[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Fri, 13 Nov 2009 14:39:24 +0800
From: Eugene Teo <eugeneteo@...nel.sg>
To: oss-security@...ts.openwall.com
CC: "Steven M. Christey" <coley@...us.mitre.org>
Subject: CVE request: kernel: bad permissions on megaraid_sas sysfs files
The megaraid_sas driver exposes a number of driver attributes in sysfs.
Many of these are read-only, just export information from the driver and
are world-readable.
A couple of attributes are writable and may be used to change the
behaviour of the driver (e.g. setting debug logging levels, selecting
poll vs. interrupt I/O mode etc).
Some of these writable attributes are mistakenly created with
world-writable permissions, e.g. dbg_lvl and poll_mode_io.
This would allow an unprivileged user to affect kernel driver behaviour
and logging level.
Upstream made the dbd_lvl permissions more restrictive:
http://git.kernel.org/linus/66dca9b8c50b5e59d3bea8b21cee5c6dae6c9c46
The poll_mode_io pseudofile still has world-writable permissions
upstream. I'm getting my colleague to submit a patch.
https://bugzilla.redhat.com/show_bug.cgi?id=526068
Thanks, Eugene
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.
