Gianni Amato has discovered a weakness in Yahoo! Messenger, which can be exploited by malicious people to cause a DoS (Denial of Service).
The weakness is caused due to a NULL pointer dereference error when processing received conference invites. This can be exploited to crash arbitrary users' Yahoo! Messenger clients by sending a Conference Invite packet containing a specially crafted "room name" string.
The vulnerability is confirmed in version 18.104.22.1686. Other versions may also be affected.
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Subject: Yahoo! Messenger Conference Invite Denial of Service
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