CVE-2020-25652 Denial of service in spice-vdagent

What is CVE-2020-25652?

CVE-2020-25652 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 26 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-770

Which versions are affected by CVE-2020-25652?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Spice-Space Spice-Vdagent.

How do I fix CVE-2020-25652?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-25652 being exploited?

There is no known exploitation of CVE-2020-25652 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-7364, DEBIAN-CVE-2020-25652, GHSA-6rmh-mmff-jmfj, UBUNTU-CVE-2020-25652.