Another major Putty security hole has been patched... (yeah, 2 in 3 months :( )
From the Putty website:
2004-10-26 ANOTHER SECURITY HOLE, fixed in PuTTY 0.56
PuTTY 0.56, released today, fixes a serious security hole which can allow a server to execute code of its choice on a PuTTY client connecting to it. In SSH2, the attack can be performed before host key verification, meaning that even if you trust the server you think you are connecting to, a different machine could be impersonating it and could launch the attack before you could tell the difference. We recommend everybody upgrade to 0.56 as soon as possible.
That's two really bad holes in three months. I'd like to apologise to all our users for the inconvenience.
Further details are available from iDEFENSE, here (<invalid hyperlink removed by admin>).