Double Free Affecting libvirt-daemon-driver-qemu package, versions <0:4.5.0-36.amzn2.3


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN2-LIBVIRTDAEMONDRIVERQEMU-1692299
  • published27 Sept 2021
  • disclosed6 Oct 2020

Introduced: 6 Oct 2020

CVE-2020-25637  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libvirt-daemon-driver-qemu to version 0:4.5.0-36.amzn2.3 or higher.
This issue was patched in ALAS2-2020-1569.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-daemon-driver-qemu package and not the libvirt-daemon-driver-qemu package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1