Fedora Core 2: FEDORA-2004-238 Critical: libpng Buffer Overflow

The libpng10 package contains an old version of libpng, a library of

functions for creating and manipulating PNG (Portable Network Graphics)

image format files.

This package is needed if you want to run binaries that were linked

dynamically

with libpng 1.0.x.

The libpng10 package contains an old version of libpng, a library of

functions for creating and manipulating PNG (Portable Network Graphics)

image format files.

This package is needed if you want to run binaries that were linked

dynamically with libpng 1.0.x.

The libpng package contains a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files.

During a source code audit, Chris Evans discovered several buffer overflows in libpng. An attacker could create a carefully crafted PNG file in such a way that it would cause an application linked with libpng to execute arbitrary code when the file was opened by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0597 to these issues.

In addition, this audit discovered a potential NULL pointer dereference in libpng (CAN-2004-0598) and several integer overflow issues (CAN-2004-0599). An attacker could create a carefully crafted PNG file in such a way that it would cause an application linked with libpng to crash when the file was opened by the victim.

Red Hat would like to thank Chris Evans for discovering these issues.

* Fri Jul 23 2004 Matthias Clasen <mclasen@redhat.com> 1.0.15-8

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