Apple Mac OS X International Components for Unicode (ICU) security bypass

macosx-icu-security-bypass (42717) The risk level is classified as LowLow Risk

Description:

Apple Mac OS X could allow a remote attacker to bypass security restrictions, caused by an error in International Components for Unicode (ICU) conversions. By persuading a victim to visit a Web site containing specially-crafted character sequences, an attacker could bypass content filters to obtain sensitive information and perform cross-site scripting attacks.

*CVSS:

Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

For Apple Mac OS X:
Apply Security Update 2008-003, available from the Apple Web site. See References.

For International Components for Unicode (ICU):
Upgrade to the latest version of International Components for Unicode (ICU) (4.0 or later), available from the ICU Web Site. See References.

References:

  • Apple Web site: About the security content of Security Update 2008-003 / Mac OS X 10.5.3.
  • ICU trac Ticket #6175 : Security issue with empty segments in toUnicode converters for ISO-2022-JP, HZ, ....
  • ICU trac Ticket #6198 : Port to ICU4J: Security fix for ISO-2022-x & HZ toUnicode converters.
  • ICU Web site: ICU Home Page ?(International Components for Unicode)?.
  • BID-29412: RETIRED: Apple Mac OS X 2008-003 Multiple Security Vulnerabilities
  • BID-29488: International Components for Unicode Invalid ISO Character Handling Vulnerability
  • CVE-2008-1036: The International Components for Unicode (ICU) library in Apple Mac OS X before 10.5.3, Red Hat Enterprise Linux 5, and other operating systems omits some invalid character sequences during conversion of some character encodings, which might allow remote attackers to conduct cross-site scripting (XSS) attacks.
  • DSA-1762: icu -- insufficient input sanitising
  • RHSA-2009-0296: Moderate: icu security update
  • SA30430: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
  • SA34246: International Components for Unicode Conversion Error Security Bypass
  • SECTRACK ID: 1020139: Mac OS X ICU Character Encoding Bug Lets Remote Users Bypass Content Filters
  • USN-747-1: ICU vulnerability
  • VUPEN/ADV-2008-1697: Apple Mac OS X Command Execution and Security Bypass Issues

Platforms Affected:

  • Apple Mac OS X 10.4.11
  • Apple Mac OS X 10.5
  • Apple Mac OS X 10.5.1
  • Apple Mac OS X 10.5.2
  • Apple Mac OS X Server 10.4.11
  • Apple Mac OS X Server 10.5
  • Apple Mac OS X Server 10.5.1
  • Apple Mac OS X Server 10.5.2
  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.10
  • Canonical Ubuntu 8.04 LTS
  • Canonical Ubuntu 8.10
  • Debian Debian Linux 4.0
  • Debian Debian Linux 5.0
  • ICU International Components for Unicode 3.8.1
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5.3.z EUS
  • RedHat Enterprise Linux Long Life 5.3

Reported:

May 28, 2008

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