CVE-2011-2895

BSD compress LZW decoder buffer overflow

Severity Score

9.3

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El descompresor en LZW en (1) la función BufCompressedFill en fontfile/decompress.c en X.Org libXfont antes de la versión v1.4.4 y (2) compress/compress.c en 4.3BSD, tal y como se utiliza en zopen.c en OpenBSD antes de la versión v3.8, FreeBSD, NetBSD, FreeType v2.1.9, y otros productos, no controla correctamente las palabras de código ausentes de la tabla de descompresión, lo que permite provocar un bucle infinito o un desbordamiento de búfer basado en memoria dinámica (heap) a atacantes (dependiendo del contexto) y posiblemente ejecutar código de su elección a través de un flujo comprimido debidamente modificado. Se trata de un problema relacionado con los CVE-2006-1168 y CVE-2011 2896.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2011-07-27 CVE Reserved
2011-08-12 CVE Published
2024-05-28 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (39)

URL	Tag	Source
http://secunia.com/advisories/45986	Third Party Advisory
http://secunia.com/advisories/46127	Third Party Advisory
http://secunia.com/advisories/48951	Third Party Advisory
http://securitytracker.com/id?1025920	Vdb Entry
http://support.apple.com/kb/HT5130	X_refsource_confirm
http://support.apple.com/kb/HT5281	X_refsource_confirm
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/compress/zopen.c#rev1.17	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2011/08/10/10	Mailing List
http://www.securityfocus.com/bid/49124	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/69141	Vdb Entry
https://support.apple.com/HT205635	X_refsource_confirm
https://support.apple.com/HT205637	X_refsource_confirm
https://support.apple.com/HT205640	X_refsource_confirm
https://support.apple.com/HT205641	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC
http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d11ee5886e9d9ec610051a206b135a4cdc1e09a0	2017-08-29
http://lists.freedesktop.org/archives/xorg-announce/2011-August/001721.html	2017-08-29
http://lists.freedesktop.org/archives/xorg-announce/2011-August/001722.html	2017-08-29
https://bugzilla.redhat.com/show_bug.cgi?id=725760	2017-08-29

URL	Date	SRC
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-007.txt.asc	2017-08-29
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html	2017-08-29
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html	2017-08-29
http://lists.apple.com/archives/security-announce/2015/Dec/msg00000.html	2017-08-29
http://lists.apple.com/archives/security-announce/2015/Dec/msg00001.html	2017-08-29
http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html	2017-08-29
http://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00019.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00004.html	2017-08-29
http://secunia.com/advisories/45544	2017-08-29
http://secunia.com/advisories/45568	2017-08-29
http://secunia.com/advisories/45599	2017-08-29
http://www.debian.org/security/2011/dsa-2293	2017-08-29
http://www.mandriva.com/security/advisories?name=MDVSA-2011:153	2017-08-29
http://www.redhat.com/support/errata/RHSA-2011-1154.html	2017-08-29
http://www.redhat.com/support/errata/RHSA-2011-1155.html	2017-08-29
http://www.redhat.com/support/errata/RHSA-2011-1161.html	2017-08-29
http://www.redhat.com/support/errata/RHSA-2011-1834.html	2017-08-29
http://www.ubuntu.com/usn/USN-1191-1	2017-08-29
https://bugzilla.redhat.com/show_bug.cgi?id=727624	2011-12-19
https://access.redhat.com/security/cve/CVE-2011-2895	2011-12-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Freetype Search vendor "Freetype"		Freetype Search vendor "Freetype" for product "Freetype"				2.1.9 Search vendor "Freetype" for product "Freetype" and version "2.1.9"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				<= 1.4.3 Search vendor "X" for product "Libxfont" and version " <= 1.4.3"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.0 Search vendor "X" for product "Libxfont" and version "1.2.0"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.1 Search vendor "X" for product "Libxfont" and version "1.2.1"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.2 Search vendor "X" for product "Libxfont" and version "1.2.2"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.3 Search vendor "X" for product "Libxfont" and version "1.2.3"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.4 Search vendor "X" for product "Libxfont" and version "1.2.4"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.5 Search vendor "X" for product "Libxfont" and version "1.2.5"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.6 Search vendor "X" for product "Libxfont" and version "1.2.6"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.7 Search vendor "X" for product "Libxfont" and version "1.2.7"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.8 Search vendor "X" for product "Libxfont" and version "1.2.8"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.2.9 Search vendor "X" for product "Libxfont" and version "1.2.9"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.3.0 Search vendor "X" for product "Libxfont" and version "1.3.0"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.3.1 Search vendor "X" for product "Libxfont" and version "1.3.1"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.3.2 Search vendor "X" for product "Libxfont" and version "1.3.2"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.3.3 Search vendor "X" for product "Libxfont" and version "1.3.3"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.3.4 Search vendor "X" for product "Libxfont" and version "1.3.4"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.4.0 Search vendor "X" for product "Libxfont" and version "1.4.0"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.4.1 Search vendor "X" for product "Libxfont" and version "1.4.1"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.4.2 Search vendor "X" for product "Libxfont" and version "1.4.2"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				*		-		Affected
Netbsd Search vendor "Netbsd"		Netbsd Search vendor "Netbsd" for product "Netbsd"				*		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				<= 3.7 Search vendor "Openbsd" for product "Openbsd" and version " <= 3.7"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.0 Search vendor "Openbsd" for product "Openbsd" and version "2.0"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.1 Search vendor "Openbsd" for product "Openbsd" and version "2.1"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.2 Search vendor "Openbsd" for product "Openbsd" and version "2.2"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.3 Search vendor "Openbsd" for product "Openbsd" and version "2.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.4 Search vendor "Openbsd" for product "Openbsd" and version "2.4"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.5 Search vendor "Openbsd" for product "Openbsd" and version "2.5"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.6 Search vendor "Openbsd" for product "Openbsd" and version "2.6"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.7 Search vendor "Openbsd" for product "Openbsd" and version "2.7"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.8 Search vendor "Openbsd" for product "Openbsd" and version "2.8"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				2.9 Search vendor "Openbsd" for product "Openbsd" and version "2.9"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.0 Search vendor "Openbsd" for product "Openbsd" and version "3.0"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.1 Search vendor "Openbsd" for product "Openbsd" and version "3.1"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.2 Search vendor "Openbsd" for product "Openbsd" and version "3.2"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.3 Search vendor "Openbsd" for product "Openbsd" and version "3.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.4 Search vendor "Openbsd" for product "Openbsd" and version "3.4"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.5 Search vendor "Openbsd" for product "Openbsd" and version "3.5"		-		Affected
Openbsd Search vendor "Openbsd"		Openbsd Search vendor "Openbsd" for product "Openbsd"				3.6 Search vendor "Openbsd" for product "Openbsd" and version "3.6"		-		Affected