A vulnerability has been reported in Yahoo! Messenger, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an error in the YMailAttach ActiveX control when handling the TextETACalculating property. This can be exploited to cause a heap-based buffer overflow by setting an overly long string to the said property.
Successful exploitation allows execution of arbitrary code and requires that the user is e.g. tricked into visiting a malicious web site.
The vulnerability is reported in version 8.0 and 7.5. Other versions may also be affected.
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Subject: Yahoo! Messenger YMailAttach ActiveX Control Buffer Overflow
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