Post subject: Latest proftpd causing extremely high load
Posted: Wed Mar 09, 2011 8:19 am
Joined: Tue Dec 22, 2009 5:53 am Posts: 6 Location: Athens, Greece
I've been experiencing a very strange issue after the whole proftpd remote root exploit fuss: every user connected via FTP consumes a humongous amount of CPU time and memory (to the point where an 8 GB RAM server started swapping because of the proftpd processes) no matter what the user performs (IDLE, LIST etc).
The server is a hackenstein of RHEL 4 and CentOS 4.8, with all package conflicts resolved and has been running smoothly for over 1.5 year now. The issue has appeared with both Atomic proftpd 1.3.3c and 1.3.3d and strace is to my eyes inconclusive.
Any help would be greatly appreciated, as I don't like reverting to the vulnerable 1.3.2e (which is the latest version where proftpd runs with no issues whatsoever) for the server to operate correctly.
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