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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0289 -- [Win] Cerulean Studios Trillian Multiple IRC Vulnerabilities 25 June 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Trillian 3.1 Publisher: iDEFENSE Operating System: Windows Impact: Execute Arbitrary Code/Commands Access Confidential Data Access: Remote/Unauthenticated CVE Names: CVE-2007-2478 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=545 Revision History: June 25 2007: Added CVE Name May 2 2007: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cerulean Studios Trillian Multiple IRC Vulnerabilities iDefense Security Advisory 04.30.07 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 30, 2007 I. BACKGROUND Cerulean Studios Trillian is a multi-protocol chat application that supports IRC, ICQ, AIM and MSN protocols. More information can be found on the vendor's site at the following URL. http://www.ceruleanstudios.com/learn/ II. DESCRIPTION Remote exploitation of multiple vulnerabilities in the Internet Relay Chat (IRC) module of Cerulean Studios' Trillian could allow for the interception of private conversations or execution of code as the currently logged on user. When handling long CTCP PING messages containing UTF-8 characters, it is possible to cause the Trillian IRC client to return a malformed response to the server. This malformed response is truncated and is missing the terminating newline character. This could allow the next line sent to the server to be improperly sent to an attacker. When a user highlights a URL in an IRC message window Trillian copies the data to an internal buffer. If the URL contains a long string of UTF-8 characters, it is possible to overflow a heap based buffer corrupting memory in a way that could allow for code execution. A heap overflow can be triggered remotely when the Trillian IRC module receives a message that contains a font face HTML tag with the face attribute set to a long UTF-8 string. III. ANALYSIS Exploitation of this vulnerability allows remote attackers to intercept private communications for Trillian IRC users or execute code with the credentials of the currently logged on user. In order to exploit the highlighted URL vulnerability, users would have to highlight the malicious URL. IV. DETECTION iDefense has confirmed the existence of this vulnerability in Cerulean Studios Trillian 3.1. V. WORKAROUND iDefense is currently unaware of any effective workaround for this issue. VI. VENDOR RESPONSE Cerulean Studios has addressed these vulnerabilities within version 3.1.5.0 of Trillian. For more information, visit their blog at the following URL. http://blog.ceruleanstudios.com/ VII. CVE INFORMATION A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet. VIII. DISCLOSURE TIMELINE 01/24/2007 Initial vendor notification 01/30/2007 Initial vendor response 04/30/2007 Coordinated public disclosure IX. CREDIT These vulnerabilities were reported to iDefense by enhalos. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2007 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customerservice@idefense.com for permission. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRn86fSh9+71yA2DNAQJESQP6A7ACk7/0+3vn1J7sYeN8uq6rccuyrxan IvTsxOgRXnzZgzFpJuAwic0aVcQbdCQVQrb6Mx0H5+WS9tYilv3mlGGm/VyJ4Lj2 ejoXB0NttcJthxZALsjpyP/7bAPatjjluKdFKFtrZPpjqiIA81oNL/byO4O6ZfYF lX+VHNnqJ1E= =32+E -----END PGP SIGNATURE-----