Bug:
There is possible when pam_sm_acct_mgmt() called, password is not
expired, but due to some delay between calls (like network delays for NIS
passwords), expired at the moment of pam_sm_authenticate() check.
It may allow user to enter with expired password under some circumstanes
when he is not allowed to do it.
Fix:
Use traditional Unix check (like found in pre-PAM ftpd.c and login.c) for
password expiration at the last moment, i.e. right after checking that it
is valid.
--- pam_unix.c.bak1 Sun Jan 20 21:42:47 2002
+++ pam_unix.c Sun Jan 20 21:58:45 2002
@@ -152,6 +152,8 @@
retval = strcmp(encrypted, pwd->pw_passwd) == 0 ?
PAM_SUCCESS : PAM_AUTH_ERR;
+ if (pwd->pw_expire && time(NULL) >= pwd->pw_expire)
+ retval = PAM_AUTH_ERR;
}
else {
--
Andrey A. Chernov
http://ache.pp.ru/
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