[cisco-voip] CUCM and Auto Fill Credentials

[Lelio Fulgenzi]

Thank you very much for bring this to the group’s attention. And for providing some great troubleshooting steps to see whether we might be affected. Thanks to others for providing other information as well.


On the one hand, I see it being a browser issue – autocompleting when it shouldn’t (although you’re asked at least once, are you not?) and ignoring the autocomplete=false…. But…

Should Cisco really be storing passwords in clear text anywhere?




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Lelio Fulgenzi, B.A. | Senior Analyst
Computing and Communications Services | University of Guelph
Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1
519-824-4120 Ext. 56354 | lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>

www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs> | @UofGCCS on Instagram, Twitter and Facebook

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From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Anthony Holloway
Sent: Wednesday, March 14, 2018 9:50 PM
To: Cisco VoIP Group <cisco-voip at puck.nether.net>
Subject: [cisco-voip] CUCM and Auto Fill Credentials

I'm working on something, and was wondering if you could check something for me, so I can better understand why and how often this is happening.

So, I was looking at phone config file today, and I noticed the ccmadmin username and password was in the XML, and in plain text nonetheless.

I found out that the browser, when told to remember your credentials, will treat the SSH username/password fields as login fields whenever you modify a phone, and you might be unknowingly save your credentials for clear text view by unauthenticated users.

Is anyone already aware of this?

You could you run the following command on your clusters:

run sql select name, sshuserid from device where sshuserid is not null and sshuserid <> ""

Then in the output, if there are any hits, look at the config XML file for the phone and see if the passwords are there.

E.g.,

output might be:

SEP6899CD84B710 aholloway

So then you would navigate your browser to:

http://<tftpserver>:6970/SEP6899CD84B710.cnf.xml<http://%3ctftpserver%3e:6970/SEP6899CD84B710.cnf.xml>

You then might have to view the HTML source of the page, because the browser might mess up the output.

You're then looking for the following two fields, your results will vary:

<sshUserId>aholloway</sshUserId>
<sshPassword>MyP at ssw0rd</sshPassword>

Then, since we now know it's happening, get list of how many different usernames you have with this command:

run sql select distinct sshuserid from device where sshuserid is not null and sshuserid <> "" order by sshuserid

This could also be happening with Energy Wise settings, albeit not on the same web pages.

I'm curious about two things:

1) Is it even happening outside of my limited testing scenarios?
2) How many different usernames and passwords were there?

If the answers are yes, and 1 or more, then this is an issue Cisco should address.

The reason it's happening is because the way in which browsers identify login forms, is different from the way in which web developers understand it to work.  Cisco uses the element attribute on these fields "autocomplete = false" and unfortunately, most browser ignore that directive.

I have noticed that this does not happen, if you have more than 1 saved password for the same site, rather it will only happen if you use the same login for the entire site.  Our highest chance of seeing this happen are for operations teams where they login with their own accounts, and do not use DRS or OS Admin.
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