Executive Summary

Title NVIDIA UNIX GPU driver ARGB cursor buffer overflow in "NoScanout" mode
Name VU#771620 First vendor Publication 2013-04-05
Vendor VU-CERT Last vendor Modification 2013-04-05
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:H/Au:S/C:C/I:C/A:C)
Cvss Base Score 7.1 Attack Range Network
Cvss Impact Score 10 Attack Complexity High
Cvss Expoit Score 3.9 Authentication Requires single instance
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Vulnerability Note VU#771620

NVIDIA UNIX GPU driver ARGB cursor buffer overflow in "NoScanout" mode

Original Release date: 05 Apr 2013 | Last revised: 05 Apr 2013


NVIDIA UNIX video drivers contain a buffer overflow vulnerability when run in NoScanout mode.


The NVIDIA security advisory states:

    NVIDIA UNIX GPU Driver ARGB Cursor Buffer Overflow in "NoScanout" Mode.

    When the NVIDIA driver for the X Window System is operated in "NoScanout" mode, and an X client installs an ARGB cursor that is larger than the expected size (64x64 or 256x256, depending on the driver version), the driver will overflow a buffer. This can cause a denial of service (e.g., an X server segmentation fault), or could be exploited to achieve arbitrary code execution. Because the X server runs as setuid root in many configurations, an attacker could potentially use this vulnerability in those configurations to gain root privileges.

    To install an ARGB cursor, an application would require a connection to a running X server. Normally, X servers are configured to only accept authenticated connections from the local host, but some X servers may be configured to more permissively allow connections, and/or to allow connections over a network.

    "NoScanout" mode is enabled implicitly on NVIDIA products which lack display output connectors, and can be enabled explicitly on some other configurations with the X configuration option:

    Option "UseDisplayDevice" "none"

    NVIDIA GPU drivers for OSes other than Linux, FreeBSD, VMware ESX, and Solaris are not affected.

    This vulnerability has been present since NVIDIA driver version 195.22.
    The overflow is fixed in 304.88, 310.44, 313.30, and all drivers newer than those versions.

    NVIDIA recommends that users upgrade to a fixed driver version, or disable NoScanout mode, where possible.

    This vulnerability was identified by NVIDIA. There are no known reports of exploits of this vulnerability in the wild.

Additional details may be found in the full NVIDIA security advisory.


A local authenticated attacker may be able to exploit this vulnerability to gain privilege escalation to the root user.


Apply an Update

The overflow is fixed in driver versions 304.88, 310.44, 313.30, and all drivers newer than those versions. Users should download the drivers directly from NVIDIA.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
NVIDIAAffected-05 Apr 2013
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)



  • http://nvidia.custhelp.com/app/answers/detail/a_id/3290
  • http://www.nvidia.com/Download/index.aspx?lang=en-us


Thanks to the NVIDIA security team for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

  • CVE IDs:CVE-2013-0131
  • Date Public:05 Apr 2013
  • Date First Published:05 Apr 2013
  • Date Last Updated:05 Apr 2013
  • Document Revision:9


If you have feedback, comments, or additional information about this vulnerability, please send us email.

Original Source

Url : http://www.kb.cert.org/vuls/id/771620

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:18371
Oval ID: oval:org.mitre.oval:def:18371
Title: USN-1799-1 -- nvidia-graphics-drivers, nvidia-graphics-drivers-updates, nvidia-settings, nvidia-settings-updates vulnerability
Description: NVIDIA graphics drivers could be made to run programs as an administrator 2E Software Description: - nvidia-graphics-drivers: NVIDIA binary Xorg driver - nvidia-graphics-drivers-updates: NVIDIA binary Xorg driver - nvidia-settings: Tool for configuring the NVIDIA graphics driver - nvidia-settings-updates: Tool for configuring the NVIDIA graphics drive r Details: It was discovered that the NVIDIA graphics drivers incorrectly handled large ARGB cursors.
Family: unix Class: patch
Reference(s): USN-1799-1
Version: 7
Platform(s): Ubuntu 12.10
Ubuntu 12.04
Product(s): nvidia-graphics-drivers
Definition Synopsis:

CPE : Common Platform Enumeration

Application 34

Nessus® Vulnerability Scanner

Date Description
2013-04-12 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_1431f2d6a06e11e2b9e0001636d274f3.nasl - Type : ACT_GATHER_INFO
2013-04-11 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1799-1.nasl - Type : ACT_GATHER_INFO
2013-04-09 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201304-01.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2013-05-16 17:18:16
  • Multiple Updates
2013-05-11 05:18:25
  • Multiple Updates
2013-04-09 21:20:19
  • Multiple Updates
2013-04-08 21:20:22
  • Multiple Updates
2013-04-06 00:17:21
  • First insertion