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CVE-2011-2895

Status Candidate

Overview

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.

Related Files

Apple Security Advisory 2015-12-08-4
Posted Dec 10, 2015
Authored by Apple | Site apple.com

Apple Security Advisory 2015-12-08-4 - watchOS 2.1 is now available and addresses 30 security issues.

tags | advisory
systems | apple
advisories | CVE-2011-2895, CVE-2015-6978, CVE-2015-6979, CVE-2015-6997, CVE-2015-7001, CVE-2015-7038, CVE-2015-7039, CVE-2015-7040, CVE-2015-7041, CVE-2015-7042, CVE-2015-7043, CVE-2015-7046, CVE-2015-7047, CVE-2015-7053, CVE-2015-7054, CVE-2015-7059, CVE-2015-7060, CVE-2015-7061, CVE-2015-7064, CVE-2015-7066, CVE-2015-7068, CVE-2015-7072, CVE-2015-7073, CVE-2015-7075, CVE-2015-7083, CVE-2015-7084, CVE-2015-7105, CVE-2015-7111
MD5 | 5a1f097d48a4e27260c82597b2380f98
Apple Security Advisory 2015-12-08-2
Posted Dec 10, 2015
Authored by Apple | Site apple.com

Apple Security Advisory 2015-12-08-2 - tvOS 9.1 is now available and addresses 48 security issues.

tags | advisory
systems | apple
advisories | CVE-2011-2895, CVE-2015-3807, CVE-2015-7001, CVE-2015-7038, CVE-2015-7039, CVE-2015-7040, CVE-2015-7041, CVE-2015-7042, CVE-2015-7043, CVE-2015-7045, CVE-2015-7046, CVE-2015-7047, CVE-2015-7048, CVE-2015-7051, CVE-2015-7053, CVE-2015-7054, CVE-2015-7055, CVE-2015-7058, CVE-2015-7059, CVE-2015-7060, CVE-2015-7061, CVE-2015-7062, CVE-2015-7064, CVE-2015-7065, CVE-2015-7066, CVE-2015-7068, CVE-2015-7072, CVE-2015-7073
MD5 | 8a2ae29250899c9633bdf7da2fde1fc8
Apple Security Advisory 2015-12-08-3
Posted Dec 10, 2015
Authored by Apple | Site apple.com

Apple Security Advisory 2015-12-08-3 - OS X El Capitan 10.11.2 and Security Update 2015-008 is now available and addresses 54 vulnerabilities.

tags | advisory, vulnerability
systems | apple, osx
advisories | CVE-2011-2895, CVE-2012-0876, CVE-2012-1147, CVE-2012-1148, CVE-2015-3807, CVE-2015-5333, CVE-2015-5334, CVE-2015-6908, CVE-2015-7001, CVE-2015-7038, CVE-2015-7039, CVE-2015-7040, CVE-2015-7041, CVE-2015-7042, CVE-2015-7043, CVE-2015-7044, CVE-2015-7045, CVE-2015-7046, CVE-2015-7047, CVE-2015-7052, CVE-2015-7053, CVE-2015-7054, CVE-2015-7058, CVE-2015-7059, CVE-2015-7060, CVE-2015-7061, CVE-2015-7062, CVE-2015-7063
MD5 | a3dfdb84b85b00741b1c089a33944dfe
Apple Security Advisory 2015-12-08-1
Posted Dec 10, 2015
Authored by Apple | Site apple.com

Apple Security Advisory 2015-12-08-1 - iOS 9.2 is now available and addresses at least 50 security vulnerabilities.

tags | advisory, vulnerability
systems | cisco, apple, ios
advisories | CVE-2011-2895, CVE-2015-3807, CVE-2015-7001, CVE-2015-7037, CVE-2015-7038, CVE-2015-7039, CVE-2015-7040, CVE-2015-7041, CVE-2015-7042, CVE-2015-7043, CVE-2015-7046, CVE-2015-7047, CVE-2015-7048, CVE-2015-7050, CVE-2015-7051, CVE-2015-7053, CVE-2015-7054, CVE-2015-7055, CVE-2015-7058, CVE-2015-7064, CVE-2015-7065, CVE-2015-7066, CVE-2015-7068, CVE-2015-7069, CVE-2015-7070, CVE-2015-7072, CVE-2015-7073, CVE-2015-7074
MD5 | 535e5b02b56c7bff16123b76b7d9b580
Gentoo Linux Security Advisory 201402-23
Posted Feb 22, 2014
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201402-23 - Multiple vulnerabilities have been found in libXfont, the worst of which allow for local privilege escalation. Versions less than 1.4.7 are affected.

