oss-security - Re: CVE-2009-2903 kernel: appletalk: denial of service when handling IP tunnelled over DDP datagrams

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <4AB1DF4C.2020609@redhat.com>
Date: Thu, 17 Sep 2009 15:03:40 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>, Willy Tarreau <w@....eu>
Subject: Re: CVE-2009-2903 kernel: appletalk: denial of service
 when handling IP tunnelled over DDP datagrams

Eugene Teo wrote:
> Eugene Teo wrote:
>> The check for the ipddpN device in the handle_ip_over_ddp() function 
>> returns -NODEV to the atalk_rcv() function when the device does not 
>> exist. The atalk_rcv() function then directly returns that value to 
>> its caller. There is a missing call to kfree_skb() in these unaccepted 
>> IP-DDP datagram that can exhaust the kernel memory eventually. It 
>> affects Linux hosts with appletalk and ipddp modules loaded, that are 
>> attached to the same link. Thanks to Mark Smith for reporting this 
>> issue to us.
> 
> Some updates and a quick analysis at: 
> https://bugzilla.redhat.com/CVE-2009-2903#c0 and 
> http://kbase.redhat.com/faq/docs/DOC-19069

Should be http://kbase.redhat.com/faq/docs/DOC-19077.

Thanks, Eugene

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.