Double Free in libvirt - CVE-2020-25637
Published: October 6, 2020 / Updated: December 11, 2020
Vulnerability identifier: #VU48591
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2020-25637
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: libvirt.org
Affected software:
libvirt
libvirt
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the libvirt API, responsible for requesting information about network interfaces of a running QEMU domain. A local client 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.
How to mitigate CVE-2020-25637
Install updates from vendor's website.