tags | advisory, local, vulnerability
systems | linux, gentoo
advisories | CVE-2011-2895, CVE-2013-6462
MD5 | d38df16aa06a3b4cad213b6046b4a1c8
Apple Security Advisory 2012-05-09-1
Posted May 10, 2012
Authored by Apple | Site apple.com

Apple Security Advisory 2012-05-09-1 - OS X Lion v10.7.4 and Security Update 2012-002 is now available and addresses multiple security issues. An issue existed in the handling of network account logins. The login process recorded sensitive information in the system log, where other users of the system could read it. A temporary file race condition issue existed in blued's initialization routine. There are known attacks on the confidentiality of SSL 3.0 and TLS 1.0 when a cipher suite uses a block cipher in CBC mode. curl disabled the 'empty fragment' countermeasure which prevented these attacks. This issue is addressed by enabling empty fragments. A data injection issue existed in curl's handling of URLs. This issue is addressed through improved validation of URLs. This issue does not affect systems prior to OS X Lion. Various other vulnerabilities have been addressed.

tags | advisory, vulnerability
systems | apple, osx
advisories | CVE-2011-0241, CVE-2011-1004, CVE-2011-1005, CVE-2011-1167, CVE-2011-1777, CVE-2011-1778, CVE-2011-1944, CVE-2011-2692, CVE-2011-2821, CVE-2011-2834, CVE-2011-2895, CVE-2011-3212, CVE-2011-3328, CVE-2011-3389, CVE-2011-3919, CVE-2011-4566, CVE-2011-4815, CVE-2011-4885, CVE-2012-0036, CVE-2012-0642, CVE-2012-0649, CVE-2012-0651, CVE-2012-0652, CVE-2012-0654, CVE-2012-0655, CVE-2012-0656, CVE-2012-0657, CVE-2012-0658
MD5 | 9614673327dc336467f1b3577177a46e
Apple Security Advisory 2012-02-01-1
Posted Feb 3, 2012
Authored by Apple | Site apple.com

Apple Security Advisory 2012-02-01-1 - Apple has addressed 48 security vulnerabilities. These issues existed in packages such as Address Book, Apache, CFNetwork, ColorSync, CoreAudio, CoreMedia, CoreText, curl and much more.

tags | advisory, vulnerability
systems | apple
advisories | CVE-2010-1637, CVE-2010-2813, CVE-2010-4554, CVE-2010-4555, CVE-2011-0200, CVE-2011-0241, CVE-2011-1148, CVE-2011-1167, CVE-2011-1657, CVE-2011-1752, CVE-2011-1783, CVE-2011-1921, CVE-2011-1938, CVE-2011-2023, CVE-2011-2192, CVE-2011-2202, CVE-2011-2204, CVE-2011-2483, CVE-2011-2895, CVE-2011-2937, CVE-2011-3182, CVE-2011-3189, CVE-2011-3246, CVE-2011-3248, CVE-2011-3249, CVE-2011-3250, CVE-2011-3252, CVE-2011-3256
MD5 | 8fe868bea54053b8adeccaecf10eb251
Red Hat Security Advisory 2011-1834-01
Posted Dec 19, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1834-01 - The libXfont packages provide the X.Org libXfont runtime library. X.Org is an open source implementation of the X Window System. A buffer overflow flaw was found in the way the libXfont library, used by the X.Org server, handled malformed font files compressed using UNIX compress. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server. Users of libXfont should upgrade to these updated packages, which contain a backported patch to resolve this issue. All running X.Org server instances must be restarted for the update to take effect.

