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Category:   Application (Instant Messaging/IRC/Chat)  >   Trillian Vendors:   Cerulean Studios
Trillian Remote Stack Overflow in AIM.DLL in Parsing HTML Font Parameters Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020104
SecurityTracker URL:
CVE Reference:   CVE-2008-2407   (Links to External Site)
Updated:  May 30 2008
Original Entry Date:  May 22 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to
Description:   A vulnerability was reported in Trillian. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create an image file with specially crafted FONT tag attribute values that, when loaded by the target user, will trigger a stack overflow and execute arbitrary code on the target system. The code will run with the privileges of the target user.

The vendor was notified on December 3, 2007.

The original advisory is available at:

An anonymous reported this vulnerability via TippingPoint.

Impact:   A remote user can create a file that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fixed version (, available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  [Full-disclosure] ZDI-08-029: Trillian AIM.DLL Long HTML Font

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

-- 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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is being sent by 3Com for the sole use of the intended recipient(s) and
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Any unauthorized review, use, disclosure and/or distribution by any 
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