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MIRC Nick Buffer Overflow Vulnerability
mIRC is a popular Internet Relay Chat client whichs runs of Microsoft Windows 9x/ME/NT/2000/XP operating systems. A remote exploitable buffer overflow condition has been discovered in mIRC. This issue is due to improper bounds checking of nicknames sent by the server. A excessively long nickname (200+) is capable of overwriting stack variables. This may be exploited by a malicious server. This issue is also exploitable via a webpage that can instruct the client to launch and to make a connection to the malicious server. This may lead to a full compromise of the host running the client software on some Windows systems. |
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