Full Disclosure mailing list archives
Re: Second critical mremap() bug found in all Linux kernels
From: Daniel Lorch <ml-daniel () lorch cc>
Date: Thu, 19 Feb 2004 01:34:18 +0100
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi I checked LKML and Marcelo seems to recommend upgrading to 2.4.25. This is currently not an option for me, as grsecurity-1.9.13- 2.4.24.patch won't properly apply against it. A friend (thanks, Eike Frost) then pointed me to the following URL (bkbits reposi- tory): http://linux.bkbits.net:8080/linux-2.4/diffs/mm/mremap.c@1.8?nav=index.html|ChangeSet@-4d|cset@1.1323 After applying this patch the PoC provided by Christophe Devine reports "kernel my not be vulnerable". This seems to have resolved the issue. Hope this helps others, too. $ uname -a Linux tsunami4 2.4.24-grsec #3 Thu Feb 19 01:00:39 CET 2004 i686 unknown $ ./a.out mmap: Cannot allocate memory created ~65531 VMAs now mremapping 0x3FFE9000 at 0x3FFE5000 kernel may not be vulnerable daniel -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (Darwin) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFANARrS2WJ/hBy2k8RAsDgAKDsgrKBcskZP9aZjsoAj8BmwIgDYACgtBxA xC9pqZXxm585HcC4aO0XEvw= =wKiN -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Second critical mremap() bug found in all Linux kernels Paul Starzetz (Feb 18)
- Re: Second critical mremap() bug found in all Linux kernels Daniel Lorch (Feb 18)
- Re: Second critical mremap() bug found in all Linux kernels Dan Yefimov (Feb 19)
- <Possible follow-ups>
- Re: Second critical mremap() bug found in all Linux kernels Christophe Devine (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Daniel Husand (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Daniel Lorch (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Daniel Husand (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Paul Starzetz (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Christophe Devine (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Gregory A. Gilliss (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels i.t Consulting (Feb 19)
- Re: Re: Second critical mremap() bug found in all Linux kernels Michael Graham (Feb 18)
- Re: Re: Second critical mremap() bug found in all Linux kernels Diego Calleja (Feb 18)
(Thread continues...)