libicu doInterval buffer overflow

libicu-dointerval-bo (39936)

High Risk

Description:

libicu (International Components for Unicode library) is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the doInterval function. By sending a specially-crafted regular expression to the backtracking stack, a local attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges or cause linked applications to crash.

Platforms Affected:

• Canonical, Ubuntu 6.06 LTS
• Canonical, Ubuntu 6.10
• Canonical, Ubuntu 7.04
• Canonical, Ubuntu 7.10
• Debian, Debian Linux 4.0
• Gentoo, Linux
• ICU, International Components for Unicode 3.8.1
• Mandriva, Linux 2008.0
• Mandriva, Linux 2008.0 X86_64
• Novell, Linux Desktop 9
• Novell, OpenSUSE 10.2
• Novell, OpenSUSE 10.3
• Novell, SLE SDK 10 SP1
• Novell, SUSE Linux Enterprise Desktop 10 SP1
• OpenOffice, OpenOffice.org 2.0
• OpenOffice, OpenOffice.org 2.1
• OpenOffice, OpenOffice.org 2.2.0
• OpenOffice, OpenOffice.org 2.3.0
• RedHat, Enterprise Linux 5 Client
• RedHat, Enterprise Linux 5 Client Workstation
• RedHat, Enterprise Linux 5
• Sun, Solaris 10 SPARC
• Sun, Solaris 10 x86
• Sun, Solaris 9.0 SPARC
• Sun, Solaris 9.0 x86
• Sun, StarOffice 8.0
• Sun, StarSuite 8.0
• SuSE, SLE SDK 10

Remedy:

Refer to the SourceForge.net: Archive for patch, upgrade or suggested workaround information. See References.

For Open Office:
Upgrade to the latest version of Open Office (2.4 or later), available from the Open Office Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

Consequences:

Gain Privileges

References:

• OpenOffice.org Security Bulletin CVE-2007-4770/4771, Manipulated ODF text documents containing XForms can lead to heap overflows and arbitrary code execution at http://www.openoffice.org/security/cves/CVE-2007-4770.html.
• OpenOffice.org Web site, download: OpenOffice.org Downloads at http://download.openoffice.org/.
• Red Hat Bugzilla Bug 429025, CVE-2007-4771 libicu incomplete interval handling at https://bugzilla.redhat.com/show_bug.cgi?id=429025.
• SourceForge.net: Archive, [icu-support] ICU Patch for bugs in Regular Expressions at http://sourceforge.net/mailarchive/message.php?msg_name=d03a2ffb0801221538x68825e42xb4a4aaf0fcccecbd%40mail.gmail.com.
• Sun Alert ID: 231641, Security Vulnerability for ODF Text Documents Containing XForms in StarOffice 8/StarSuite 8 at http://sunsolve.sun.com/search/document.do?assetkey=1-66-231641-1.
• Sun Alert ID: 233922, Multiple Security Vulnerabilities in ICU 3.2 Library Regular Expression Processing May Cause a Denial of Service (DoS) at http://sunsolve.sun.com/search/document.do?assetkey=1-66-233922-1.
• ASA-2008-128: Multiple Security Vulnerabilities in ICU 3.2 Library Regular Expression Processing May Cause a Denial of Service (DoS) (Sun 233922)
• BID-27455: International Components for Unicode Library (libicu) Multiple Memory Corruption Vulnerabilities
• CVE-2007-4771: Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack. NOTE: some of these details are obtained from third party information.
• DSA-1511: libicu -- various
• FrSIRT/ADV-2008-0282: International Components for Unicode Regular Expressions Vulnerabilities
• FrSIRT/ADV-2008-0807: Sun Solaris ICU Library Regular Expression Denial of Service Issues
• FrSIRT/ADV-2008-1253: OpenOffice.org Data Processing Multiple Code Execution Vulnerabilities
• FrSIRT/ADV-2008-1375: Sun StarOffice/StarSuite File Handling Code Execution Vulnerabilities
• GLSA-200803-20: International Components for Unicode: Multiple vulnerabilities
• MDVSA-2008:026: Updated icu packages fix vulnerabilities
• RHSA-2008-0090: Important: icu security update
• SA28575: International Components for Unicode Regular Expressions Vulnerabilities
• SA29291: Sun Solaris ICU Regular Expressions Vulnerabilities
• SA29852: OpenOffice Multiple Vulnerabilities
• SA29987: Sun StarOffice/StarSuite Multiple Vulnerabilities
• SECTRACK ID: 1019269: ICU Regular Expression Processing Bug May Let Users Execute Arbitrary Code
• SUSE-SA:2008:023: OpenOffice.org security problems
• SUSE-SR:2008:005: SUSE Security Summary Report
• USN-591-1: libicu vulnerabilities

Reported:

Jan 22, 2008

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