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Description of problem:
With pam_tally2, the faillog command has been deprecated and removed. However, pam_tally2 and faillock commands lack the ability to PREVENT select accounts from becoming locked after the failed password limit has been reached.
Version-Release number of selected component (if applicable):
faillog command appears to be removed in:
RHEL 6.1, RHEL 5.8, Fedora ?
pam-1.1.1-8.el6.src.rpm
Errata RHBA-2011:0685-1
BZ 675168
How reproducible:
Add the following lines to the appropriate order in /etc/pam.d/system-auth and /etc/pam.d/login files
auth required pam_tally2.so deny=3 onerr=fail
account required pam_tally2.so
After 3 failed login attempts the local account will be correctly locked. However, there is no method to prevent select local accounts from being excluded from this rule.
Previously, one could use the faillog -m -1 --user USERNAME to prevent select accounts from becoming locked. With faillog removed, this functionality is no longer available.
Strategic TAM customer has brought this to our attention as it significantly impacts their Security and Audit processes.
A Google search for (pam_tally2 prevent lockout) will provide multiple links of others running into this issue as well.
You can at least do it by skipping over the pam_tally2 module for the user with pam_succeed_if.so or pam_listfile.so module - such as:
auth [success=1 default=ignore] pam_succeed_if.so user in u1:u2:u3
auth required pam_tally2.so deny=3 onerr=fail
I have requested the customer to evaluate and test the following options to ensure that it continues to evaluate the pam_ldap requirements as well.
I am not sure it will pass their audit requirements as it is bypassing pam_tally2 and therefore not incrementing failed attempts. We will see how the customer responds. Thanks for your feedback.
1. add these local accounts to a local group (slm_local_exclusions)
auth [success=1 default=ignore] pam_succeed_if.so user ingroup slm_local_exclusions
2. add user,host combination to a netgroup (slm_local_exclusions)
auth [success=1 default=ignore] pam_succeed_if.so user innetgr slm_local_exclusions
3. use a file containing a list of users, one per line: /etc/pam.d/slm_local_exclusions
auth [success=1 default=ignore] pam_listfile.so item=user sense=allow file=/etc/pam.d/slm_local_exclusions
Comment 7RHEL Program Management
2012-12-14 06:47:26 UTC
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.