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giflib: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200511-03 / giflib
Release Date November 04, 2005
Latest Revision November 04, 2005: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
media-libs/giflib < 4.1.4 >= 4.1.4 All supported architectures

Related bugreports: #109997


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

2.  Impact Information


giflib is a library for reading and writing GIF images.


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


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.

3.  Resolution Information


There is no known workaround at this time.


All giflib users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4.  References


Page updated November 04, 2005

Summary: This is a Gentoo Linux Security Advisory

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