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
EPSS: 0.003 (25.1th percentile) — read the EPSS interpretation.
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.
Affected products
- X.org X_server
- N/a Xorg-x11-server — versions All
Weakness classification (CWE)
References
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, 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.