ZDI-08-029: Trillian AIM.DLL Long HTML Font Parameter Stack Overflow Vulnerability May 21 2008 10:45PM
zdi-disclosures 3com com
ZDI-08-029: Trillian AIM.DLL Long HTML Font Parameter Stack Overflow



May 21, 2008

-- Affected Vendors:

Cerulean Studios

-- Affected Products:

Cerulean Studios Trillian

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 5958.

For further product information on the TippingPoint IPS, visit:


-- Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on

vulnerable installations of Trillian. User interaction is required to

exploit this vulnerability in that the target must open a malicious

image file.

The specific flaws exists during the parsing of messages with overly

long attribute values within the FONT tag. The value for any attribute

is copied into a stack based buffer via sprintf() which can result in a

buffer overrun and can be subsequently leveraged to execute arbitrary

code under the privileges of the logged in user. Exploitation may occur

over the AIM network or via direct connections.

-- Vendor Response:

Trillian v3.1.10.0 has been released to address these vulnerabilities

and is available at http://www.ceruleanstudios.com/downloads/

-- Disclosure Timeline:

2007-12-03 - Vulnerability reported to vendor

2008-05-21 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by:

* Anonymous

-- About the Zero Day Initiative (ZDI):

Established by TippingPoint, The Zero Day Initiative (ZDI) represents

a best-of-breed model for rewarding security researchers for responsibly

disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research

through the ZDI can find more information and sign-up at:


The ZDI is unique in how the acquired vulnerability information is

used. TippingPoint does not re-sell the vulnerability details or any

exploit code. Instead, upon notifying the affected product vendor,

TippingPoint provides its customers with zero day protection through

its intrusion prevention technology. Explicit details regarding the

specifics of the vulnerability are not exposed to any parties until

an official vendor patch is publicly available. Furthermore, with the

altruistic aim of helping to secure a broader user base, TippingPoint

provides this vulnerability information confidentially to security

vendors (including competitors) who have a vulnerability protection or

mitigation product.

Our vulnerability disclosure policy is available online at:


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