Vulnerability Note VU#286464

libpng contains integer overflows in progressive display image reading

The libpng library features the ability to display interlaced, or progressive display, PNG files or streams. A number of potential integer overflow errors exist in libpng's handling of such progressive display images. While the code that contains these errors introduces dangerous conditions, it is unclear what practical vulnerabilities it might present in applications using libpng.

Multiple applications support the PNG image format, including web browsers, email clients, and various graphic utilities. Because multiple products have used the libpng reference library to implement native PNG image processing, multiple applications will be affected by this issue in different ways.

II. Impact

Patches have been released to address this vulnerability. Please see the Systems Affected section of this document for more details.

Systems Affected

http://scary.beasts.org/security/CESA-2004-001.txt
http://www.libpng.org/pub/png/
http://libpng.sourceforge.net/

Credit

Thanks to Chris Evans for reporting this vulnerability.

This document was written by Chad Dougherty and Damon Morda.

Other Information

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