[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Tue, 28 Feb 2012 09:09:26 -0700
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE request -- kernel: cifs: dentry refcount leak
when opening a FIFO on lookup leads to panic on unmount
On 02/28/2012 08:15 AM, Petr Matousek wrote:
> The cifs code will attempt to open files on lookup under certain
> circumstances. What happens though if we find that the file we opened
> was actually a FIFO or other special file? Currently, the open
> filehandle just ends up being leaked leading to a dentry refcount
> mismatch and oops on umount.
>
> An unprivileged local user could use this flaw to crash the system.
>
> Introduced by:
> a6ce4932fbdbcd8f8e8c6df76812014351c32892 (Linux kernel 2.6.31)
>
> Proposed upstream patch:
> http://thread.gmane.org/gmane.linux.kernel.cifs/5526
>
> References:
> https://bugzilla.redhat.com/show_bug.cgi?id=798293
> http://thread.gmane.org/gmane.linux.kernel.cifs/5526
>
> Thanks,
Please use CVE-2012-1090 for this issue.
--
Kurt Seifried Red Hat Security Response Team (SRT)
Powered by blists - more mailing lists
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.
