SB2017101037 - Buffer overflow in Debian Linux
Published: October 10, 2017 Updated: August 4, 2020
Security Bulletin ID
SB2017101037
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2017-13723)
The vulnerability allows a local authenticated user to execute arbitrary code.
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
Remediation
Install update from vendor's website.
References
- http://www.debian.org/security/2017/dsa-4000
- http://www.openwall.com/lists/oss-security/2017/10/04/10
- http://www.securityfocus.com/bid/101253
- https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac
- https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html
- https://lists.x.org/archives/xorg-announce/2017-October/002808.html
- https://security.gentoo.org/glsa/201710-30