Privilege escalation in Xscreensaver Project
CVE-2021-31523
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Xscreensaver Project — versions 5.42\+dfsg1-1, 5.42+dfsg1-1
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2021/04/17/1 (Patch, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/04/21/3 (mailing-list, Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31523?
- CVE-2021-31523 is a high-severity vulnerability in Xscreensaver Project, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2021-04-21.
- How severe is CVE-2021-31523?
- High severity. CVSS v3 base score is 7.8 out of 10.