USN-5959-1: Kerberos vulnerabilities

16 March 2023

Several security issues were fixed in Kerberos.

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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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 20.04
Ubuntu 18.04

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

References

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Further reading