Date: Fri, 31 May 2002 12:34:49 -0400
 From: Dug Song 
 To: bugtraq@securityfocus.com
 Cc: dsniff@monkey.org
 Subject: Re: Trojan/backdoor in fragroute 1.2 source distribution
 
 On Fri, May 31, 2002 at 09:55:21AM +0200, Anders Nordby wrote:
 
 
 > Although downloading it now seems safe, I think folks should know
 > this.  The changes done were similar to what happened to irssi, but
 > with a different IP.
 
 
 monkey.org was compromised on May 14th, via an epic4-pre2.511
 client-side hole which produced a shell to one of the local admin's
 accounts. this was later used to reattach to one of his screen
 sessions, which apparently had a root window open (su very bad!).
 
 the dsniff-2.3, fragroute-1.2, and fragrouter-1.6 tarballs were all
 modified at 3 AM on May 17th to include the same configure backdoor as
 described in the irssi advisory. no other public web content was
 modified, and the system was restored a week later, from scratch.
 the correct checksums are:
 
 MD5 (dsniff-2.3.tar.gz) = 183e336a45e38013f3af840bddec44b4
 MD5 (fragroute-1.2.tar.gz) = 7e4de763fae35a50e871bdcd1ac8e23a
 MD5 (fragrouter-1.6.tar.gz) = 73fdc73f8da0b41b995420ded00533cc
 
 of the 1951 hosts that successfully downloaded one of the backdoored
 tarballs, 992 of them were Windows machines and 193 were automated
 ports downloads for the *BSD dsniff or fragrouter ports, leaving 746
 Linux (and a few Solaris and MacOS) hosts potentially vulnerable, and
 20 FreeBSD and OpenBSD hosts.
 
 we have since migrated our system to OpenBSD-current, importing Niels
 Provos' excellent systrace subsystem:
 
 	http://www.citi.umich.edu/u/provos/systrace
 
 which allows us to run all user sessions under a restricted syscall
 policy (e.g. so an IRC client cannot exec(), open() anything outside
 ~/.irc, etc.), similar in spirit to Goldberg and Wagner's Janus
 sandbox, or Cowen's SubDomain.
 
 in the future, our software distributions may carry embedded
 signatures via gzsig:
 
 	http://www.monkey.org/~dugsong/gzsig-0.1.tar.gz
 
 but for the time being, please be careful what you download, and
 carefully audit or sandbox any third-party scripts or software you
 run...
 
 -d.
 
 ---
 http://www.monkey.org/~dugsong/