full-disclosure - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up

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Date: Mon, 23 Jan 2012 04:55:11 +0100
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: noloader@...il.com
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Linux Local Root -- CVE-2012-0056 -- Detailed
	Write-up

Never seen checksec. Cool.

As it turns out, Fedora seems to do a good job at compiling (all? not
sure) their suid executables with -pie.

On Mon, Jan 23, 2012 at 04:53, Jeffrey Walton <noloader@...il.com> wrote:
> Good point about [lack of] compiler and linker hardening on the `su`
> binary (and probably many others). Perhaps distributions should run
> Checksec (http://www.trapkit.de/tools/checksec.html) on their
> binaries.
>
> On Sun, Jan 22, 2012 at 6:25 PM, Jason A. Donenfeld <Jason@...c4.com> wrote:
>> Server presently DoS'd, or dreamhost is tweaking again.
>>
>> Cache link:
>>
>> http://webcache.googleusercontent.com/search?hl=en&safe=off&biw=1009&bih=687&sclient=psy-ab&q=cache%3Ahttp%3A%2F%2Fblog.zx2c4.com%2F749&pbx=1&oq=cache%3Ahttp%3A%2F%2Fblog.zx2c4.com%2F749&aq=f&aqi=g4&aql=&gs_sm=e&gs_upl=1077l2167l0l2282l7l4l0l0l0l0l148l403l2.2l4l0
>>
>> On Sun, Jan 22, 2012 at 19:19, Jason A. Donenfeld <Jason@...c4.com> wrote:
>>>
>>> Hey Everyone,
>>>
>>> I did a detailed write-up on exploiting CVE-2012-0056 that some of
>>> y'all might appreciate. Pretty fun bug to play with -- dup2ing all
>>> over the place for the prize of getting to write arbitrary process
>>> memory into su :-).
>>>
>>> The write up is available on my blog here: http://blog.zx2c4.com/749 . Enjoy.
>>>
>>> Jason

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