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NULL Pointer Dereference Affecting libvirt-lock-sanlock package, versions <0:4.5.0-23.el7

Severity

 Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.23% (61st percentile)

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  • Snyk IDSNYK-RHEL7-LIBVIRTLOCKSANLOCK-4921316
  • published26 Jul 2021
  • disclosed10 Jan 2019
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Introduced: 10 Jan 2019

CVE-2019-3840  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:7 libvirt-lock-sanlock to version 0:4.5.0-23.el7 or higher.
This issue was patched in RHSA-2019:2294.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-lock-sanlock package and not the libvirt-lock-sanlock package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 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.