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Bug 2073040

Summary: login.defs PASS_MIN_LEN is unused
Product: Red Hat Enterprise Linux 9 Reporter: Steve Grubb <sgrubb>
Component: scap-security-guideAssignee: Vojtech Polasek <vpolasek>
Status: CLOSED ERRATA QA Contact: Milan Lysonek <mlysonek>
Severity: low Docs Contact:
Priority: unspecified    
Version: 9.0CC: ggasparb, ipedrosa, jpazdziora, matyc, mhaicman, mlysonek, openscap-maint, vpolasek
Target Milestone: rcKeywords: AutoVerified, Triaged, ZStream
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: scap-security-guide-0.1.62-2.el9 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of:
: 2117611 (view as bug list) Environment:
Last Closed: 2022-11-15 10:25:25 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:
Bug Depends On:    
Bug Blocks: 2117611    

Description Steve Grubb 2022-04-07 14:15:37 UTC
Description of problem:
In /etc/login.defs, there is a variable PASS_MIN_LEN which would appear to set a minimum length for passwords. It is read by only one function in all of shadow-utils. This function is only used by the shadow-utils version of passwd. RHEL and Fedora ship an entirely different passwd program which uses pam to determine the minimum password length. Therefore, any rules that look at or change this setting is entirely unneeded. 

Additional info:
These might be the rules to look into:

    - var_accounts_password_minlen_login_defs=12
    - accounts_password_minlen_login_defs

They can safely be dropped in all content aimed at RHEL & Fedora. I think there may be other distributions which ship the shadow-utils passwd program. If you find any, just allow these rules in their content.

Comment 2 Iker Pedrosa 2022-07-04 13:41:06 UTC
As Steve has already pointed out PASS_MIN_LEN is only used by the shadow-utils passwd, and this binary isn't shipped in RHEL and Fedora. Thus I think that the rule can be removed.

Comment 3 Vojtech Polasek 2022-07-04 13:51:58 UTC
Thanks for confirmation. I will proceed with removal of the rule from RHEL and Fedora profiles.

Comment 5 Vojtech Polasek 2022-07-08 10:41:41 UTC
Fixed upstream:
https://github.com/ComplianceAsCode/content/pull/9113

Comment 16 errata-xmlrpc 2022-11-15 10:25:25 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (scap-security-guide bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:8131