On 11/22/22 9:30 AM, Thierry Bordaz wrote:
On 11/22/22 10:28, Julian Kippels wrote:
Hi Thierry,
that's a nasty catch…
On the one hand I think this is a nice feature to improve security,
but on the other hand PBKDF2_SHA256 is the one algorithm that
freeradius cannot cope with.
I suppose there is no way to revert all changed hashes after I set
"nsslapd-enable-upgrade-hash" to "off"? Other than to reinitialize
all affected suffixes from the export of the old servers?
Indeed this is a bad side effect of the default value :(
If you need to urgently fix those new {PBKDF2_SHA256}, then reinit is
the way to go. Else you could change the default password storage to
SSHA and keep nsslapd-enable-upgrade-hash=on. So that it will revert,
on bind, to the SSHA hash.
This reminds me of an enhancement I thought proposed awhile ago, where
the upgrade hash plugin can be configured to use a specific algorithm
(upgrade or downgrade). Might be worth considering it now...
Mark
thierry
Julian
Am 22.11.22 um 09:56 schrieb Thierry Bordaz:
Hi Julian,
This is likely the impact of
https://github.com/389ds/389-ds-base/issues/2480 that was introduced
in 1.4.x.
On 1.4.4 default hash is PBKDF2, this ticket upgrade hash of user
entries during the user bind (enabled with
nsslapd-enable-upgrade-hash).
best regards
thierry
On 11/22/22 09:25, Julian Kippels wrote:
Hi,
We have a radius server that reads the userPassword-attribute from
ldap to authenticate users. There is a strange phenomenon where
sometimes the answer from the ldap-server gives the wrong password
hash algorithm. Our global password policy storage scheme is set to
SSHA. When I perform a ldapsearch as directory manager I see that
the password hash for a given user is
{SSHA}inserthashedpasswordhere. But when I run tcpdump to see what
our radius is being served I see {PBKDF2_SHA256}someotherhash
around 50% of the time. Sometime another request from radius a few
seconds after the first one gives the correct {SSHA} response.
This happened right after we updated from 389ds 1.2.2 to 1.4.4.
I am a bit stumped.
Thanks in advance,
Julian
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