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Date: Wed, 18 Aug 2010 13:59:24 +0800
From: Eugene Teo <eugene@...hat.com>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>
Subject: CVE request - kernel: xfs: stale data exposure
An issue was found in the XFS filehandle conversion where inodes that
are deleted may return as valid files as XFS does not verify the inode
numbers in the file handles, i.e. allowing access to deleted data.
The test program that demonstrates the issue via the open_by_handle
interface can be found here:
http://oss.sgi.com/archives/xfs/2010-06/msg00191.html.
[PATCH 1/4] xfs: always use iget in bulkstat
http://article.gmane.org/gmane.comp.file-systems.xfs.general/33770
[PATCH 2/4] xfs: validate untrusted inode numbers during lookup
http://article.gmane.org/gmane.comp.file-systems.xfs.general/33771
This following patch is needed too to address a regression introduced by
the patches above: http://oss.sgi.com/archives/xfs/2010-08/msg00179.html.
Reference:
https://bugzilla.redhat.com/show_bug.cgi?id=624923
Thanks, Eugene
--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }
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