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Date: Mon, 6 Jun 2011 14:28:54 -0400 (EDT)
From: Josh Bressers <>
Cc: Chris Evans <>, Greg KH <>,
        Kees Cook <>,
        "Steven M. Christey" <>
Subject: Re: CVE Request -- vsftpd -- Do not create network
 namespace per connection

----- Original Message -----
> Hello, Josh, Steve, vendors,
> It was found that vsftpd, Very Secure FTP daemon, when the network
> namespace (CONFIG_NET_NS) support was activated in the kernel, used to
> create a new network namespace per connection. A remote attacker could
> use this flaw to cause a memory pressure and denial of the vsftpd
> service.
> References:
> [1]
> [2]
> [3]
> This one being a bit tricky one -- from my understanding of the issue,
> vsftpd doesn't necessarily have a security flaw on its side. It's
> kernel issue / bug, which allows this to be used for vsftpd DoS:
> [4]
> [5]
> Short-term solution would be probably to address this on the vsftpd
> side, the long-term one then being to get this fixed in kernel.
> Though not sure, how it would be wrt to CVE identifier(s) assignment.

I'm going to assign CVE-2011-2189 for the kernel. There are numerous
vendors shipping this bug.

I'll leave it up to MITRE if they think vsftpd should get an ID. I don't
think it should myself, but they understand these corner cases better than



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