[Samba] Retrieve winbind machine password
Kees van Vloten
keesvanvloten at gmail.com
Mon Oct 23 09:06:19 UTC 2023
Op 23-10-2023 om 10:58 schreef Pavel Filipenský:
> On 10/22/23 13:36, Kees van Vloten via samba wrote:
>> Op 22-10-2023 om 03:43 schreef Andrew Bartlett:
>>> On Sat, 2023-10-21 at 11:41 +0200, Kees van Vloten via samba wrote:
>>>> Hi Team,
>>>> I am currently looking into enterprise wifi with the machine
>>>> account. I
>>>> did find some clues on the internet but the peice that is missing
>>>> is the
>>>> password of the machine account.
>>>> Is it possible foor user root to extract that password in clear text
>>>> from the secrets database where winbind has stored it?
>>>> /var/lig/samba/private/secrets.tdb seems to contain the info and
>>>> tdbdump can output it, but some more decoding is needed before it
>>>> can be
>>>> used in the NetworkManager configuration. What are the commands to get
>>>> that done?
>>> People used to do this with tools that read that DB, which is of course
>>> possible, but we have this script:
>>> Note that the password is very random these days.
>>> But please do be aware that MSCHAPv2 is still NTLMv1 under the hood.
>>> Better than plaintext if you have the certificate checking done
>>> properly, but if you can do real certificates, do that!
>> Thanks Andrew,
>> I run my own CA and verify all certificates, that part is taken care
>> of :-)
>> This link to MIT's Eduroam knowledgebase confirms your statement:
>> One more question: Would it be possible to trigger a script when
>> winbind changes the machine password?
> Hi Kees,
> I am working on a related topic - keytab update when machine account
> password is changed:
> I will try to add a 'script triggering' once the keytab update is done.
Thanks Pavel, that would make it a lot easier!
It looks like the MR has been open for a really long time. Do you expect
to finish and get it merged any time soon?
>> That would help to update the wifi configuration on password change
>> and prevents lockout on the AD-side to to wrong password.
>> - Kees.
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