Bug 100504
| Summary: | authconfig addition to pam.d/system-auth prevents local users from logging in when ldap server cannot be contacted | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Brad Smith <brads> |
| Component: | authconfig | Assignee: | Tomas Mraz <tmraz> |
| Status: | CLOSED DUPLICATE | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2004-10-15 07:44:36 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This problem seems to be in the process of being dealt with as bug #55193. Additional commentary should probably be added to that thread. |
Description of problem: No users, including local users, including root, can log in to the system if it has been configured by authconfig to use ldap and the ldap server becomes unavailable. Version-Release number of selected component (if applicable): RH9 Steps to Reproduce: 1. Use authconfig to set up a system to use ldap authentication (not just user info), but give it a bogus ldap server 2. Attempt to log in as root (or anyone else) 3. Hope that you remembered to keep an already logged-in session open. =:) Additional info: Bug has shown up under a number of other components, ex: bug #77575. Proposed solution: The solution to this problem was found by one of my students. Authconfig adds the following line to /etc/pam.d/system-auth: account [default=bad success=ok user_unknown=ignore service_err=ignore system_err=ignore] /lib/security/$ISA/pam_ldap.so That line should read: account [default=bad success=ok user_unknown=ignore service_err=ignore system_err=ignore authinfo_unavail=ignore] /lib/security/$ISA/pam_ldap.so The addition of 'authinfo_unavail=ignore' to the line will cause pam_ldap.so to return an 'ignore' value instead of the default 'bad' when it cannot contact the server.