Yes, definitely. I use the grsecurity patch on all the systems I build personally, as well as the company I work for--which involves hundreds of shared and dedicated server clients. I highly recommend it as a default patch to work with. -- Regards, Tim Greer chatmasterat_private Server administration, security, programming, consulting. ----- Original Message ----- From: "Andrew Ruef" <jabberwockyat_private> To: <incidentsat_private> Sent: Thursday, June 19, 2003 8:34 PM Subject: RE: chkrootkit and LKM? Actually the best way to do that is to turn off module support within the kernel and then use some device (the grsecurity kernel patches and the StJude LKM both have these) to close down things like access to /dev/kmem, /dev/ports, privileged I/O, so on. This closes down other avenues for code to be loaded into the kernel. A. Ruef -----Original Message----- From: Tim Greer [mailto:chatmasterat_private] Sent: Wednesday, June 18, 2003 12:22 PM To: Rob Shein; 'Janus N. Tøndering'; incidentsat_private Subject: Re: chkrootkit and LKM? > ----- Original Message ----- > From: "Rob Shein" <shotenat_private> > To: "'Tim Greer'" <chatmasterat_private>; "'Janus N. Tøndering'" <janusat_private>; <incidentsat_private> > Sent: Wednesday, June 18, 2003 12:47 AM > Subject: RE: chkrootkit and LKM? > > This won't help if it's an LKM...LKM stands for "Linux Kernel Module," For some reason, I just saw 'chrootroot' and not LKM; hence my response. Anyway, I always recommend people not compile in loadable module support if they want a more secure kernel and to avoid this type of problem in the future. -- Regards, Tim Greer chatmasterat_private Server administration, security, programming, consulting. ------------------------------------------------------------------------ ---- Attend the Black Hat Briefings & Training, July 28 - 31 in Las Vegas, the world's premier technical IT security event! 10 tracks, 15 training sessions, 1,800 delegates from 30 nations including all of the top experts, from CSO's to "underground" security specialists. See for yourself what the buzz is about! Early-bird registration ends July 3. This event will sell out. www.blackhat.com ------------------------------------------------------------------------ ---- ---------------------------------------------------------------------------- Attend the Black Hat Briefings & Training, July 28 - 31 in Las Vegas, the world's premier technical IT security event! 10 tracks, 15 training sessions, 1,800 delegates from 30 nations including all of the top experts, from CSO's to "underground" security specialists. See for yourself what the buzz is about! Early-bird registration ends July 3. This event will sell out. www.blackhat.com ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- Attend the Black Hat Briefings & Training, July 28 - 31 in Las Vegas, the world's premier technical IT security event! 10 tracks, 15 training sessions, 1,800 delegates from 30 nations including all of the top experts, from CSO's to "underground" security specialists. See for yourself what the buzz is about! Early-bird registration ends July 3. This event will sell out. www.blackhat.com ----------------------------------------------------------------------------
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