Advisory Details

April 3rd, 2007

Yahoo! Messenger AudioConf ActiveX Control Buffer Overflow Vulnerability

ZDI-07-012
ZDI-CAN-110

CVE ID CVE-2007-1680
CVSS SCORE
AFFECTED VENDORS Yahoo!
AFFECTED PRODUCTS Yahoo! Messenger
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4791. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Yahoo Messenger. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists within the ActiveX control Yahoo.AudioConf:

DLL: yacscom.dll
CLSID: 2B323CD9-50E3-11D3-9466-00A0C9700498

When large values are specified for the 'socksHostname' and 'hostname' properties, and the createAndJoinConference() method is called, a stack overflow occurs. Exploitation can result in code execution under the context of the current user.

ADDITIONAL DETAILS Yahoo! has issued an update to correct this vulnerability. More details can be found at:
http://messenger.yahoo.com/security_update.php?id=031207
DISCLOSURE TIMELINE
  • 2006-10-27 - Vulnerability reported to vendor
  • 2007-04-03 - Coordinated public release of advisory
CREDIT Peter Vreugdenhil
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