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Bug 2228558

Summary: pam_pwhistory remembers one extra password than specified
Product: Red Hat Enterprise Linux 7 Reporter: Chance Callahan <ccallaha>
Component: pamAssignee: Iker Pedrosa <ipedrosa>
Status: CLOSED MIGRATED QA Contact: sssd-qe
Severity: medium Docs Contact:
Priority: unspecified    
Version: 7.5CC: aboscatt, pbrezina
Target Milestone: rcKeywords: MigratedToJIRA
Target Release: ---Flags: pm-rhel: mirror+
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-09-14 08:43:50 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Chance Callahan 2023-08-02 16:43:36 UTC
Description of problem:

A customer came to us with the following bug: on RHEL 6, if they told pam_pwhistory to remember the last five passwords, it would remember them. If they give the same instruction to the PAM module on RHEL 7.5, it remembers the last six passwords instead of five.

Version-Release number of selected component (if applicable):

* pam-1.1.8-22.el7.x86_64

How reproducible:

I did not personally reproduce it, but the customer has indicated it's affecting multiple systems.

Steps to Reproduce:
1. Enable pam_pwhistory
2. Set it to remember the last five passwords.
3. Change password five times.
4. Try using the original password again.

Actual results:

(per customer) pam_pwhistory remembers the last six passwords instead of the last five.

Expected results:

pam_pwhistory only recalls the last five passwords.

Comment 3 Iker Pedrosa 2023-08-07 10:19:36 UTC
I tried reproducing the error in RHEL7 and it's working as expected. So, I'm wondering, maybe there was a problem in RHEL6 and it was fixed for RHEL7.

Steps:
1- Set 6 different passwords for a user.
2- Change the password to the second one -> Fails because we are reusing a password.
3- Change the password to the first one -> Succeeds.

Can you provide any additional information?

Comment 4 Chance Callahan 2023-08-07 16:25:11 UTC
Did you try on 7.9 or 7.5?

Comment 5 Iker Pedrosa 2023-08-08 06:40:28 UTC
I don't know the exact RHEL version but I know I was using pam-1.1.8-22

Comment 6 Andre Boscatto 2023-09-14 08:29:36 UTC
Hi Chance,

Can you help us with the reproducer? As Iker mentioned, he was using the same pam version as stated in the description, but it worked as expected.

Kindly

Comment 7 RHEL Program Management 2023-09-14 08:30:11 UTC
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 8 RHEL Program Management 2023-09-14 08:43:50 UTC
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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Comment 9 Red Hat Bugzilla 2024-01-13 04:25:36 UTC
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days