X.Org X11 MIT-SHM extension integer overflow

xorg-mitshm-overflow (39764)

High Risk

Description:

X.Org X11 is vulnerable to an integer overflow caused by improper bounds checking by the MIT-SHM extension. If the X server is configured for TCP connections, a remote attacker could create a pixmap with a specially calculated size to overflow a buffer and execute arbitrary code on the system with root privileges.

Platforms Affected:

• Apple, Mac OS X 10.4.11
• Apple, Mac OS X 10.5.2
• Apple, Mac OS X Server 10.4.11
• Apple, Mac OS X Server 10.5.2
• Avaya, Call Management System 12
• Avaya, Call Management System 13
• Avaya, Call Management System 13.1
• Avaya, Call Management System 14
• Avaya, Interactive Response 2.0
• Avaya, Interactive Response 3.0
• Canonical, Ubuntu 6.06 LTS
• Canonical, Ubuntu 6.10
• Canonical, Ubuntu 7.04
• Canonical, Ubuntu 7.10
• Debian, Debian Linux 3.1
• Debian, Debian Linux 4.0
• Gentoo, Linux
• IBM, AIX 5.2
• IBM, AIX 5.3
• IBM, AIX 6.1
• Mandriva, Corporate Server 3.0
• Mandriva, Corporate Server 3.0 X86_64
• Mandriva, Corporate Server 4.0 X86_64
• Mandriva, Corporate Server 4.0
• Mandriva, Linux 2007 X86_64
• Mandriva, Linux 2007
• Mandriva, Linux 2007.1 X86_64
• Mandriva, Linux 2007.1
• Mandriva, Linux 2008.0
• Mandriva, Linux 2008.0 X86_64
• Novell, Linux Desktop 9
• Novell, Linux POS 9
• Novell, Open Enterprise Server
• Novell, Open Enterprise Server
• Novell, OpenSUSE 10.2
• Novell, OpenSUSE 10.3
• Novell, SLE SDK 10 SP1
• Novell, SUSE Linux Enterprise Desktop 10 SP1
• Novell, SUSE Linux Enterprise Server 10
• Novell, SUSE Linux Enterprise Server 10 SP1
• RedHat, Enterprise Linux 2.1 WS
• RedHat, Enterprise Linux 2.1 AS
• RedHat, Enterprise Linux 2.1 ES
• RedHat, Enterprise Linux 3 WS
• RedHat, Enterprise Linux 3 Desktop
• RedHat, Enterprise Linux 3 AS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 4 WS
• RedHat, Enterprise Linux 4 ES
• RedHat, Enterprise Linux 4 AS
• RedHat, Enterprise Linux 4 Desktop
• RedHat, Enterprise Linux 5 Client
• RedHat, Enterprise Linux 5 Client Workstation
• RedHat, Enterprise Linux 5
• RedHat, Linux Advanced Workstation 2.1 Itanium
• Sun, Solaris 10 x86
• Sun, Solaris 10 SPARC
• Sun, Solaris 8.0 x86
• Sun, Solaris 8.0 SPARC
• Sun, Solaris 9.0 x86
• Sun, Solaris 9.0 SPARC
• SuSE, SLE SDK 10
• SuSE, SuSE Linux 9.0
• SuSE, SuSE SLES 9
• X.Org, X.Org X11 R7.3 and prior

Remedy:

Upgrade to the latest version of X.Org X11 (1.4 or later), available from the X.Org Foundation Web site. See References.

For Sun Solaris:
Refer to Sun Alert ID: 103200 for patch, upgrade, or suggested workaround information. See References.

For Mac OS X:
Apply Security Update 2008-002, available from the Apple Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Gain Privileges

References:

