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putty -- buffer overflow vulnerability in ssh2 support


There is a bug in SSH2 support that allows a server to execute malicious code on a connecting PuTTY client. This attack can be performed before host key verification happens, so a different machine -- man in the middle attack -- could fake the machine you are connecting to.



portaudit: putty -- buffer overflow vulnerability in ssh2 support

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>