libicu REStackFrames denial of service

libicu-restackframes-dos (39938) The risk level is classified as MediumMedium Risk

Description:

libicu is vulnerable to a denial of service related to corrupt REStackFrames. By sending a specially-crafted regular expression containing illegal backreference referrals to capture group zero, a local attacker could crash linked applications.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 1.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

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.

References:

  • OpenOffice.org Security Bulletin CVE-2007-4770/4771: Manipulated ODF text documents containing XForms can lead to heap overflows and arbitrary code execution.
  • OpenOffice.org Web site: download: OpenOffice.org Downloads.
  • Red Hat Bugzilla Bug 429023: CVE-2007-4770 libicu poor back reference validation.
  • SourceForge.net: Archive: [icu-support] ICU Patch for bugs in Regular Expressions.
  • Sun Alert ID: 231641: Security Vulnerability for ODF Text Documents Containing XForms in StarOffice 8/StarSuite 8.
  • Sun Alert ID: 233922: Multiple Security Vulnerabilities in ICU 3.2 Library Regular Expression Processing May Cause a Denial of Service (DoS).
  • 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-2007-4770: libicu in International Components for Unicode (ICU) 3.8.1 and earlier attempts to process backreferences to the nonexistent capture group zero (aka \0), which might allow context-dependent attackers to read from, or write to, out-of-bounds memory locations, related to corruption of REStackFrames.
  • DSA-1511: libicu -- various
  • 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

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
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • Novell Linux Desktop 9
  • Novell OpenSUSE 10.2
  • Novell OpenSUSE 10.3
  • Novell SLE SDK 10
  • 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
  • OpenOffice OpenOffice.org 2.3
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5.1.z EUS
  • Sun Solaris 10 x86
  • Sun Solaris 10 SPARC
  • Sun Solaris 9 SPARC
  • Sun Solaris 9 x86
  • Sun StarOffice 8.0
  • Sun StarSuite 8.0

Reported:

Jan 22, 2008

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