According to US-CERT, the attack appears to rely on stolen SSH keys to gain access to a system. It then uses a local kernel exploit to gain root access, whereupon it installs the "phalanx2" rootkit, derived from the older "phalanx" rootkit...
Encrypting a password using the md5 algorithm is so easy that you really have no excuse not to use it for saving passwords into your database...
While regular expressions are often used for input validation, I also find them very useful for cleaning malicious code in user input. For this I used the function preg_replace. The idea is that I only allow certain characters through...
Any input that you get from a user should be cleaned for malicious code. Here are some simple functions that will help... |
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