loose source routing, unreliable results

From: cissper@yahoo.com.au
Date: Tue Mar 02 2004 - 21:50:46 EST


('binary' encoding is not supported, stored as-is) Hi guys

I am lost here! Almost every time when I perform a nessus scan I get this odd vulnerability: loose source routing identified.

I really don’t know how that script works but I have to analyse if this is a false positive or not. When I perform a manual traceroute (UDP) to the destination host, I do not get all gateways listed. It looks similar to that (just as an example):

1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
2 lilacâdmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms
3 lilacâdmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms
4 ccngwânerâcc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms
5 ccnânerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms
6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms
7 * * *
8 * * *


How can the nessus plug-in reporting this vulnerability get through to the destination host with loose source routing when I can get through with ICMP and UDP???

Can anybody explain me how this plug-in works? I just think it doesn’t work properly and always provides a false positive! In addiation, can anyone show how to reproduce what the script does?

Your help is very much appreciated

regards
cissper

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