A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual machine. Any unprivileged local guest user with access to the UNIX domain socket path /run/spice-vdagentd/spice-vdagent-sock could use this flaw to perform a memory denial of service for spice-vdagentd or even other processes in the VM system. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and previous versions.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-25650
• https://bugzilla.redhat.com/show_bug.cgi?id=1886345
• 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