Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2020-25637

Double Free

Published: Oct 06, 2020 | Modified: Nov 21, 2024
CVSS 3.x
6.7
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
6.4 MODERATE
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Ubuntu
NEGLIGIBLE
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-25637
CWEhttps://cwe.mitre.org/data/definitions/415.html

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.

Weakness

The product calls free() twice on the same memory address.

Affected Software

NameVendorStart VersionEnd Version
LibvirtRedhat*6.8.0 (excluding)
Advanced Virtualization for RHEL 8.2.1RedHatvirt:8.2-8020120201106174547.863bb0db*
Advanced Virtualization for RHEL 8.2.1RedHatvirt-devel:8.2-8020120201106174547.863bb0db*
Red Hat Enterprise Linux 7RedHatlibvirt-0:4.5.0-36.el7_9.3*
Red Hat Enterprise Linux 8RedHatvirt-devel:rhel-8040020210317013608.9f9e2e7e*
Red Hat Enterprise Linux 8RedHatvirt:rhel-8040020210317013608.9f9e2e7e*
LibvirtUbuntubionic*
LibvirtUbuntuesm-infra-legacy/trusty*
LibvirtUbuntuesm-infra/bionic*
LibvirtUbuntuesm-infra/focal*
LibvirtUbuntuesm-infra/xenial*
LibvirtUbuntufocal*
LibvirtUbuntugroovy*
LibvirtUbuntuprecise/esm*
LibvirtUbuntutrusty*
LibvirtUbuntutrusty/esm*
LibvirtUbuntuupstream*
LibvirtUbuntuxenial*

Potential Mitigations

References

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