Date: Tue, 26 Mar 2002 07:14:31 +1100
From: Joe Dollard <[email protected]>
To: [email protected]Subject: DoS in debian (potato) proftpd
Hi guys,
The version of proftp that is in debian potato (1.2.0pre10 as reported by running 'proftpd -v ') is vulnerable to a glob DoS attack, as discovered on the 15th March 2001. You can verify this bug by logging in to a server running debian stable's proftpd and type "ls */../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*". This results with 100% of the CPU and memory resources being consumed (more info at http://proftpd.linux.co.uk/critbugs.html),
A temporary workaround for this issue is to add DenyFilter \*.*/ into your proftp configuration file.
I notifed [email protected] on the 12th of February (2002) about this problem and a discussion was entered into but no resolution occurred. I contacted [email protected] again on the 21st of FEbruary and didn't receive a reply. After posting to [email protected] on the 1st of March, I was told on the 7th of March that the package maintainer was working on a fix. Now, over a year after the bug has been discovered, and over 5 weeks since I first contacted debian about it, no fix is in place in
debian potato. Hopefully posting here will speed things up a bit.
Regards,
Joe Dollard
