libTIFF: Buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200505-07 / tiff
Release Date	May 10, 2005
Latest Revision	May 22, 2006: 02
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/tiff	< 3.7.2	>= 3.7.2	All supported architectures

Related bugreports: #91584

Synopsis

The libTIFF library is vulnerable to a buffer overflow, potentially resulting in the execution of arbitrary code.

2. Impact Information

Background

libTIFF provides support for reading and manipulating TIFF (Tag Image File Format) images.

Description

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a stack based buffer overflow in the libTIFF library when reading a TIFF image with a malformed BitsPerSample tag.

Impact

Successful exploitation would require the victim to open a specially crafted TIFF image, resulting in the execution of arbitrary code.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All libTIFF users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/tiff-3.7.2"

4. References

Updated May 10, 2005

Summary: This is a Gentoo Linux Security Advisory

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