CentOS - Nov 2006 - "undefined symbol: _pam_make_env"

Hello,

A while ago I downloaded and compiled PAM 0.99.x and installed it over 
the default CentOS PAM installation. Of course, this premature decision 
led to root and FTP access being fully locked down and inaccessible.

When I  `su -`, it prints "su: incorrect password" before it gives me 
the chance to type a password. When I `sudo su -`, it prints "sudo: 
pam_authenticate: Module is unknown". The most elaborate error from 
that point on is in /var/log/secure, which prints the following when I 
supply valid FTP log in credentials:

Nov 24 19:57:07 ded sudo: PAM unable to 
dlopen(/lib/security/pam_stack.so)
Nov 24 19:57:07 ded sudo: PAM [error: /lib/security/pam_stack.so: 
undefined symbol: _pam_make_env]
Nov 24 19:57:07 ded sudo: PAM adding faulty module: 
/lib/security/pam_stack.so

  I've tried reinstalling PAM via yum, it's dependencies, and it's 
furthest dependencies with no apparent success. Does anyone know how 
this can be fixed without formatting the entire system?

Thanks,
--ness

????????????, ness.

?? ?????? 25 ?????? 2006 ?., 5:08:36:
> A while ago I downloaded and compiled PAM 0.99.x and installed it over
> the default CentOS PAM installation. Of course, this premature decision
> led to root and FTP access being fully locked down and inaccessible.
You're a bit risky, I wouldn't do than If I'd be on your place.
> Nov 24 19:57:07 ded sudo: PAM unable to
> dlopen(/lib/security/pam_stack.so)
> Nov 24 19:57:07 ded sudo: PAM [error: /lib/security/pam_stack.so: 
> undefined symbol: _pam_make_env]
> Nov 24 19:57:07 ded sudo: PAM adding faulty module:
> /lib/security/pam_stack.so
It's obvious that you've got your PAM .so libs replaced with the ones
from PAM 0.99.x.
>   I've tried reinstalling PAM via yum, it's dependencies, and
it's
> furthest dependencies with no apparent success. Does anyone know how 
> this can be fixed without formatting the entire system?
Download and somehow place somewhere in the filesystem of broken
server following files from CentOS 4.4 distro:
pam-0.77-66.14.i386.rpm
util-linux-2.12a-16.EL4.16.i386.rpm

Reboot your system, provide your kernel with
init=/bin/bash
commandline.

Boot into, use
# /bin/rpm -Uvh --nodeps --replacefiles --replacepkgs --oldpackage
pam-0.77-66.14.i386.rpm util-linux-2.12a-16.EL4.16.i386.rpm

Check the contents of /etc/pam.d, reboot.

If you're lucky enough you'll get a working system again.

-- 
? ?????????,
 Alexey                          mailto:aloukianov at lavtech.ru