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critical9.3

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 us…

Impact

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.

Affected products

VendorProductAffected versions
FreetypeFreetype
Version 2.1.9
XLibxfont
through 1.4.3
Versions 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4
FreebsdFreebsd
All versions
NetbsdNetbsd
All versions
OpenbsdOpenbsd
through 3.7
Versions 2.0, 2.1, 2.2, 2.3, 2.4

Weakness classification

CWE-119

References