A flaw was found in the spice-vdagentd daemon, where it did not properly handle client connections that can be established via the UNIX domain socket in /run/spice-vdagentd/spice-vdagent-sock. Any unprivileged local guest user could use this flaw to prevent legitimate agents from connecting to the spice-vdagentd daemon, resulting in a denial of service. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and prior.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-25652
• https://bugzilla.redhat.com/show_bug.cgi?id=1886366
• https://lists.debian.org/debian-lts-announce/2021/01/msg00012.html
• https://lists.fedoraproject.org/archives/list/[email protected]/message/GQT56LATVTB2DJOVVJOKQVMVUXYCT2VB/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/OIWJ2EIQXWEA2VDBODEATHAT37X4CREP/
• https://www.openwall.com/lists/oss-security/2020/11/04/1