Full Disclosure mailing list archives
Re: Re: Linux kernel do_mremap() proof-of-concept exploit code
From: Pierre BETOUIN <info16 () ifrance com>
Date: Tue, 06 Jan 2004 23:57:05 +0100
That's true. The piece of vulnerable code is here : #ifdef CONFIG_GRKERNSEC_PAX_SEGMEXEC if (current->flags & PF_PAX_SEGMEXEC) { if (new_len > SEGMEXEC_TASK_SIZE || new_addr > SEGMEXEC_TASK_SIZE-new_len) goto out; } else #endif The PoC can be easily adapted. Pierre Le mar 06/01/2004 à 21:34, backblue a écrit :
On Tue, 6 Jan 2004 11:47:26 -0700 "Epic" <epic () hack3r com> wrote:I too tested it on my 2.4.23 kernel with grsec, and nothing. ----- Original Message ----- From: "Daniel Husand" <io () naiv us> To: <full-disclosure () lists netsys com> Sent: Tuesday, January 06, 2004 10:54 AM Subject: [Full-disclosure] Re: Linux kernel do_mremap() proof-of-concept exploit code-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Christophe Devine wrote: | The following program can be used to test if a x86 Linux system | is vulnerable to the do_mremap() exploit; use at your own risk. | | $ cat mremap_poc.c | This didnt do anything on my 2.4.23-grsec kernel. - -- Daniel -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQE/+vZz1PIgHh6MkiIRAiqNAKCiuyxtA9rgaAS+eT3o9ATvLE7EuQCeJAZP Xf8JIDehgtGba4b1Eb2Qv0w= =xyYM -----END PGP SIGNATURE-----
-- Pierre BETOUIN http://securitech.homeunix.org http://www.challenge-securitech.com GnuPG key : E7AD 29A1 7345 5BA0 9469 DE62 2CD5 9242 94D9 CB23 lynx -dump securitech.homeunix.org/pbetouin.asc | gpg --import
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Current thread:
- Linux kernel do_mremap() proof-of-concept exploit code Christophe Devine (Jan 05)
- Re: Linux kernel do_mremap() proof-of-concept exploit code Daniel Husand (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code Epic (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code backblue (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code Pierre BETOUIN (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code Epic (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code Daniel B (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code Luke Norman (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code José María Mateos (Jan 06)
- Re: Linux kernel do_mremap() proof-of-concept exploit code Daniel Husand (Jan 06)
- Re: Re: Linux kernel do_mremap() proof-of-concept exploit code KF (Jan 06)
- <Possible follow-ups>
- Re: Linux kernel do_mremap() proof-of-concept exploit code over_g (Jan 06)
- Re: Linux kernel do_mremap() proof-of-concept exploit code Alex (Jan 06)
- RE: Linux kernel do_mremap() proof-of-concept exploit code Bryce Porter (Jan 07)