0: Libvirt PHSA-2019-3.0-0016	Nessus	PhotonOS Local Security Checks	2024/7/22	2025/2/19	medium
202875	Photon OS 2.0: Libvirt PHSA-2019-2.0-0161	Nessus	PhotonOS Local Security Checks	2024/7/22	2025/2/19	medium
128386	CentOS 7 : libvirt (CESA-2019:2294)	Nessus	CentOS Local Security Checks	2019/8/30	2025/2/24	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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