SUSE-SU-2025:3698-1

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Source
https://www.suse.com/support/update/announcement/2025/suse-su-20253698-1/
Import Source
https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2025:3698-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/SUSE-SU-2025:3698-1
Upstream
Related
Published
2025-10-21T10:07:22Z
Modified
2025-10-21T20:34:10.759013Z
Summary
Security update for krb5
Details

This update for krb5 fixes the following issues:

  • CVE-2025-3576: weakness in the MD5 checksum design allows for spoofing of GSSAPI-protected messages that are using RC4-HMAC-MD5 (bsc#1241219).

Krb5 as very old protocol supported quite a number of ciphers that are not longer up to current cryptographic standards.

To avoid problems with those, SUSE has by default now disabled those alorithms.

The following algorithms have been removed from valid krb5 enctypes:

  • des3-cbc-sha1
  • arcfour-hmac-md5

To reenable those algorithms, you can use allow options in krb5.conf:

[libdefaults] allowdes3 = true allowrc4 = true

to reenable them.

References

Affected packages

SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 / krb5

Package

Name
krb5
Purl
pkg:rpm/suse/krb5&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.16.3-46.21.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-devel": "1.16.3-46.21.1",
            "krb5-32bit": "1.16.3-46.21.1",
            "krb5-plugin-preauth-pkinit": "1.16.3-46.21.1",
            "krb5-doc": "1.16.3-46.21.1",
            "krb5-server": "1.16.3-46.21.1",
            "krb5-plugin-preauth-otp": "1.16.3-46.21.1",
            "krb5": "1.16.3-46.21.1",
            "krb5-client": "1.16.3-46.21.1",
            "krb5-plugin-kdb-ldap": "1.16.3-46.21.1"
        }
    ]
}