Yahoo! Messenger Two ActiveX Controls Buffer Overflows - Secunia Advisories - Vulnerability Intelligence

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Yahoo! Messenger Two ActiveX Controls Buffer Overflows
Secunia Advisory:	SA25547	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-06-07
Last Update:	2007-06-13
Popularity:	23,216 views

Critical:	Extremely critical
Impact:	System access
Where:	From remote
Solution Status:	Vendor Patch

Software:	Yahoo! Messenger 8.x

Binary Analysis:	BA147 :: Available for Credits BA149 :: Available for Credits

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-3147 CVE-2007-3148

Description: Danny has discovered two vulnerabilities in Yahoo! Messenger, which can be exploited by malicious people to compromise a user's system. 1) A boundary error within the Yahoo! Webcam Upload (ywcupl.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Send()" method. 2) A boundary error within the Yahoo! Webcam Viewer (ywcvwr.dll) ActiveX control can be exploited to cause a stack-based buffer overflow by assigning an overly long string to the "Server" property and then calling the "Receive()" method. Successful exploitation of the vulnerabilities allows execution of arbitrary code. The vulnerabilities are confirmed in version 8.1.0.249. Other versions may also be affected. Solution: Update to the latest version. http://messenger.yahoo.com Set the kill-bit for the affected ActiveX controls. Provided and/or discovered by: Danny Also independently discovered by: Greg Linares, eEye Digital Security. Changelog: 2007-06-08: Updated "Solution" section. Added vendor link. 2007-06-11: Added links to US-CERT and eEye Digital Security. 2007-06-13: Added CVE reference. Original Advisory: Yahoo: http://messenger.yahoo.com/security_update.php?id=060707 Full-Disclosure: http://lists.grok.org.uk/pipermail/full-disclosure/2007-June/063817.html http://lists.grok.org.uk/pipermail/full-disclosure/2007-June/063819.html eEye Digital Security: http://research.eeye.com/html/advisories/published/AD20070608.html Other References: US-CERT VU#932217: http://www.kb.cert.org/vuls/id/932217 US-CERT VU#949817: http://www.kb.cert.org/vuls/id/949817 Extended Solution: The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.

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