Double Free Affecting virt:rhel/libvirt-daemon-driver-nodedev package, versions <0:6.0.0-35.module+el8.4.0+10230+7a9b21e4


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4041213
  • published26 Jul 2021
  • disclosed30 Sept 2020

Introduced: 30 Sep 2020

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

How to fix?

Upgrade RHEL:8 virt:rhel/libvirt-daemon-driver-nodedev to version 0:6.0.0-35.module+el8.4.0+10230+7a9b21e4 or higher.
This issue was patched in RHSA-2021:1762.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/libvirt-daemon-driver-nodedev package and not the virt:rhel/libvirt-daemon-driver-nodedev package as distributed by RHEL. See How to fix? for RHEL:8 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