tags | advisory, overflow, arbitrary, local
systems | linux, redhat, unix
advisories | CVE-2011-2895
MD5 | 78fad8dcd5573adc0f07e6f8ab3bb323
Mandriva Linux Security Advisory 2011-167
Posted Nov 4, 2011
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2011-167 - A vulnerability has been discovered and corrected in gimp. The LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS before 1.4.7, the LZWReadByte function in plug-ins/common/file-gif-load.c in GIMP 2.6.11 and earlier, the LZWReadByte function in img/gifread.c in XPCE in SWI-Prolog 5.10.4 and earlier, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows remote attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream. The updated packages have been patched to correct these issues.

tags | advisory, remote, overflow, arbitrary
systems | linux, mandriva
advisories | CVE-2006-1168, CVE-2011-2895, CVE-2011-2896
MD5 | 43d3a601620ea4acfe538f60f23b6e9a
Mandriva Linux Security Advisory 2011-153
Posted Oct 17, 2011
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2011-153 - The LZW decompressor in the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD, 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 and CVE-2011-2896. The updated packages have been patched to correct this issue.

tags | advisory, overflow, arbitrary
systems | linux, netbsd, freebsd, openbsd, mandriva
advisories | CVE-2011-2895
MD5 | dec74fce09c274fbef2d8deee7b11b65
FreeBSD Security Advisory - compress Boundary Checks
Posted Sep 28, 2011
Site security.freebsd.org

FreeBSD Security Advisory - The code used to decompress a file created by compress(1) does not do sufficient boundary checks on compressed code words, allowing reference beyond the decompression table, which may result in a stack overflow or an infinite loop when the decompressor encounters a corrupted file.

tags | advisory, overflow
systems | freebsd
advisories | CVE-2011-2895
MD5 | 2da0f0fb844d408727730142ea5b6caa
Red Hat Security Advisory 2011-1161-01
Posted Aug 16, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1161-01 - FreeType is a free, high-quality, portable font engine that can open and manage font files. It also loads, hints, and renders individual glyphs efficiently. These packages provide both the FreeType 1 and FreeType 2 font engines. A buffer overflow flaw was found in the way the FreeType library handled malformed font files compressed using UNIX compress. If a user loaded a specially-crafted compressed font file with an application linked against FreeType, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application.

tags | advisory, overflow, arbitrary
systems | linux, redhat, unix
advisories | CVE-2011-2895
MD5 | a525467345d29e7eb451338506ad8027
Ubuntu Security Notice USN-1191-1
Posted Aug 15, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1191-1 - Tomas Hoger discovered that libXfont incorrectly handled certain malformed compressed fonts. An attacker could use a specially crafted font file to cause libXfont to crash, or possibly execute arbitrary code in order to gain privileges.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2011-2895
MD5 | 83d8ad013ca7fff6daec476e435e0148
Debian Security Advisory 2293-1
Posted Aug 13, 2011
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2293-1 - Tomas Hoger found a buffer overflow in the X.Org libXfont library, which may allow for a local privilege escalation through crafted font files.

tags | advisory, overflow, local
systems | linux, debian
advisories | CVE-2011-2895
MD5 | e253916d4b8e2a73d65316c577e8fa03
Red Hat Security Advisory 2011-1155-01
Posted Aug 12, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1155-01 - X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. These xorg-x11 packages also provide the X.Org libXfont runtime library. A buffer overflow flaw was found in the way the libXfont library, used by the X.Org server, handled malformed font files compressed using UNIX compress. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server.

tags | advisory, overflow, arbitrary, local
systems | linux, redhat, unix
advisories | CVE-2011-2895
MD5 | 8569eac9227112199f413bc5b55622e0
Red Hat Security Advisory 2011-1154-01
Posted Aug 12, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1154-01 - The libXfont packages provide the X.Org libXfont runtime library. X.Org is an open source implementation of the X Window System. A buffer overflow flaw was found in the way the libXfont library, used by the X.Org server, handled malformed font files compressed using UNIX compress. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server. Users of libXfont should upgrade to these updated packages, which contain a backported patch to resolve this issue. All running X.Org server instances must be restarted for the update to take effect.

tags | advisory, overflow, arbitrary, local
systems | linux, redhat, unix
advisories | CVE-2011-2895
MD5 | c58436135dd3fc042c47d8e20b899db3
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