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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-5824
• https://exchange.xforce.ibmcloud.com/vulnerabilities/79915
• http://secunia.com/advisories/51190
• http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
• http://www.securityfocus.com/bid/56454