CVE-2025-3576 (CVSS 5.9)

Description

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.

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CVSS v3.1 Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-328 CWE-328

References

Other References

https://access.redhat.com/errata/RHSA-2025:11487 https://access.redhat.com/errata/RHSA-2025:13664 https://access.redhat.com/errata/RHSA-2025:13777 https://access.redhat.com/errata/RHSA-2025:15000 https://access.redhat.com/errata/RHSA-2025:15001 https://access.redhat.com/errata/RHSA-2025:15002 https://access.redhat.com/errata/RHSA-2025:15003 https://access.redhat.com/errata/RHSA-2025:15004 https://access.redhat.com/errata/RHSA-2025:8411 https://access.redhat.com/errata/RHSA-2025:9418

Frequently Asked Questions

What is CVE-2025-3576? +

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. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2025-3576? +

CVE-2025-3576 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-3576? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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