By providing the 4tuple ip/port dst/src it makes guessing easier. As for production vs non-production I suspect we have a mix I did not even begin to audit them. I few spot checks is all I had time for. I would welcome any assistence in auditing vulnerable looking glass/route servers and would personally urge any LG/RS owners that were too verbose to lock them down a little. Something I wasn't looking for but found was a full open connect proxy. With that you can connect to any ip on any port nice way to scan someelses network and hide your source. I also found a few that allowed show flash:. Personally the exact image we run on a router isn't something I would want to publish:-) Will locking down looking glass/route servers stop the tcp vulnerablity? NO. Does providing information assist in trouble shooting a bgp issue? NO. I tend to error on the side of caution. Donald.Smith@qwest.com GCIA http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xAF00EDCC I reserve the right to be wrong and exercise as required. -----Original Message----- From: Lane Patterson [mailto:lpatterson@equinix.com] Sent: Wednesday, April 21, 2004 5:22 PM To: Smith, Donald; nanog@merit.edu Subject: RE: tcp bgp vulnerability looking glass and route server issues. Sensitivity: Private While I agree that publicly open route-views routers should not allow display of "sho ip bgp nei" information, this is only giving away 4-tuple info regarding non-production BGP sessions, right? So folks could potentially flap the route-views sessions, but this will not affect any production routing in the data path. If any folks are allowing "sho ip bgp nei" via looking glass interface to a production router, then yes, that is a problem. I haven't seen any.

-----Original Message----- From: Smith, Donald [mailto:Donald.Smith@qwest.com] Sent: Tuesday, April 20, 2004 1:38 PM To: nanog@merit.edu Subject: tcp bgp vulnerability looking glass and route server issues. Sensitivity: Private

John Fraizer author of MRLG one of the looking glass implementations has updated his code to fix a flaw that provided too much information.

MRLG-4.3.0 is available at: Available here: ftp://ftp.enterzone.net/looking-glass/CURRENT/

Some route servers also provide too much info. This audit was performed yesterday so if you have already fixed this issue please ignore:-) Part of this issue is the fact that some router servers provide too much information. Without knowing the source/destination ports and IP's this is still a difficult vulnerability to exploit.

From this URL I did a quick audit. http://www.traceroute.org/#Route%20Servers I did NOT look at the looking glass URLs just the route servers.

This is the list of open route servers I did a quick audit on. No connection means I was unable to connect to it. Not misconfigured meant sho ip bgp nei did NOT work. Sho ip bgp nei gives full ports/ips

means what you think it means. You have may want to see if any of them

are yours of if you peer / are the upstream for any of them.

"Route Servers"

"telnet://ner-routes.bbnplanet.net" BBN Planet NER route monitor No connection

"telnet://route-server.belwue.de" BelWue (AS553) Sho ip bgp nei gives full ports/ips.

"telnet://route-views.on.bb.telus.com">Telus - East Coast (AS852) Sho ip bgp nei gives full ports/ips.

telnet://route-views.ab.bb.telus.com" Telus - West Coast (AS852) Sho ip bgp nei gives full ports/ips.

"telnet://route-server.cerf.net">CerfNet Route Server (AS1838)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.ip.tiscali.net">Tiscali (AS3257)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.gblx.net">Global Crossing (AS3549)</A></LI> Not

misconfigured:-)

"telnet://route-server.savvis.net/">SAVVIS Communications (AS3561)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://public-route-server.is.co.za" TARGET=NEW>Internet Solutions (AS3741)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server-ap.exodus.net">Exodus Communications Asia (AS4197)</A></LI> No connection

"telnet://route-server.as5388.net">Planet Online (AS5388)</A></LI> Sho

ip bgp nei gives full ports/ips.

"telnet://route-server.opentransit.net">Opentransit (AS5511)</A></LI> Not misconfigured:-)

"telnet://tpr-route-server.saix.net">South African Internet eXchange SAIX (AS5713)</A></LI> Not misconfigure:-)

"telnet://route-server.gt.ca">GT Group Telecom (AS6539)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.as6667.net">EUNet Finland (AS6667)</A></LI> Sho

ip bgp nei gives full ports/ips.

"telnet://route-server.he.net">Hurricane Electric (AS6939)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.ip.att.net">AT&T (AS7018)</A></LI> No connection

"telnet://route-views.optus.net.au">Optus Route Server Australia (AS7474)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.wcg.net">Wiltel (AS7911)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.colt.net">Colt Internet (AS8220)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server-eu.exodus.net">Exodus Communications Europe (AS8709)</A></LI> No connection

"telnet://route-views.bmcag.net">Broadnet mediascape communications AG (AS9132)</A></LI> Not misconfigured:-)

"telnet://route-server-au.exodus.net">Exodus Communications Australia (AS9328)</A></LI> No connection

"telnet://route-server.manilaix.net.ph">Manila Internet Exchange, Philippines (AS9670)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.east.attcanada.com">ATT Canada - East (AS15290)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.west.attcanada.com">ATT Canada - West (AS15290)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.ip.ndsoftware.net">NDSoftware (AS25358)</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://route-server.loudpacket.net">Loud Packet (AS27276)</A></LI> No connection.

"telnet://route-server.as28747.net/">RealROOT (AS28747)</A></LI> No connection

"telnet://route-views.oregon-ix.net">Oregon-ix.net Route Server</A></LI> Sho ip bgp nei appears it WOULD provide full ports/ips if they had any? The command executed but came back empty!!?? This one can be used as a proxy bounce (connect ip port) too:-(

"telnet://route-server.utah.rep.net">Utah Regional Exchange Point Route Server</A></LI> Sho ip bgp nei gives full ports/ips.

"telnet://www.netlantis.org">The NetLantis Project Route Server</A></LI> Not misconfigured.

http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xAF00EDCC pgpFingerPrint:9CE4 227B B9B3 601F B500 D076 43F1 0767 AF00 EDCC Increased trust is received by not violating the trust you have received.