Red Hat Bugzilla – Bug 55973
cannot su with pam 0.75-16
Last modified: 2013-07-02 18:55:04 EDT
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Description of problem:
Cannot su after updating pam 0.75-14 to pam 0.75-16. Had to reinstall os
and update everything except pam 0.75-14 in order to have access to files
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.update pam 0.75-14 to pam 0.75-16
Actual Results: Lost ability to su
Expected Results: This update is supposed to fix this type of problem with
systems using passwords of 8 or more characters. Instead it produced this
problem on my system.
I did not have a problem as root, only when logged in as user and su to root.
Also same GUI problem as bug 55661 report, but also was unable to have root
privliges to rewrite files after su.
Which authentication systems are configured on this machine? Are you using md5
passwords? Shadow passwords? NIS? Is root's entry in /etc/passwd (or
/etc/shadow, if using shadow) hashed with an md5 crypt (if it is, the second
field will start with "$1$") or with a conventional crypt (if it is, it'll be
exactly 13 characters long, and should contain only characters from the set
I have the same problem, as part of larger authentication problems I encountered
upgrading to pam-0.75-20 (first - 0.75-19 from 7.2 updates)
for user account, plain su does not switch to root ( password is accepted, but
are not granted). su -l root works all right. Bsed on your description, I
MD5 encrypted passwords, no NIS. My password is 9 characters long, mixture of
alphabethical and numerals and '_'.
I use 2.4.16-0.13 kernel and glibc libraries on top of RH7.2 installation.
My large problem is that after I upgraded pam (already with new kernel and
I cannot login through gdm neither to root, nor to user account. My user
8 characters, mixture of lower and upper case alphabethical. Session is getting
and immediately exits. I run gdm with debug unabled - nothing suspicious -
gdm sets cookie to .Xauthority, runs /etc/X11/gdm/Init/Default and session
exits after that (it does not matter what desktop I choose).
It has to do with authentication, since I can run plain startx or xdm all right
- I'm getting
Gnome desktop. However, I'm unable to open any terminals then - any of them
rxvt, xterm) just blink on the screen and disappear. I can however run Netscape
many other applications.
Dowgrading pam back to RH7.2 or RH7.1 version did not help. Neither did
pam_unix to pam_pwdb as was suggested in other bug discussion. Although I may
done all checks consistenly.