Trillian SSL Certificate Vulnerability

2010-05-02 / 2010-05-03

Credit: Gabriel Menezes Nunes

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2009-4831

CWE: CWE-20

CVSS Base Score: 5.8/10

Impact Subscore: 4.9/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: None

Trillian SSL Certificate Vulnerability

I. The Vulnerability

Trillian does not check SSL certificate before sending MSN user
credentials. An attacker is able to obtain MSN username and password
with a spoofed certificate and no alert is generated to the user.
This vulnerability was found in Trillian Basic 3.1. Other versions
and/or protocols may also be affected.

II. Disclosure Timeline

06/19/2009 - Vendor contact.
06/26/2009 - No answer. Public Disclosure.

III. Vendor

http://www.ceruleanstudios.com/

IV. Credit

Gabriel Menezes Nunes <gab.mnunes [at] gmail (dot) com>

References:

http://xforce.iss.net/xforce/xfdb/51400

http://www.securityfocus.com/bid/35509

http://www.securityfocus.com/archive/1/archive/1/504573/100/0/threaded

http://secunia.com/advisories/35620

See this note in RAW Version

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Trillian SSL Certificate Vulnerability

References:

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