Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: 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. CVE-2025-24528: krb5: overflow when calculating ulog block size
Fixed packages 15
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | krb5-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-debugsource | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-devel | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-libs | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-libs-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-pkinit | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-pkinit-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-server | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-server-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-server-ldap | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-server-ldap-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-workstation | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | krb5-workstation-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | libkadm5 | 0:1.21.3-6.amzn2023.0.1 |
| Amazon Linux · 2023 | libkadm5-debuginfo | 0:1.21.3-6.amzn2023.0.1 |
Vulnerabilities 2
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High 7.1
In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large updat…
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Medium 5.9
Krb5: kerberos rc4-hmac-md5 checksum vulnerability enabling message spoofing via md5 collisions
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 …