Vulnerability Monitor

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CVE-2011-2895

The LZW decompressor in (1) the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and (2) compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD 4.0.x and 5.0.x before 5.0.3 and 5.1.x before 5.1.1, FreeType 2.1.9, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows context-dependent 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-2011-2896.

Published

2011-08-19T17:55:03.037

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 9.3 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

8.6

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-119
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application freetype freetype 2.1.9 Yes
Application x libxfont ≤ 1.4.3 Yes
Application x libxfont 1.2.0 Yes
Application x libxfont 1.2.1 Yes
Application x libxfont 1.2.2 Yes
Application x libxfont 1.2.3 Yes
Application x libxfont 1.2.4 Yes
Application x libxfont 1.2.5 Yes
Application x libxfont 1.2.6 Yes
Application x libxfont 1.2.7 Yes
Application x libxfont 1.2.8 Yes
Application x libxfont 1.2.9 Yes
Application x libxfont 1.3.0 Yes
Application x libxfont 1.3.1 Yes
Application x libxfont 1.3.2 Yes
Application x libxfont 1.3.3 Yes
Application x libxfont 1.3.4 Yes
Application x libxfont 1.4.0 Yes
Application x libxfont 1.4.1 Yes
Application x libxfont 1.4.2 Yes
Operating System freebsd freebsd * Yes
Operating System netbsd netbsd * Yes
Operating System openbsd openbsd ≤ 3.7 Yes
Operating System openbsd openbsd 2.0 Yes
Operating System openbsd openbsd 2.1 Yes
Operating System openbsd openbsd 2.2 Yes
Operating System openbsd openbsd 2.3 Yes
Operating System openbsd openbsd 2.4 Yes
Operating System openbsd openbsd 2.5 Yes
Operating System openbsd openbsd 2.6 Yes
Operating System openbsd openbsd 2.7 Yes
Operating System openbsd openbsd 2.8 Yes
Operating System openbsd openbsd 2.9 Yes
Operating System openbsd openbsd 3.0 Yes
Operating System openbsd openbsd 3.1 Yes
Operating System openbsd openbsd 3.2 Yes
Operating System openbsd openbsd 3.3 Yes
Operating System openbsd openbsd 3.4 Yes
Operating System openbsd openbsd 3.5 Yes
Operating System openbsd openbsd 3.6 Yes
References