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CVE-2011-2895

9.3 · HIGH

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, F…

Published Aug 19, 2011freetypeCWE-119EPSS 8.36%

Overview

CVE-2011-2895 is a high-severity vulnerability affecting freetype freetype. It was published on August 19, 2011 and has a CVSS 2.0 base score of 9.3 (HIGH).

This vulnerability has a CVSS 2.0 base score of 9.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from freetype. Update freetype to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
xlibxfont0Affected
openbsdopenbsd0Affected

References

Refcgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d11ee5886e9d9ec610051a206b135a4cdc1e09a0Refftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-007.txt.ascReflists.apple.com/archives/security-announce/2012/Feb/msg00000.htmlReflists.apple.com/archives/security-announce/2012/May/msg00001.htmlReflists.apple.com/archives/security-announce/2015/Dec/msg00000.htmlReflists.apple.com/archives/security-announce/2015/Dec/msg00001.htmlReflists.apple.com/archives/security-announce/2015/Dec/msg00002.htmlReflists.apple.com/archives/security-announce/2015/Dec/msg00005.htmlReflists.freedesktop.org/archives/xorg-announce/2011-August/001721.htmlReflists.freedesktop.org/archives/xorg-announce/2011-August/001722.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-2895?

CVE-2011-2895 is a high-severity vulnerability affecting freetype freetype. It was published on August 19, 2011 and has a CVSS 2.0 base score of 9.3 (HIGH).

How severe is CVE-2011-2895?

This vulnerability has a CVSS 2.0 base score of 9.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-2895?

Check the references section for vendor advisories and patches from freetype. Update freetype to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-2895?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-2895 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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