[ GLSA 200707-06 ] XnView: Stack-based buffer overflow

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  Severity: Normal
     Title: XnView: Stack-based buffer overflow
      Date: July 11, 2007
      Bugs: #175670
        ID: 200707-06

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Synopsis

XnView is vulnerable to a stack-based buffer overflow and possible remote code execution when handling XPM image files.

Background

XnView is software to view and convert graphics files. XPixMap (XPM) is a simple ascii-based graphics format.

Affected packages

     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  x11-misc/xnview       < 1.70                          Vulnerable!
    -------------------------------------------------------------------
     # Package 1 only applies to x86 users.
    -------------------------------------------------------------------
     NOTE: Certain packages are still vulnerable. Users should migrate
           to another package if one is available or wait for the
           existing packages to be marked stable by their
           architecture maintainers.

Description

XnView is vulnerable to a stack-based buffer overflow while processing an XPM file with an overly long section string (greater than 1024 bytes).

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Impact

An attacker could entice a user to view a specially crafted XPM file with XnView that could trigger the vulnerability and possibly execute arbitrary code with the rights of the user running XnView.

Workaround

There is no known workaround at this time.

Resolution

No update appears to be forthcoming from the XnView developer and XnView is proprietary, so the XnView package has been masked in Portage. We recommend that users select an alternate graphics viewer and conversion utility, and unmerge XnView:

    # emerge --unmerge xnview

References

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  [ 1 ] CVE-2007-2194
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2194

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200707-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

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In addition to our free technical library, Pantek provides professional IT services to companies who utilize Open Source software: Learn more about Pantek's Technical Support offerings Place an order for 24/7/365 Technical Support here Learn more about Pantek, who we are, and what we do Chat with a Live Operator Related securityfocus.com Links bugtraq certification focus-bsd focus-ids focus-ih focus-linux focus-ms focus-sun focus-unix-other focus-virus forensics incidents libnet linux-secnews ms-secnews pen-test secpapers secprog sectools secureshell security-basics securityjobs sf-news vuln-dev webappsec Request more information about Pantek

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