SB2020112301 - Privilege escalation in libvirt

Description

This security bulletin contains information about 1 vulnerability.

1) Double Free (CVE-ID: CVE-2020-25637)

CWE-ID: CWE-415 - Double Free

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1881037