Problem with pam_chauthtok

Robert Currey — Wed, 21 Mar 2007 14:25:29 GMT

One of our customers is using pam_ldap (hp11i non-trusted) and has some password policies in effect.

we called
int result = pam_acct_mgmt(m_pam_h, PAM_DISALLOW_NULL_AUTHTOK);
and got the PAM_NEW_AUTHTOK_REQD

We then call pam_chauthtok(m_pam_h, PAM_CHANGE_EXPIRED_AUTHTOK);

and our log then gathers the following ...
(master) [21 Mar 18:32:18]: leader[7]: pam-login:PamConversationHandler num_msg=1
(master) [21 Mar 18:32:18]: leader[7]: pam-login:PamConversationHandler msg[0]: Old password: (prompt w/o echo)
(master) [21 Mar 18:32:23]: leader[7]: pam-login:PamConversationHandler response=install10
(master) [21 Mar 18:32:23]: leader[7]: pam-login:PamConversationHandler num_msg=1
(master) [21 Mar 18:32:23]: leader[7]: pam-login:PamConversationHandler msg[0]: New password: (prompt w/o echo)
(master) [21 Mar 18:32:24]: leader[7]: pam-login:PamConversationHandler response=aa
(master) [21 Mar 18:32:24]: leader[7]: pam-login:PamConversationHandler num_msg=1
(master) [21 Mar 18:32:24]: leader[7]: pam-login:PamConversationHandler msg[0]: Re-enter new password: (prompt w/o echo)
(master) [21 Mar 18:32:26]: leader[7]: pam-login:PamConversationHandler response=aa
(master) [21 Mar 18:32:26]: leader[7]: pam-login:PamConversationHandler num_msg=1
(master) [21 Mar 18:32:26]: leader[7]: pam-login:PamConversationHandler msg[0]: Failed password policy checking
(master) [21 Mar 18:32:26]: leader[6]: pam-login: pam_chauthtok returned 0

So ... the pam module sent the "Failed password policy checking" string for us to display, but then pam_chauthtok return PAM_SUCCESS (so as far as the caller of the API is concerned the AUTHTOK was successfully changed and updated).

Seems pretty clear to me that pam_chauthtok() is returning an invalid result (probably as a result of a module having a pam_sm_chauthtok bug()?)

I'll try to gather some additional info if needed:
which pam_ldap package version
which LDAP backend
how the password policies are specified
etc

Let me know what other info I can gather if needed.

Thanks

Rob

Re: Problem with pam_chauthtok

Robert Currey — Wed, 21 Mar 2007 14:30:33 GMT

BTW,

I did find
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1078256

which seems to be a similar type of report ...

Rob

topic Re: Problem with pam_chauthtok in Operating System - HP-UX

Problem with pam_chauthtok

Re: Problem with pam_chauthtok