CERT warns about SSH key-based attacks

CERT has sent out an advisory on key-based attacks being used against Linux systems. "The attack appears to initially use stolen SSH keys to gain access to a system, and then uses local kernel exploits to gain root access. Once root access has been obtained, a rootkit known as 'phalanx2' is installed." There's no talk of where the original stolen keys come from. CERT's advice includes disabling key-based authentication, which, of course, runs counter to the advice given to those trying to defend against brute-force password-guessing attacks.

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