Multiple Integer Overflow Vulnerabilities in the libtiff(3) Image Conversion Tools 'tiff2rgba' and 'rgb2ycbcr' May Lead to Arbitrary Code Execution

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Multiple Integer Overflow Vulnerabilities in the libtiff(3) Image Conversion Tools 'tiff2rgba' and 'rgb2ycbcr' May Lead to Arbitrary Code Execution

1. Impact

Multiple integer overflow vulnerabilities in the libtiff(3) image conversion tools 'tiff2rgba' and 'rgb2ycbcr' may allow a local or remote unprivileged user to execute arbitrary code via a TIFF image with large width and height values.

This issue is also described in the following document:


2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• GNOME 2.0 (for Solaris 8)
  
• Solaris 9
• Solaris 10 without patch 119900-09
• OpenSolaris based upon builds snv_01 through snv_121

x86 Platform

• GNOME 2.0 (for Solaris 8)
• Solaris 9
• Solaris 10 without patch 119901-08
• OpenSolaris based upon builds snv_01 through snv_121

Notes:

1. Solaris 8 entered EOSL Phase 2 on 1 April 2009. Entitlement to patches developed on or after 1 April 2009 requires the purchase of the Solaris 8 Vintage Patch Service. See Note in section 5 for more details.

2. This issue only affect systems which have the libtiff(3) conversion utilities tiff2rgba and rgb2ycbcr installed. These utilities are part of the SUNWTiff package. To check whether the SUNWTiff package is installed on Solaris 8, 9, and 10 the pkginfo(1) command can be used as in the following example:

$ pkginfo -q SUNWTiff && echo "SUNWTiff is installed"

3. OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. To determine the base build of OpenSolaris, the following command can be used:

$ uname -v
snv_86

3. Symptoms

There are no predictable symptoms that would indicate the described issue has been exploited to execute arbitrary code.

4. Workaround

To work around the described issue, do not load TIFF images from untrusted sources.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 119900-09 or later
  
• OpenSolaris based upon builds snv_122 or later

x86 Platform

• Solaris 10 with patch 119901-08 or later
  
• OpenSolaris based upon builds snv_122 or later

A final resolution is pending completion for GNOME 2.0 (for Solaris 8) and Solaris 9.

Note: The READMEs of Solaris 8 patches developed on or after 1 April 2009 are available to all customers however Solaris 8 entered EOSL Phase 2 on April 1, 2009 and thus entitlement for these patches, including those that fix security vulnerabilities, requires the purchase of the Solaris 8 Vintage Patch Service. More information about the Solaris 8 Vintage Patch Service is available at:


For more information on Security Sun Alerts, see Technical Instruction ID 213557.

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Modification History

20-Aug-2009: Update Contributing Factors and Resolution sections

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