Hi,
We're having a bit of a problem here at work and I can't seem to find a
solution.
Problem is:
Whenever a user changes password in our ldap he/she is able to login
with both the old and the new password on some servers, even though
theres is only one user entry in ldap.
It seems PAM or maybe LDAP stores a session with the old authentication
so for a unknown amount of time (at least a week or till server reboot)
the user can login with the old password.
We have a lot of servers and it only seem to be a problem on RedHat
Fedora 4. I can't reproduce the problem on RH Fedora 8.
The RH4 PAM system-auth looks like this:
auth required pam_env.so
auth sufficient pam_unix.so nullok try_first_pass nodelay
auth requisite pam_succeed_if.so uid >= 500 quiet
auth sufficient pam_ldap.so use_first_pass debug
auth required pam_deny.so
account required pam_unix.so broken_shadow
account sufficient pam_localuser.so
account sufficient pam_succeed_if.so uid < 500 quiet
account [default=bad success=ok user_unknown=ignore] pam_ldap.so
account required pam_permit.so
password requisite pam_cracklib.so try_first_pass retry=3
password sufficient pam_unix.so md5 shadow nullok try_first_pass
use_authtok
password sufficient pam_ldap.so use_authtok
password required pam_deny.so
#session optional pam_keyinit.so revoke
session required pam_limits.so
session [success=1 default=ignore] pam_succeed_if.so service in
crond quiet use_uid
session required pam_unix.so
session optional pam_ldap.so
Is there anyone who got any idea on why this is happening? It's quite
the security problem :(
Thanks
--- Frank Nørvig
http://www.noervig.dk
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