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.

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.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - xorg-x11-server: unvalidated lengths in RENDER extension (CVE-2017-12187)

  - 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. (CVE-2015-3418)

  - In the X.Org X server before 2017-06-19, a user authenticated to an X Session could crash or execute code     in the context of the X Server by exploiting a stack overflow in the endianness conversion of X Events.
    (CVE-2017-10971)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

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.

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.

The remote Redhat Enterprise Linux 5 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - xorg-x11-server: unvalidated lengths in RENDER extension (CVE-2017-12187)

  - X.Org Server (aka xserver and xorg-server) before 1.16.3 and 1.17.x before 1.17.1 allows remote attackers     to obtain sensitive information from process memory or cause a denial of service (crash) via a crafted     string length value in a XkbSetGeometry request. (CVE-2015-0255)

  - 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. (CVE-2015-3418)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

ID	Name	Product	Family	Published	Updated	Severity
82103	Debian DLA-120-2 : xorg-server regression update	Nessus	Debian Local Security Checks	3/26/2015	1/11/2021	high
84396	SUSE SLED12 / SLES12 Security Update : xorg-x11-server (SUSE-SU-2015:1127-1)	Nessus	SuSE Local Security Checks	6/25/2015	1/6/2021	high
198556	RHEL 7 : xorg-x11-server (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	6/3/2024	6/3/2024	critical
96786	GLSA-201701-64 : X.Org X Server: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	1/26/2017	1/11/2021	high
84116	SUSE SLED11 / SLES11 Security Update : xorg-x11-server (SUSE-SU-2015:1025-1)	Nessus	SuSE Local Security Checks	6/11/2015	1/6/2021	high
198467	RHEL 5 : xorg-x11-server (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	6/3/2024	6/3/2024	critical

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