USN-7314-1: Kerberos vulnerabilities

USN-7314-1: Kerberos vulnerabilities
3 March 2025

Several security issues were fixed in Kerberos.

Releases
Ubuntu 24.10 Ubuntu 24.04 LTS Ubuntu 22.04 LTS Ubuntu 20.04 LTS
Packages
krb5 - MIT Kerberos Network Authentication Protocol

Details
It was discovered that Kerberos incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to cause
Kerberos to consume memory,leading to a denial of service. (CVE-2024-26458,
CVE-2024-26461)

It was discovered that Kerberos incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to cause
Kerberos to consume memory,leading to a denial of service. This issue only
affected Ubuntu 24.04 LTS. (CVE-2024-26462)

It was discovered that the Kerberos kadmind daemon incorrectly handled log
files when incremental propagation was enabled. An authenticated attacker
could use this issue to cause kadmind to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2025-24528)

Update instructions
The problem can be corrected by updating your system to the following package versions:

Ubuntu 24.10

• krb5-admin-server - 1.21.3-3ubuntu0.2
• krb5-kdc - 1.21.3-3ubuntu0.2
• libgssapi-krb5-2 - 1.21.3-3ubuntu0.2
• libgssrpc4t64 - 1.21.3-3ubuntu0.2
• libkdb5-10t64 - 1.21.3-3ubuntu0.2

Ubuntu 24.04

• krb5-admin-server - 1.20.1-6ubuntu2.5
• krb5-kdc - 1.20.1-6ubuntu2.5
• libgssapi-krb5-2 - 1.20.1-6ubuntu2.5
• libgssrpc4t64 - 1.20.1-6ubuntu2.5
• libkdb5-10t64 - 1.20.1-6ubuntu2.5

Ubuntu 22.04

• krb5-admin-server - 1.19.2-2ubuntu0.6
• krb5-kdc - 1.19.2-2ubuntu0.6
• libgssapi-krb5-2 - 1.19.2-2ubuntu0.6
• libgssrpc4 - 1.19.2-2ubuntu0.6
• libkdb5-10 - 1.19.2-2ubuntu0.6

Ubuntu 20.04

• krb5-admin-server - 1.17-6ubuntu4.9
• krb5-kdc - 1.17-6ubuntu4.9
• libgssapi-krb5-2 - 1.17-6ubuntu4.9
• libgssrpc4 - 1.17-6ubuntu4.9
• libkdb5-9 - 1.17-6ubuntu4.9

In general, a standard system update will make all the necessary changes.