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Date: Fri, 09 Jul 2010 07:48:44 -1000
From: akuster <akuster@...sta.com>
To: Dan Rosenberg <dan.j.rosenberg@...il.com>
CC: oss-security@...ts.openwall.com
Subject: Re: kernel: gfs2 acl issue

Dan,

Is 2.6.32 the earliest kernel showing the problem or just what was tested?

Regards,
Armin

On 07/08/2010 05:56 PM, Dan Rosenberg wrote:
> To elaborate on the issue: the gfs2 filesystem in 2.6.32 kernels
> currently allows any user to set arbitrary ACLs for files they do not
> own, essentially granting full access to everything.  The source of
> this problem also caused other misbehavior of ACLs.  This fix resolved
> the issue for 2.6.33, but it was not backported, so 2.6.32 remains
> vulnerable.
> 
> -Dan
> 
> On Thu, Jul 8, 2010 at 11:47 PM, Eugene Teo <eugeneteo@...nel.sg> wrote:
>> Upstream commit 2646a1f6 (2.6.33-rc1) fixed an interesting gfs2 acl issue
>> late last year. Thanks Dan Rosenberg for informing us about this.
>>
>> http://git.kernel.org/linus/2646a1f61a3b5525914757f10fa12b5b94713648
>>
>> I didn't request a CVE name for this but if you need one, ping Steve.
>>
>> Thanks, Eugene
>> --
>> main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }
>>

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