Rapid7 Vulnerability & Exploit Database

OS X update for X11 (CVE-2011-2895)

Back to Search

OS X update for X11 (CVE-2011-2895)

Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:C/A:C)
Published
08/19/2011
Created
07/25/2018
Added
07/16/2012
Modified
03/18/2020

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.

Solution(s)

  • apple-osx-upgrade-10_7_4

References

  • apple-osx-upgrade-10_7_4

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;