Date: Thu, 17 Sep 2009 13:41:02 +0800 From: Eugene Teo <eugeneteo@...nel.sg> 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: > 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 Thanks, Eugene
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