Reversible One-Way Hash Affecting krb5-libs package, versions <0:1.15.1-55.amzn2.2.9


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.33% (26th percentile)

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  • Snyk IDSNYK-AMZN2-KRB5LIBS-12508206
  • published5 Sept 2025
  • disclosed15 Apr 2025

Introduced: 15 Apr 2025

CVE-2025-3576  (opens in a new tab)
CWE-328  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 krb5-libs to version 0:1.15.1-55.amzn2.2.9 or higher.
This issue was patched in ALAS2-2025-2985.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-libs package and not the krb5-libs package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1