Full Disclosure mailing list archives
Re: Linux kernel IGMP vulnerabilities
From: "Timothy Hall" <admin () TELE2WIN NET>
Date: Wed, 15 Dec 2004 16:02:10 -0500
Greetings Paul and Stephen and List... Paul thanks for clearing that up. SuSE 9.0 Pro (at least the way two boxes I take care of are set up) have /proc/net/igmp /proc/net/mcfilter but 'mcfilter' is empty. No local users other than myself... At least that I can tell... :) TîMöTH¥ Hª££
Paul Starzetz <ihaquer () isec pl> 12/15/04 07:34AM >>>
On Tue, 14 Dec 2004, stephen joseph butler wrote:
/proc/net/igmp /proc/net/mcfilter if both exist and are non-empty you are vulnerable!Just to be clear: if "mcfilter" is empty, then you aren't
vulnerable?
I have both files, and "igmp" contains data, but "mcfilter" is
empty. You are not vulnerable to the remote attack described under (3), however your kernel may be still buggy. Note that you need a running process that has manipulated its multicast socket filters. If your kernel is buggy and you have local users such an application can always appear, at a time you don't expect it. -- Paul Starzetz iSEC Security Research http://isec.pl/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Linux kernel IGMP vulnerabilities Paul Starzetz (Dec 15)
- Re: Linux kernel IGMP vulnerabilities Pekka Savola (Dec 15)
- Re: Linux kernel IGMP vulnerabilities stephen joseph butler (Dec 16)
- Re: Linux kernel IGMP vulnerabilities Paul Starzetz (Dec 22)
- <Possible follow-ups>
- Re: Linux kernel IGMP vulnerabilities Timothy Hall (Dec 17)