Bug 2370259

Summary: Do not block HMAC-MD4/5 in FIPS mode [fedora-all]
Product: [Fedora] Fedora Reporter: Julien Rische <jrische>
Component: krb5Assignee: Julien Rische <jrische>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: rawhideCC: abokovoy, antorres, ftrivino, jrische, j, sbose, ssorce
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: krb5-1.21.3-6.fc43 krb5-1.21.3-5.fc41 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2025-06-06 14:17:11 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:

Description Julien Rische 2025-06-04 15:50:11 UTC
To ensure RC4 HMAC-MD5 was not used in FIPS mode, access to HMAC-MD4/5 is not allowed in this mode. However, since we provide the "[libdefaults]radius_md5_fips_override" configuration parameter to allow using RADIUS regardless to the FIPS restrictions, we should allow HMAC-MD5 to be used too in this case, because it is required for the newly supported Message-Authenticator attribute. Having an exception for MD5 alone, but not for HMAC-MD5 does not make sense.

Reproducible: Always

Comment 1 Fedora Update System 2025-06-06 12:54:13 UTC
FEDORA-2025-1c915db8a5 (krb5-1.21.3-6.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-1c915db8a5

Comment 2 Fedora Update System 2025-06-06 14:17:11 UTC
FEDORA-2025-1c915db8a5 (krb5-1.21.3-6.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 3 Fedora Update System 2025-06-06 15:10:03 UTC
FEDORA-2025-3de9fe91ff (krb5-1.21.3-6.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-3de9fe91ff

Comment 4 Fedora Update System 2025-06-06 15:12:37 UTC
FEDORA-2025-42a13f896e (krb5-1.21.3-5.fc41) has been submitted as an update to Fedora 41.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-42a13f896e

Comment 5 Fedora Update System 2025-06-07 07:11:08 UTC
FEDORA-2025-42a13f896e has been pushed to the Fedora 41 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-42a13f896e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-42a13f896e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2025-06-07 08:25:56 UTC
FEDORA-2025-3de9fe91ff has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2025-3de9fe91ff`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2025-3de9fe91ff

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2025-06-09 02:35:16 UTC
FEDORA-2025-3de9fe91ff (krb5-1.21.3-6.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2025-06-10 02:59:22 UTC
FEDORA-2025-42a13f896e (krb5-1.21.3-5.fc41) has been pushed to the Fedora 41 stable repository.
If problem still persists, please make note of it in this bug report.