USN-5257-2: ldns vulnerabilities

Publication date

4 October 2022

Overview

ldns could be made to expose sensitive information if it received a specially crafted input.


Packages

  • ldns - ldns library for DNS programming

Details

USN-5257-1 fixed several vulnerabilities in ldns. This update provides
the corresponding update for Ubuntu 20.04 ESM and Ubuntu 22.04 ESM.

Original advisory details:

It was discovered that ldns incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2020-19860, CVE-2020-19861)

USN-5257-1 fixed several vulnerabilities in ldns. This update provides
the corresponding update for Ubuntu 20.04 ESM and Ubuntu 22.04 ESM.

Original advisory details:

It was discovered that ldns incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2020-19860, CVE-2020-19861)

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
22.04 jammy libldns3 –  1.7.1-2ubuntu4+esm1  
20.04 focal libldns2 –  1.7.0-4.1ubuntu1+esm1  

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