Unrated severityNVD Advisory· Published Aug 19, 2011· Updated Jun 16, 2026
CVE-2011-2895
CVE-2011-2895
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
23cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*+ 17 more
- cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*range: <=3.7
- cpe:2.3:o:openbsd:openbsd:2.0:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.1:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.2:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.3:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.4:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.5:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.6:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.7:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.8:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.1:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.2:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.3:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.4:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.5:*:*:*:*:*:*:*
- cpe:2.3:o:openbsd:openbsd:3.6:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
38- cgit.freedesktop.org/xorg/lib/libXfont/commit/nvdPatch
- lists.freedesktop.org/archives/xorg-announce/2011-August/001721.htmlnvdPatch
- lists.freedesktop.org/archives/xorg-announce/2011-August/001722.htmlnvdPatch
- bugzilla.redhat.com/show_bug.cginvdPatch
- secunia.com/advisories/45544nvdVendor Advisory
- secunia.com/advisories/45568nvdVendor Advisory
- secunia.com/advisories/45599nvdVendor Advisory
- www.redhat.com/support/errata/RHSA-2011-1154.htmlnvdVendor Advisory
- www.redhat.com/support/errata/RHSA-2011-1155.htmlnvdVendor Advisory
- www.redhat.com/support/errata/RHSA-2011-1161.htmlnvdVendor Advisory
- ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-007.txt.ascnvd
- lists.apple.com/archives/security-announce/2012/Feb/msg00000.htmlnvd
- lists.apple.com/archives/security-announce/2012/May/msg00001.htmlnvd
- lists.apple.com/archives/security-announce/2015/Dec/msg00000.htmlnvd
- lists.apple.com/archives/security-announce/2015/Dec/msg00001.htmlnvd
- lists.apple.com/archives/security-announce/2015/Dec/msg00002.htmlnvd
- lists.apple.com/archives/security-announce/2015/Dec/msg00005.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2011-09/msg00019.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2011-12/msg00004.htmlnvd
- secunia.com/advisories/45986nvd
- secunia.com/advisories/46127nvd
- secunia.com/advisories/48951nvd
- securitytracker.com/idnvd
- support.apple.com/kb/HT5130nvd
- support.apple.com/kb/HT5281nvd
- www.debian.org/security/2011/dsa-2293nvd
- www.mandriva.com/security/advisoriesnvd
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/compress/zopen.cnvd
- www.openwall.com/lists/oss-security/2011/08/10/10nvd
- www.redhat.com/support/errata/RHSA-2011-1834.htmlnvd
- www.securityfocus.com/bid/49124nvd
- www.ubuntu.com/usn/USN-1191-1nvd
- bugzilla.redhat.com/show_bug.cginvd
- exchange.xforce.ibmcloud.com/vulnerabilities/69141nvd
- support.apple.com/HT205635nvd
- support.apple.com/HT205637nvd
- support.apple.com/HT205640nvd
- support.apple.com/HT205641nvd
News mentions
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