CVE-2021-31523 Privilege escalation in n/a
Local attackers can escalate privileges due to excessive capabilities granted to the sonar binary in the Debian xscreensaver package.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31523?
CVE-2021-31523 is a high-severity vulnerability in n/a, published on 21 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which allows local users to gain privileges because this is arguably incompatible with the design of the Mesa 3D Graphics library dependency.
Weakness: CWE-269
Which versions are affected by CVE-2021-31523?
It affects 1 product.
Products include Xscreensaver Project Xscreensaver.
How do I fix CVE-2021-31523?
Apply the vendor's patch.
Is CVE-2021-31523 being exploited?
There is no known exploitation of CVE-2021-31523 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-31523, GHSA-74g6-fv7f-g2hq, UBUNTU-CVE-2021-31523.