gpeel at thenetnow.com
Sat Dec 11 04:53:12 UTC 2010
----- Original Message -----
From: "Jerry Bell" <jerry at nrdx.com>
To: <freebsd-questions at freebsd.org>
Sent: Friday, December 10, 2010 4:47 PM
Subject: Re: Runaway ProFTP?
>I have been having this happen a few times per week for the past few weeks.
>I believe it is caused by someone attacking proftpd. I noticed today that
>there is an updated version - 1.3.3c that fixes a vulnerability that they
>may have been trying to exploit.
> When I looked at the process list, I would see around 20 proftpd's, each
> with a high amount of CPU used, and connected to a specific IP. I'd
> firewall off those IPs and kill off proftpd/restart. Knock on wood, I
> have not had that happen since upgrading to 1.3.3c, but that may just be
> because no one has tried again yet.
> On 12/10/2010 4:39 PM, Ryan Coleman wrote:
>> Does anyone have any ideas?
>> On Dec 9, 2010, at 3:12 PM, Ryan Coleman wrote:
>>> Dear list,
>>> Has anyone else had experience with ProFTP 1.3.3a running away with
>>> processes? I installed it about 2 months ago with a new server build and
>>> over the course of the last three weeks I've had to forcibly kill, wait
>>> and restart the service every one-to-three days and sucking up between
>>> 20% and 80% of my system resources.
>>> I've attempted to change the logging in hopes to track down what is
>>> causing the problems but I have not been successful. Additionally it
>>> won't connect after a restart through Filezilla but using Terminal on my
>>> MBP it will connect in the CLI.
>>> It's not the end of the world (for me) but it is for my staff when they
>>> have to upload large numbers of photos.
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Indeed, this Proftpd 1.3.3a vulnerability is exactly what my post on
upgrading a single port is all about. I can say for a fact that the botnets
are trying to use the vulnerability and that you are quite correct that the
CPU / ZOMBIE processes are exploit related.
I just upgraded today and so far so good.
\FYI for anyone that is following my thread on updating one single port: I
must have a somwhat busted installation. Using port upgrade failed ... sorry
I did not remember to keep the output, but, I was able to download the
source from proftpd.org and install it from scratch.
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