BlackBerry Device Software certificate spoofing

blackberry-device-certificate-spoofing (53490) The risk level is classified as MediumMedium Risk

Description:

BlackBerry Device Software could allow a remote attacker to conduct spoofing attacks, caused by the failure to show NULL characters in the dialog box when a mismatched certificate is detected. By persuading a victim to visit a Web site containing a specially-crafted certificate with NULL characters in the Common Name (CN) field, a remote attacker could exploit this vulnerability to cause the victim to accept spoofed certificates.

*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:

Gain Access

Remedy:

Refer to Blackberry Security Advisory KB19552 for patch, upgrade or suggested workaround information. See References.

References:

  • Blackberry Security Advisory KB19552: BlackBerry Browser dialog box does not clearly indicate mismatches between web site domain names and associated certificates.
  • BID-36528: BlackBerry Device Software Browser Dialog Box Certificate Mismatch Weakness
  • CVE-2009-3477: The Blackberry Browser in RIM BlackBerry Device Software 4.5.0 before 4.5.0.173, 4.6.0 before 4.6.0.303, 4.6.1 before 4.6.1.309, 4.7.0 before 4.7.0.179, and 4.7.1 before 4.7.1.57 does not properly handle hidden characters including a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows remote man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
  • SA36875: BlackBerry Devices Insufficient Certificate Warning Security Issue
  • SECTRACK ID: 1022951: Blackberry OS NULL Character Flaw in Common Name Field Lets Remote Users Spoof Certficiates

Platforms Affected:

  • RIM BlackBerry Software 4.5
  • RIM BlackBerry Software 4.6
  • RIM BlackBerry Software 4.6.1
  • RIM BlackBerry Software 4.7
  • RIM BlackBerry Software 4.7.1

Reported:

Sep 28, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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