1. Ubuntu Security Notices
  2. USN-5959-1

USN-5959-1: Kerberos vulnerabilities

Publication date

16 March 2023

Overview

Several security issues were fixed in Kerberos.

Releases

Packages

  • krb5 - MIT Kerberos Network Authentication Protocol

Details

It was discovered that Kerberos incorrectly handled memory when processing
KDC data, which could lead to a NULL pointer dereference. An attacker could
possibly use this issue to cause a denial of service or have other
unspecified impacts. (CVE-2021-36222, CVE-2021-37750)

It was discovered that Kerberos incorrectly handled memory when processing
KDC data, which could lead to a NULL pointer dereference. An attacker could
possibly use this issue to cause a denial of service or have other
unspecified impacts. (CVE-2021-36222, CVE-2021-37750)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.04 focal krb5-pkinit –  1.17-6ubuntu4.3
krb5-kdc-ldap –  1.17-6ubuntu4.3
krb5-kdc –  1.17-6ubuntu4.3
krb5-k5tls –  1.17-6ubuntu4.3
18.04 bionic krb5-pkinit –  1.16-2ubuntu0.4
krb5-kdc-ldap –  1.16-2ubuntu0.4
krb5-kdc –  1.16-2ubuntu0.4
krb5-k5tls –  1.16-2ubuntu0.4

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References

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