Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Fri, 13 Nov 2009 15:55:24 -0500 (EST)
From: Josh Bressers <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request: kernel: bad permissions on
 megaraid_sas sysfs files

Please use CVE-2009-3889 for this.



----- "Eugene Teo" <> wrote:

> 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:
> The poll_mode_io pseudofile still has world-writable permissions 
> upstream. I'm getting my colleague to submit a patch.
> 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.