Public vulnerability disclosure
CVE-2025-3576
Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
publishedCWE-328
A vulnerability in the MIT Kerberos implementation allows GSSAPI-protected messages using RC4-HMAC-MD5 to be spoofed due to weaknesses in the MD5 checksum design. If RC4 is preferred over stronger encryption types, an attacker could exploit MD5 collisions to forge message integrity codes. This may lead to unauthorized message tampering.
Technical severity5.9 mediumCVSS 3.1 · CNA: redhat
Published2025-04-15Source updated 2026-11-05
Collected2026-11-052 attributed sources
Fixes and workarounds
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
krb5
https://web.mit.edu/kerberos/ |
≥ 0; < 1.22 (affected, semver)
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 10 Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.21.3-8.el10_0; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-32.el8_10; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.17-19.el8_2.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-9.el8_4.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-9.el8_4.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-16.el8_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-16.el8_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-16.el8_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-26.el8_8.5; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.2-26.el8_8.5; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.21.1-8.el9_6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.19.1-16.el9_0.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.20.1-9.el9_2.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.4 Extended Update Support Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.21.1-2.el9_4.2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Discovery 2 Red Hat discovery/discovery-server-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 2.0.0-1752592913; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat krb5
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| RUGGEDCOM ROX MX5000 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX MX5000RE Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1400 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1500 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1501 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1510 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1511 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1512 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1524 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX1536 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| RUGGEDCOM ROX RX5000 Siemens |
≥ 0; < V2.17.1 (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.9 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2025:11487CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:13664CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:13777CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:15000CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:15001CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:15002CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:15003CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:15004CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:8411CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:9418CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2025:9430CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-3576CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2359465CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://web.mit.edu/kerberos/krb5-1.22/krb5-1.22.htmlCNA: redhat
- https://lists.debian.org/debian-lts-announce/2025/05/msg00047.htmlADP: CVE
- https://cert-portal.siemens.com/productcert/html/ssa-577017.htmlADP: siemens-SADP
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