Full Disclosure mailing list archives

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

From: "Jason A. Donenfeld" <Jason () zx2c4 com>
Date: Mon, 23 Jan 2012 04:55:11 +0100

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 () gmail 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 () zx2c4 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 () zx2c4 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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Current thread:

Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up, (continued)
- - - Message not available
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up sd (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 23)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up sd (Jan 23)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 23)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 23)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up sd (Jan 24)
    - Message not available
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 24)
  - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jeffrey Walton (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jeffrey Walton (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 23)
  - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jeffrey Walton (Jan 25)
  - Message not available
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 22)
    - Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up halfdog (Jan 23)
- Re: Linux Local Root -- CVE-2012-0056 -- Detailed Write-up Jason A. Donenfeld (Jan 23)