SUSE-SU-2025:3699-1

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Source
https://www.suse.com/support/update/announcement/2025/suse-su-20253699-1/
Import Source
https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2025:3699-1.json
JSON Data
https://api.osv.dev/v1/vulns/SUSE-SU-2025:3699-1
Upstream
Related
Published
2025-10-21T10:07:48Z
Modified
2025-10-22T18:32:27.540303Z
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

openSUSE:Leap 15.6

krb5

Package

Name
krb5
Purl
pkg:rpm/opensuse/krb5&distro=openSUSE%20Leap%2015.6

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-150600.11.14.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-server": "1.20.1-150600.11.14.1",
            "krb5-32bit": "1.20.1-150600.11.14.1",
            "krb5-devel-32bit": "1.20.1-150600.11.14.1",
            "krb5": "1.20.1-150600.11.14.1",
            "krb5-plugin-kdb-ldap": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-spake": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-otp": "1.20.1-150600.11.14.1",
            "krb5-devel": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-pkinit": "1.20.1-150600.11.14.1",
            "krb5-client": "1.20.1-150600.11.14.1"
        }
    ]
}

SUSE:Linux Enterprise Module for Basesystem 15 SP6

krb5

Package

Name
krb5
Purl
pkg:rpm/suse/krb5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-150600.11.14.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-32bit": "1.20.1-150600.11.14.1",
            "krb5-client": "1.20.1-150600.11.14.1",
            "krb5-devel": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-pkinit": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-otp": "1.20.1-150600.11.14.1",
            "krb5": "1.20.1-150600.11.14.1"
        }
    ]
}

SUSE:Linux Enterprise Module for Basesystem 15 SP7

krb5

Package

Name
krb5
Purl
pkg:rpm/suse/krb5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-150600.11.14.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-32bit": "1.20.1-150600.11.14.1",
            "krb5-client": "1.20.1-150600.11.14.1",
            "krb5-devel": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-pkinit": "1.20.1-150600.11.14.1",
            "krb5-plugin-preauth-otp": "1.20.1-150600.11.14.1",
            "krb5": "1.20.1-150600.11.14.1"
        }
    ]
}

SUSE:Linux Enterprise Module for Server Applications 15 SP6

krb5

Package

Name
krb5
Purl
pkg:rpm/suse/krb5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP6

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-150600.11.14.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-plugin-kdb-ldap": "1.20.1-150600.11.14.1",
            "krb5-server": "1.20.1-150600.11.14.1"
        }
    ]
}

SUSE:Linux Enterprise Module for Server Applications 15 SP7

krb5

Package

Name
krb5
Purl
pkg:rpm/suse/krb5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-150600.11.14.1

Ecosystem specific 

{
    "binaries": [
        {
            "krb5-plugin-kdb-ldap": "1.20.1-150600.11.14.1",
            "krb5-server": "1.20.1-150600.11.14.1"
        }
    ]
}