Auth bypass in X.org X Server
CVE-2020-25697
A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an attacker to take control of an X application by impersonating the server it is expecting to connect to.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.9% 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
- X.org X Server
- Xorg-X11-Server — versions All
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2020/11/09/3 (mailing-list, Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac… (mailing-list)
- seclists.org/oss-sec/2020/q4/105 (Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2020-25697?
- CVE-2020-25697 is a high-severity vulnerability in X.org X Server, classified under Missing Authentication for Critical Function. CVSS score: 7.0/10. Published 2021-05-26.
- How severe is CVE-2020-25697?
- High severity. CVSS v3 base score is 7.0 out of 10.