An APR security update has been released for Ubuntu Linux 1404 ESM, 16.04 ESM, and 21.04.

USN-5056-1: APR vulnerability

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Ubuntu Security Notice USN-5056-1
August 30, 2021

apr vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

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

Software Description:
- apr: Apache Portable Runtime Library

Details:

It was discovered that APR incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.

Update instructions:

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

Ubuntu 21.04:
libapr1 1.7.0-6ubuntu0.1

Ubuntu 16.04 ESM:
libapr1 1.5.2-3ubuntu0.1~esm1

Ubuntu 14.04 ESM:
libapr1 1.5.0-1ubuntu0.1~esm1

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

References:
  https://ubuntu.com/security/notices/USN-5056-1
CVE-2021-35940

Package Information:
  https://launchpad.net/ubuntu/+source/apr/1.7.0-6ubuntu0.1