GLSA 200511-03: giflib: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	giflib: Multiple vulnerabilities
Date:	11/04/2005
Bugs:	#109997
ID:	200511-03

Synopsis

giflib may dereference NULL or write out of bounds when processing malformed images, potentially resulting in Denial of Service or arbitrary code execution.

Background

giflib is a library for reading and writing GIF images.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-libs/giflib	< 4.1.4	>= 4.1.4	All supported architectures

Description

Chris Evans and Daniel Eisenbud independently discovered two out-of-bounds memory write operations and a NULL pointer dereference in giflib.

Impact

An attacker could craft a malicious GIF image and entice users to load it using an application making use of the giflib library, resulting in an application crash or potentially the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All giflib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/giflib-4.1.4"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200511-03.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.