GLSA 200706-09: libexif: Buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	libexif: Buffer overflow
Date:	06/26/2007
Bugs:	#181922
ID:	200706-09

Synopsis

libexif does not properly handle image EXIF information, possibly allowing for the execution of arbitrary code.

Background

libexif is a library for parsing, editing and saving EXIF metadata from images.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-libs/libexif	< 0.6.16	>= 0.6.16	All supported architectures

Description

iDefense Labs have discovered that the exif_data_load_data_entry() function in libexif/exif-data.c improperly handles integer data while working with an image with many EXIF components, allowing an integer overflow possibly leading to a heap-based buffer overflow.

Impact

An attacker could entice a user of an application making use of a vulnerable version of libexif to load a specially crafted image file, possibly resulting in a crash of the application or the execution of arbitrary code with the rights of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All libexif users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libexif-0.6.16"

References

CVE-2006-4168

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200706-09.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 https://bugs.gentoo.org.