SB2017101036 - Improper Privilege Management in Debian Linux
Published: October 10, 2017 Updated: August 4, 2020
Security Bulletin ID
SB2017101036
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Privilege Management (CVE-ID: CVE-2017-13721)
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.
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/101238
- https://cgit.freedesktop.org/xorg/xserver/commit/?id=b95f25af141d33a65f6f821ea9c003f66a01e1f1
- https://lists.x.org/archives/xorg-announce/2017-October/002808.html
- https://security.gentoo.org/glsa/201710-30