[cisco-voip] CUCM and Auto Fill Credentials

[Anthony Holloway]

In the article I shared, it covers this exact scenario:

"If an author would like to prevent the autofilling of password fields in
user management pages where a user can specify a new password for someone
other than themself, autocomplete="new-password" should be specified,
though support for this has not been implemented in all browsers yet."

Source:
https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion#The_autocomplete_attribute_and_login_fields

Until all browsers support it, perhaps making it a pop up window to
configure, like how IP Phone service subscriptions and speed dials are,
this way you know that filling in these fields is intentional.  The real
trouble with how it works now is, the secure shell area is far below the
view port, and you have no idea it's even happening.  So, if you simply
open a phone page, change the CSS, click save; you think you made 1 change,
when in fact you made 3: CSS, secure shell username, and secure shell
password.

Cisco could also put the number of fields updated on the top of the page in
the Status area.  E.g., 3 Changes saved successfully.

On Mon, Mar 19, 2018 at 11:07 AM Ryan Ratliff (rratliff) <rratliff at cisco.com>
wrote:

> The challenge here is that you want the “type” of the input to be set to
> password for these fields so the browser will replace the contents with
> *****.
>
> What would you rename in this case?  Is it the label for the input, the id
> of the input itself? For the login and ssh password fields the ids don’t
> match and neither do the label fields (login page doesn’t have a label at
> all).
>
> With respect to the service profile this is also resolved in 12.0 where
> username and password are no longer in the service profile.
>
> I brought this issue up with PSIRT today and the general consensus is that
> we are trying to do the right thing by specifying autocomplete=off on these
> fields. The fact that the browser ignores this for password input fields is
> a problem, but we need more inputs from the DEs on how or if we can prevent
> this. We are going to look into back-porting the fix from 12.0 into older
> releases.
>
> -Ryan
>
> On Mar 16, 2018, at 2:10 PM, Anthony Holloway <
> avholloway+cisco-voip at gmail.com> wrote:
>
> "...I think they need to rename some of these fields so that password
> autofill doesn't happen."
>
> Exactly!  If you're going to build a web app, you have to understand how
> the browser works.  Granted, the browser should be a little more
> intelligent about what it thinks is a login form, but the web developers
> should know how that process works, and how to avoid having the browser
> mistake their fields for login forms.
>
> On Fri, Mar 16, 2018 at 11:32 AM Brian Meade <bmeade90 at vt.edu> wrote:
>
>> This is also a problem on the Service Profile page filling in LDAP
>> Username/Password.  I see so many customers with their admin accounts
>> filled in here from autofill on their browsers.  These are sent clear-text
>> to Jabber clients.
>>
>> I think I talked to some Cisco folks on this and it didn't get anywhere
>> since it was more a browser issue.  I think they need to rename some of
>> these fields so that password autofill doesn't happen.
>>
>> On Wed, Mar 14, 2018 at 9:49 PM, Anthony Holloway <
>> avholloway+cisco-voip at gmail.com> wrote:
>>
>>> 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*
>>>
>>> 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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>>>
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>
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