Runaway ProFTP?

[Ryan Coleman]

I have not been able to get portsnap to work at all today.


On Dec 10, 2010, at 10:53 PM, Grant Peel wrote:

> ----- 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.
>> 
>> Jerry
>> 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.
>>>> 
>>>> Thanks,
>>>> Ryan
>>>> 
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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.
> 
> -Grant 
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