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Date: Fri, 25 Feb 2011 10:20:02 -0500
From: Steve Grubb <sgrubb@...hat.com>
To: oss-security@...ts.openwall.com
Cc: Eugene Teo <eugene@...hat.com>, Nelson Elhage <nelhage@...lice.com>
Subject: Re: CVE request: libcgroup: Failure to verify netlink messages
On Friday, February 25, 2011 12:58:13 am Eugene Teo wrote:
> On 02/25/2011 12:32 PM, Nelson Elhage wrote:
> > The cgrulesengd program from libcgroup failed to properly verify the
> > sender of netlink messages, allowing arbitrary users to spoof events
> > to the daemon, causing it to place processes into incorrect cgroups.
> >
> > Note that the default configuration of cgrulesengd does not contain
> > any any rules, so this is probably only usefully exploitable if an
> > admin have specifically configured cgrulesengd to enforce some policy.
> >
> > References:
> > http://sourceforge.net/mailarchive/message.php?msg_id=27102603
>
> Please use CVE-2011-1022.
That's a shame. I reported this same problem in November last year:
http://sourceforge.net/mailarchive/message.php?msg_id=26598749
The current patch does not check if (from_nla_len != sizeof(from_nla)) before making
decisions based on the header. I contacted upstream about this.
-Steve
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