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MEDIUM

David Koblas' GIF decoder LZW decoder buffer overflow

Published Aug 19, 2011

Description

The LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS before 1.4.7, the LZWReadByte function in plug-ins/common/file-gif-load.c in GIMP 2.6.11 and earlier, the LZWReadByte function in img/gifread.c in XPCE in SWI-Prolog 5.10.4 and earlier, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows remote attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2895.

Affected products

Remediation

Red Hat statement

Vulnerable. This issue affects the versions of cups as shipped with Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this issue as having moderate security impact for the cups package. A future update may address this issue in the cups package for Red Hat Enterprise Linux 4, 5, and 6. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Metrics

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (35)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Aug 19, 2011
Updated Aug 6, 2024
Reserved Jul 27, 2011
Link CVE-2011-2896
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 16, 2026
Link CVE-2011-2896
Red Hat
Severity Moderate
Public date Aug 10, 2011
Links CVE-2011-2896 - Bugzilla