CVE-2011-2895

Publication date 11 August 2011

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

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.

Status

Package Ubuntu Release Status
libxfont 11.04 natty
Fixed 1:1.4.3-2ubuntu0.1
10.10 maverick
Fixed 1:1.4.2-1ubuntu0.1
10.04 LTS lucid
Fixed 1:1.4.1-1ubuntu0.1
8.04 LTS hardy Ignored end of life

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libxfont

References

Related Ubuntu Security Notices (USN)

    • USN-1191-1
    • libXfont vulnerability
    • 15 August 2011

Other references