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- Date: Mon, 21 Dec 1998 14:52:29 -0600
- From: Adam Maloney <adam@IEXPOSURE.COM>
- Reply-To: Bugtraq List <BUGTRAQ@netspace.org>
- To: BUGTRAQ@netspace.org
- Subject: Re: [In]security in USR TotalSwitch
-
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-
- Normally I would've bought a Cisco switch, or a different 3com switch, but
- these guys were so cheap, i couldn't resist.
-
- I recently upgraded to the newest version of the firmware, and the
- vulnerability still exists.
-
- The version I'm using is 2.2 released on 10/30/97 There is no mention of
- any newer version in their totalsupport download area.
-
- Where did you see the patch? I can't find any mention of it.
-
- Thanks,
- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
- Adam Maloney
- Systems Administrator
- Internet Exposure
- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
- -----Original Message-----
- >From: Lou Anschuetz <lou@ZAPHOD.ECE.CMU.EDU>
- To: BUGTRAQ@netspace.org <BUGTRAQ@netspace.org>
- Date: Monday, December 21, 1998 2:35 PM
- Subject: Re: [In]security in USR TotalSwitch
-
-
- >> I searched the archives, with no luck finding anything about this.
- >>
- >> Recently a bunch of USR TotalSwitch (chassis which takes 5 cards, 10 /
- 100 /
- >> fddi / whatever, and a network management card) units went up for
- auction,
- >> and I know a lot of people purchased them, hence my concern.
- >>
- >> The switch is managable via snmp, telnet or a console port. Using the
- >> management features, you can disable / enable certain ports, configure IP
- >> routes and such. The management software allows you to set a password to
- >> access the switch (either by telnet or the console).
- >>
- >> Of course, there is a back-door so techs could reset or debug the unit if
- >> they didn't have the password. Unfortunately, this backdoor is not
- limited
- >> to the console port like it should be. It is possible to telnet to the
- >> switch, enter a "secret code" (which is readily available, for everyone's
- >> sake I won't give it out here) and do a memory dump to see the plaintext
- >> password.
- >>
- >> Solution: 3COM - limit this functionality to the console port ONLY.
- >> End-user - add an access list to filter telnet to your switch's IP
- address
- >> from outside your network.
- >>
- >> P.S. If anyone knows where to get the 100btx cards for this thing, please
- >> e-mail me!
- >>
- >> Reguards,
- >>
- >3COM did put out a patch for this, though it was rather quietly -
- >it also effects all CoreBuilder switches. Fortunately, I only buy
- >un-managed 3COM stuff. Everything that is a switch (or above) is
- >Cisco.
- >
- >--
- >-
- >Lou Anschuetz, lou@ece.cmu.edu
- >Network Manager, ECE, Carnegie Mellon University
-
-