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Fencer Intel
medium 5.1

CVE-2011-2896 json

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 func…

published 2011-08-19 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2869

cvss
5.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
12.0%
EPSS 12.0% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

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.

Patch / fix

  • cups Debian 14, Debian 13, Debian 12 1.5.0-8
  • gimp Debian 14, Debian 13, Debian 12 2.6.11-5

debian advisories DEBIAN-CVE-2011-2896

  • gimp RHEL 5 2:2.2.13-2.0.7.el5_8.5
  • gimp-libs RHEL 5 2:2.2.13-2.0.7.el5_8.5
  • gimp RHEL 6 2:2.6.9-4.el6_3.3
  • gimp-libs RHEL 6 2:2.6.9-4.el6_3.3
  • gimp-devel-tools RHEL 6 2:2.6.9-4.el6_3.3
  • gimp-help-browser RHEL 6 2:2.6.9-4.el6_3.3
  • cups RHEL 5 1:1.3.7-30.el5
  • cups-lpd RHEL 5 1:1.3.7-30.el5

red hat advisories RHSA-2012:1181RHSA-2012:1180RHSA-2012:0302RHSA-2011:1635

  • gimp openSUSE Tumbleweed 2.8.18-1.4

opensuse advisories openSUSE-SU-2024:10294-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2896 updated cvss 4.3

David Koblas' GIF decoder LZW decoder buffer overflow

  • Red Hat Enterprise Linux 4 cups, gimp Red Hat Enterprise Linux 6 pl, ocaml, pl-jpl, ocaml-x11, ocaml-emacs, ocaml-camlp4, +4 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) cups 1.3.7-30.el5, cups-lpd 1.3.7-30.el5, cups-libs 1.3.7-30.el5, gimp 2.2.13-2.0.7.el5_8.5, gimp-libs 2.2.13-2.0.7.el5_8.5 Red Hat Enterprise Linux Desktop (v. 5 client) cups 1.3.7-30.el5, cups-lpd 1.3.7-30.el5, cups-libs 1.3.7-30.el5, gimp 2.2.13-2.0.7.el5_8.5, gimp-libs 2.2.13-2.0.7.el5_8.5
    fixed: vendor fix RHSA-2012:1181
  • Red Hat Enterprise Linux Desktop (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-lpd 1.4.2-44.el6, cups-libs 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-help-browser 2.6.9-4.el6_3.3 Red Hat Enterprise Linux Desktop Optional (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-php 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-devel-tools 2.6.9-4.el6_3.3
    fixed: vendor fix RHSA-2012:1180
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) cups 1.3.7-30.el5
    fixed: vendor fix RHSA-2012:0302
  • Red Hat Enterprise Linux HPC Node (v. 6) cups 1.4.2-44.el6, cups-lpd 1.4.2-44.el6, cups-libs 1.4.2-44.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) cups 1.4.2-44.el6, cups-php 1.4.2-44.el6
    fixed: vendor fix RHSA-2011:1635
  • Red Hat Enterprise Linux Server (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-lpd 1.4.2-44.el6, cups-libs 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-help-browser 2.6.9-4.el6_3.3 Red Hat Enterprise Linux Server Optional (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-php 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-devel-tools 2.6.9-4.el6_3.3 Red Hat Enterprise Linux Workstation (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-lpd 1.4.2-44.el6, cups-libs 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-help-browser 2.6.9-4.el6_3.3 Red Hat Enterprise Linux Workstation Optional (v. 6) cups 1.4.2-44.el6, gimp 2.6.9-4.el6_3.3, cups-php 1.4.2-44.el6, gimp-libs 2.6.9-4.el6_3.3, gimp-devel-tools 2.6.9-4.el6_3.3
    fixed: vendor fix RHSA-2012:1180
  • Red Hat RHEL Desktop Workstation (v. 5 client) gimp 2.2.13-2.0.7.el5_8.5
    fixed: vendor fix RHSA-2012:1181
  • Red Hat Enterprise Linux 4 gd, tk, php, gtk2, gdk-pixbuf Red Hat Enterprise Linux 5 gd, tk, php, gtk2, php53, gdk-pixbuf Red Hat Enterprise Linux 6 gd, tk, php, gtk2, php-gd, php-cli, +26 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

11.99% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.