• Apple Web site, About Security Update 2008-002 at http://docs.info.apple.com/article.html?artnum=307562.
• ASA-2008-077, A Security Vulnerability in the Solaris X Window System (X(5)) PCF Font Handler May Lead to Execution of Arbitrary Code or a Denial of Service (DoS) Condition at http://support.avaya.com/elmodocs2/security/ASA-2008-077.htm.
• ASA-2008-078, Multiple Security Vulnerabilities in the Solaris X Server Extensions May Lead to a Denial of Service (DoS) Condition or Allow Execution of Arbitrary Code at http://support.avaya.com/elmodocs2/security/ASA-2008-078.htm.
• BugTraq Mailing List, Wed Mar 05 2008 - 14:48:03 CST, X.Org X server and Xfont library: Multiple vulnerabilities at http://archives.neohapsis.com/archives/bugtraq/2008-03/0049.html.
• IBM Subscription service Bulletin 4136, AIX X server multiple vulnerabilities at http://www14.software.ibm.com/webapp/set2/subscriptions/ijhifoeblist?mode=7&heading=AIX61&path=/200802/SECURITY/20080227/datafile112539&label=AIX%20X%20server%20multiple%20vulnerabilities.
• iDefense PUBLIC ADVISORY: 01.17.08, Multiple Vendor X Server EVI and MIT-SHM Extensions Integer Overflow Vulnerabilities at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=645.
• Sun Alert ID: 103200, Multiple Security Vulnerabilities in the Solaris X Server Extensions May Lead to a Denial of Service (DoS) Condition or Allow Execution of Arbitrary Code at http://sunsolve.sun.com/search/document.do?assetkey=1-26-103200-1.
• X.Org Foundation Web site, X.Org Wiki - Home at http://xorg.freedesktop.org/wiki/Home.
• X.Org Mailing List, Thu Jan 17 06:05:34 PST 2008, X.Org security advisory: multiple vulnerabilities in the X server at http://lists.freedesktop.org/archives/xorg/2008-January/031918.html.
• ASA-2008-035: XFree86 security update (RHSA-2008-0029)
• ASA-2008-036: xorg-x11 security update (RHSA-2008-0030)
• ASA-2008-039: Multiple Security Vulnerabilities in the Solaris X Server Extensions May Lead to a Denial of Service (DoS) Condition or Allow Execution of Arbitrary Code
• ASA-2008-078: Multiple Security Vulnerabilities in the Solaris X Server Extensions May Lead to a Denial of Service (DoS) Condition or Allow Execution of Arbitrary Code (Sun 200153)
• BID-27336: RETIRED: X.Org X Server Local Privilege Escalation and Information Disclosure Vulnerabilities
• BID-27350: X.Org X Server 'MIT-SHM' Local Privilege Escalation Vulnerability
• BID-27353: X.Org X Server 'EVI' Extension Local Privilege Escalation Vulnerability
• CVE-2007-6429: Multiple integer overflows in X.Org Xserver before 1.4.1 allow context-dependent attackers to execute arbitrary code via (1) a GetVisualInfo request containing a 32-bit value that is improperly used to calculate an amount of memory for allocation by the EVI extension, or (2) a request containing values related to pixmap size that are improperly used in management of shared memory by the MIT-SHM extension.
• DSA-1466: xorg-server -- several vulnerabilities
• FrSIRT/ADV-2008-0179: X.Org X11 Integer Overflow and Memory Corruption Vulnerabilities
• FrSIRT/ADV-2008-0184: Sun Solaris X Windows Integer Overflow and Memory Corruption Issues
• FrSIRT/ADV-2008-0497: NoMachine NX Server Security Update Fixes X11 Multiple Vulnerabilities
• FrSIRT/ADV-2008-0703: IBM AIX Privilege Escalation and Remote Code Execution Vulnerabilities
• FrSIRT/ADV-2008-0924: Apple Mac OS X Command Execution and Security Bypass Issues
• GLSA-200801-09: X.Org X server and Xfont library: Multiple vulnerabilities
• MDVSA-2008:021: Updated XFree86 packages fix multiple vulnerabilities
• MDVSA-2008:022: Updated xorg-x11 packages fix multiple vulnerabilities
• MDVSA-2008:023: Updated x11-server packages fix multiple vulnerabilities
• MDVSA-2008:025: Updated x11-server-xgl packages fix multiple vulnerabilities
• RHSA-2008-0029: Important: XFree86 security update
• RHSA-2008-0030: Important: xorg-x11 security update
• RHSA-2008-0031: Important: xorg-x11-server security update
• SA28532: X.org X11 Multiple Vulnerabilities
• SA28550: Sun Solaris X Window System and X Server Multiple Vulnerabilities
• SA28693: Avaya CMS Solaris X Window System and X Server Multiple Vulnerabilities
• SA28885: NX Server X11 Multiple Vulnerabilities
• SA28941: Avaya CMS Sun Solaris X Window System and X Server Vulnerabilities
• SA29139: IBM AIX X Server Multiple Vulnerabilities
• SA29420: Mac OS X Security Update Fixes Multiple Vulnerabilities
• SA30161: Gentoo ltsp Multiple Vulnerabilities
• SECTRACK ID: 1019232: X Server Bugs in XFree86, Xinput, TOG-CUP, MIT-SHM, and EVI Extensions Let Local Users Gain Root Privileges
• SUSE-SA:2008:003: Xorg Security Problems
• SUSE-SR:2008:003: SUSE Security Summary Report
• SUSE-SR:2008:008: SUSE Security Summary Advisory
• USN-571-1: X.org vulnerabilities
• USN-571-2: X.org regression

Reported:

Jan 17, 2008

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