The ProcPutImage function in dix/dispatch.c in X.Org Server (aka xserver and xorg-server) before 1.16.4 allows attackers to cause a denial of service (divide-by-zero and crash) via a zero-height PutImage request.

The remote host is affected by the vulnerability described in GLSA-201701-64 (X.Org X Server: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in X.Org X Server. Please       review the CVE identifiers referenced below for details.
  Impact :

    An authenticated attacker could possibly cause a Denial of Service       condition or read from or send information to arbitrary X11 clients.
  Workaround :

    There is no known workaround at this time.

The X Server was updated to fix 1 security issues and 4 bugs :

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xorg-x11-server fixes a regression introduced with the fix for CVE-2014-8092 :

CVE-2015-3418: Xserver: PutImage crashes Server when called with 0 height. (bsc#928520)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Andreas Cord-Landwehr reported an issue where the X.Org Xserver would often crash with an arithmetic exception when maximizing application windows.

This issue (CVE-2015-3418) is a regression which got introduced by fixing CVE-2014-8092. The above referenced version of xorg-server in Debian squeeze-lts fixes this regression in the following way :

The length checking code validates PutImage height and byte width by making sure that byte-width >= INT32_MAX / height. If height is zero, this generates a divide by zero exception. Allow zero height requests explicitly, bypassing the INT32_MAX check (in dix/dispatch.c).

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
96786	GLSA-201701-64 : X.Org X Server: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
84396	SUSE SLED12 / SLES12 Security Update : xorg-x11-server (SUSE-SU-2015:1127-1)	Nessus	SuSE Local Security Checks	high
84116	SUSE SLED11 / SLES11 Security Update : xorg-x11-server (SUSE-SU-2015:1025-1)	Nessus	SuSE Local Security Checks	high
82103	Debian DLA-120-2 : xorg-server regression update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2015-3418

high

Tenable Plugins

high

high

high

high