X.org X11 composite extension buffer overflow

xorg-composite-bo (36535) The risk level is classified as HighHigh Risk

Description:

X.org X11 is vulnerable to a buffer overflow, caused by improper bounds checking by the composite extension. By copying data between specially-crafted pixmaps, a local attacker could overflow a buffer and execute arbitrary code on the system.

*CVSS:

Base Score: 4.6
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 3.4
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

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

Debian/GNU Linux:
Refer to DSA-1372-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux (x11-server):
Refer to MDKSA-2007:178 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux (xorg):
Refer to USN-514-1 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • X.Org Foundation Web site: X.Org Wiki - Home.
  • ASA-2007-394: Xorg-x11 security update (RHSA-2007-0898)
  • BID-25606: X.Org X Server Composite Extension Local Buffer Overflow Vulnerability
  • CVE-2007-4730: Buffer overflow in the compNewPixmap function in compalloc.c in the Composite extension for the X.org X11 server before 1.4 allows local users to execute arbitrary code by copying data from a large pixel depth pixmap into a smaller pixel depth pixmap.
  • DSA-1372: xorg-server -- buffer overflow
  • GLSA-200710-16: X.Org X server: Composite local privilege escalation
  • MDKSA-2007:178: Updated x11-server packages fix vulnerability
  • MDVSA-2008:022: Updated xorg-x11 packages fix multiple vulnerabilities
  • RHSA-2007-0898: Moderate: xorg-x11 security update
  • SA26743: X.org X11 Composite Pixmap Privilege Escalation Vulnerability
  • SA27147: Avaya Products X.org X11 Composite Pixmap Privilege Escalation
  • SA30161: Gentoo ltsp Multiple Vulnerabilities
  • SECTRACK ID: 1018665: X Server Bug in compNewPixmap() Lets Local Users Gain Elevated Privileges
  • SUSE-SA:2007:054: Xorg security problems
  • USN-514-1: X.org vulnerability
  • VUPEN/ADV-2007-3098: X.Org X Server Composite Extension Local Privilege Escalation Vulnerability

Platforms Affected:

  • Avaya Intuity Audix LX
  • Avaya Message Networking
  • Avaya Message Storage Server 3.0
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 4.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • Novell Linux POS 9
  • Novell OpenSUSE 10.2
  • Novell OpenSUSE 10.3
  • Novell SLE SDK 10 SP1
  • Novell SLE SDK 10
  • Novell SUSE Linux Enterprise Desktop 10 SP1
  • Novell SUSE Linux Enterprise Server 10 SP1
  • Novell SUSE Linux Enterprise Server 10
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 AS
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 10.1
  • SUSE SuSE Linux 9.0
  • X.Org X11 7.x

Reported:

Sep 09, 2007

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