I wasn't able to make it work either, getting exactly the same output (without GCC's warnings). I'm on a Debian 2.6.11-7 kernel. I just tested but really didn't even look what it failed, not even gdb'ed the core. If someone notices what's wrong on the POC please, let me know. Thanks, Pablo Fernandez
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- To: bugtraq@xxxxxxxxxxxxxxxxx
- Subject: Re: Linux kernel ELF core dump privilege elevation
- From: Bruno Lustosa <bruno.lists@xxxxxxxxx>
- Date: Wed, 11 May 2005 16:34:58 -0300
- Delivery-date: Wed, 11 May 2005 19:24:47 -0400
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- Reply-to: Bruno Lustosa <bruno.lists@xxxxxxxxx>
On 5/11/05, Paul Starzetz <ihaquer@xxxxxxx> wrote: > since it became clear from the discussion in January about the uselib() > vulnerability, that the Linux community prefers full, non-embargoed > disclosure of kernel bugs, I release full details right now. However to > follows at least some of the responsable disclosure rules, no exploit code will be > released. Instead, only a proof-of-concept code is released to demonstrate > the vulnerability. Paul, I was unable to make it work on my amd64. Running Gentoo on kernel 2.6.11. This was the output: [+] Compiling...elfcd1.c: In function `main': elfcd1.c:48: warning: implicit declaration of function `strlen' elfcd1.c:54: warning: implicit declaration of function `memset' elfcd1.c:60: warning: implicit declaration of function `strcmp' /usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/../../../../x86_64-pc-linux-gnu/bin/ld: warning: i386:x86-64 architecture of input file `/tmp/ccSCdKeo.o' is incompatible with i386 output [+] ./elfcd1 argv_start=0x7ffffffff451 argv_end=0x7ffffffff459 ESP: 0xfffff0e0 [+] phase 1 [+] AAAA argv_start=0x7fffffff6fea argv_end=0x7fffffff6fee ESP: 0xffff6de0 [+] phase 2, <RET> to crash Segmentation fault (core dumped) -- Bruno Lustosa, aka Lofofora | Email: bruno@xxxxxxxxxxx Network Administrator/Web Programmer | ICQ: 1406477 Rio de Janeiro - Brazil |
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