#VU59046 Out-of-bounds write in X.org Server - CVE-2021-4009

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Main Vulnerability Database Vulnerabilities #VU59046

#VU59046 Out-of-bounds write in X.org Server - CVE-2021-4009

Published: December 17, 2021 / Updated: December 21, 2021


Vulnerability identifier: #VU59046
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2021-4009
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
X.org Server
Software vendor:
X.org

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the ProcXFixesCreatePointerBarrier() function in the XFixes extension. A local user can send a specially crafted CreatePointerBarrier request, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


Remediation

Install updates from vendor's website.

External links