A vulnerability was discovered and corrected in freetype2 :

Integer signedness error in psaux/t1decode.c in FreeType before 2.4.6, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted Type 1 font in a PDF document, as exploited in the wild in July 2011 (CVE-2011-0226).

Packages for 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149 products_id=490

The updated packages have been patched to correct this issue.

Updated freetype packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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 the FreeType 2 font engine.

A flaw was found in the way the FreeType font rendering engine processed certain PostScript Type 1 fonts. If a user loaded a specially crafted 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. (CVE-2011-0226)

Users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The X server must be restarted (log out, then log back in) for this update to take effect.

Vincent Danen reports :

Due to an error within the t1_decoder_parse_charstrings() function (src/psaux/t1decode.c) and can be exploited to corrupt memory by tricking a user into processing a specially crafted postscript Type1 font in an application that uses the freetype library.

It was discovered that insufficient input sanitising in Freetype's code to parse Type1 could lead to the execution of arbitrary code.

The remote host is affected by the vulnerability described in GLSA-201201-09 (FreeType: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in FreeType. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to open a specially crafted font,       possibly resulting in the remote execution of arbitrary code with the       privileges of the user running the application, or a Denial of Service.
  Workaround :

    There is no known workaround at this time.

The remote host is running a version of Mac OS X 10.7.x that is prior to 10.7.2. This version contains numerous security-related fixes for the following components :

  - Apache
  - Application Firewall
  - ATS
  - BIND
  - Certificate Trust Policy
  - CFNetwork
  - CoreMedia
  - CoreProcesses
  - CoreStorage
  - File Systems
  - iChat Server
  - Kernel
  - libsecurity
  - Open Directory
  - PHP
  - python
  - QuickTime
  - SMB File Server
  - X11

It was discovered that FreeType did not correctly handle certain malformed Type 1 font files. If a user were tricked into using a specially crafted font file, a remote attacker could cause FreeType to crash or possibly execute arbitrary code with user privileges.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update fixes length checks in psaux/psobjs.c.

This issue was used in one of the last jailbreakme exploits for Apple iPhone/iPad products. (CVE-2011-0226)

This update fixes CVE-2011-0226.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 6 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2011-1085 advisory.

    - Add freetype-2.3.11-CVE-2011-0226.patch         (Add better argument check for 'callothersubr'.)
        - based on patches by Werner Lemberg,           Alexei Podtelezhnikov and Matthias Drochner

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This freetype2 update fixes sign extension problems and missing length checks.

This issue was used in one of the last jailbreakme exploits for Apple iPhone/iPad products. (CVE-2011-0226)

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
55695	Mandriva Linux Security Advisory : freetype2 (MDVSA-2011:120)	Nessus	Mandriva Local Security Checks	2011/7/27	2021/1/6	high
55647	RHEL 6 : freetype (RHSA-2011:1085)	Nessus	Red Hat Local Security Checks	2011/7/22	2021/1/14	high
55822	FreeBSD : freetype2 -- execute arbitrary code or cause denial of service (5d374b01-c3ee-11e0-8aa5-485d60cb5385)	Nessus	FreeBSD Local Security Checks	2011/8/12	2021/1/6	high
55852	Debian DSA-2294-1 : freetype - missing input sanitising	Nessus	Debian Local Security Checks	2011/8/16	2021/1/11	high
57651	GLSA-201201-09 : FreeType: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2012/1/24	2021/1/6	high
56480	Mac OS X 10.7.x < 10.7.2 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	2011/10/13	2024/5/28	critical
55688	Ubuntu 10.10 / 11.04 : freetype vulnerability (USN-1173-1)	Nessus	Ubuntu Local Security Checks	2011/7/26	2019/9/19	high
55712	SuSE 11.1 Security Update : freetype2 (SAT Patch Number 4921)	Nessus	SuSE Local Security Checks	2011/7/28	2021/1/19	high
55872	Fedora 15 : freetype-2.4.4-5.fc15 (2011-9542)	Nessus	Fedora Local Security Checks	2011/8/17	2021/1/11	high
56016	Fedora 14 : freetype-2.4.2-5.fc14 (2011-9525)	Nessus	Fedora Local Security Checks	2011/8/31	2021/1/11	high
68311	Oracle Linux 6 : freetype (ELSA-2011-1085)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2024/10/22	high
75506	openSUSE Security Update : freetype2 (openSUSE-SU-2011:0852-1)	Nessus	SuSE Local Security Checks	2014/6/13	2021/1/14	high

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