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Top Forums UNIX for Advanced & Expert Users SOCKS proxy & PAM configuration exposure Post 302986804 by rbatte1 on Wednesday 30th of November 2016 09:19:00 AM
Old 11-30-2016
The content of /etc/pam.d/system-auth is below:-
Code:
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth        required      pam_env.so
auth        sufficient    pam_unix.so nullok try_first_pass
auth        requisite     pam_succeed_if.so uid >= 500 quiet
auth        sufficient    pam_winbind.so try_first_pass
auth        required      pam_deny.so

account     required      pam_unix.so broken_shadow
account     required      pam_access.so
account     sufficient    pam_localuser.so
account     sufficient    pam_succeed_if.so uid < 500 quiet
account     [default=bad success=ok user_unknown=ignore] pam_winbind.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_winbind.so use_authtok
password    required      pam_deny.so

session     required      pam_mkhomedir.so skel=/etc/skel/ umask=0022
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


Have we done something really bad? Well, I suppose it's bad enough to allow anyone with a valid account Smilie

I know it's designed to be flexible and allow applications to abstract the authentication/authorisation etc. , but it is very confusing!

Apologies,
Robin
 

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PAM_DENY(8)							 Linux-PAM Manual						       PAM_DENY(8)

NAME
pam_deny - The locking-out PAM module SYNOPSIS
pam_deny.so DESCRIPTION
This module can be used to deny access. It always indicates a failure to the application through the PAM framework. It might be suitable for using for default (the OTHER) entries. OPTIONS
This module does not recognise any options. MODULE TYPES PROVIDED
All module types (account, auth, password and session) are provided. RETURN VALUES
PAM_AUTH_ERR This is returned by the account and auth services. PAM_CRED_ERR This is returned by the setcred function. PAM_AUTHTOK_ERR This is returned by the password service. PAM_SESSION_ERR This is returned by the session service. EXAMPLES
#%PAM-1.0 # # If we don't have config entries for a service, the # OTHER entries are used. To be secure, warn and deny # access to everything. other auth required pam_warn.so other auth required pam_deny.so other account required pam_warn.so other account required pam_deny.so other password required pam_warn.so other password required pam_deny.so other session required pam_warn.so other session required pam_deny.so SEE ALSO
pam.conf(5), pam.d(5), pam(8) AUTHOR
pam_deny was written by Andrew G. Morgan <morgan@kernel.org> Linux-PAM Manual 04/01/2010 PAM_DENY(8)
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