Security Vulnerability in Solaris libpng(3) May Allow a Remote User to Disclose Potentially Sensitive Information from Applications Linked to libpng(3)

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Multiple security vulnerabilities in libpng(3):

1. Impact

Multiple security vulnerabilities in libpng(3), which is shipped with Solaris, may allow a local or remote unprivileged user to disclose potentially sensitive information associated with applications linked to libpng(3), when a user has loaded a specially crafted Portable Network Graphics (PNG) format image file (.png) supplied by an untrusted user.

These issues are also described in the following document:

    CVE-2009-2042 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2042

2. Contributing Factors

These issues can occur in the following releases:

SPARC Platform

• GNOME 2.0 (for Solaris 8)
• Solaris 9
• Solaris 10 without patch 137080-04
• OpenSolaris builds snv_01 through snv_123
  

x86 Platform

• GNOME 2.0 (for Solaris 8)
• Solaris 9
• Solaris 10 without patch 137081-04
  
• OpenSolaris builds snv_01 through snv_123
  

Note 1: To determine if an application has a dynamic dependency on the libpng(3) library, the ldd(1) utility can be used:

    $ ldd /bin/evince | grep libpng
    libpng12.so.0 => /usr/lib/libpng12.so.0

However, some applications may use libpng(3) but not report libpng(3) as a dynamic dependency with ldd(1) if the library is loaded by dlopen(3C). Therefore, to display all shared objects used by an application, pldd(1) should be used against the running process:

    $ pldd <pid of application> | grep libpng
    /usr/lib/libpng12.so.0.35.0

Note 2: 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 issues have been exploited.

4. Workaround

To work around the described issues , do not load PNG files from untrusted sources (or to be completely safe, do not view any PNG files).

5. Resolution

These issues are addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 137080-04 or later
  
• OpenSolaris based upon builds snv_124 or later

x86 Platform

• Solaris 10 with patch 137081-04 or later
• OpenSolaris based upon builds snv_124 or later

A final resolution is pending completion.

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


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Modification History

10-Nov-2009: Updated Contributing Factors and Resolution sections.

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