Trillian SSL spoofing

trillian-ssl-spoofing (79915) The risk level is classified as MediumMedium Risk

Description:

Trillian could allow a remote attacker to conduct spoofing attacks, caused by the failure to verify that the server hostname matches a domain name in the subject's Common Name (CN) field of the X.509 certificate. By persuading a victim to visit a Web site containing a specially-crafted certificate, an attacker could exploit this vulnerability using man-in-the-middle techniques to spoof an SSL server.

*CVSS:

Base Score: 4.3
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.5
  Exploitability: Unproven
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Gain Access

Remedy:

No remedy available as of October 1, 2014.

References:

  • Trillian Web site: Trillian.
  • Vitaly Shmatikov's Research Paper (University of Texas): The Most Dangerous Code in the World: Validating SSL Certificates in Non-Browser Software.
  • BID-56454: Trillian SSL Certificate Validation Security Bypass Vulnerability
  • CVE-2012-5824: Trillian 5.1.0.19 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, a different vulnerability than CVE-2009-4831.
  • SA51190: Trillian SSL Certificate Verification Security Issue

Platforms Affected:

  • Trillian Trillian 5.1.0.19

Reported:

Oct 16, 2012

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