Improper Privilege Management in Debian Linux - CVE-2017-13721
Published: October 10, 2017 / Updated: August 4, 2020
Vulnerability identifier: #VU33522
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-13721
CWE-ID: CWE-269
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Debian Linux
Arch Linux
Gentoo Linux
Slackware Linux
xorg-server (Alpine package)
Arch Linux
Gentoo Linux
Slackware Linux
xorg-server (Alpine package)
How to mitigate CVE-2017-13721
Install update from vendor's website.
xorg-server (Alpine package) - update to 1.19.5-r0
External 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