An Apport security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.04.

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Ubuntu Security Notice USN-5077-1
September 14, 2021

apport vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Apport.

Software Description:
- apport: automatically generate crash reports for debugging

Details:

Maik Münch and Stephen Röttger discovered that Apport incorrectly handled
certain information gathering operations. A local attacker could use this
issue to gain read access to arbitrary files, possibly containing sensitive
information.

Update instructions:

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

Ubuntu 21.04:
apport 2.20.11-0ubuntu65.3
python3-apport 2.20.11-0ubuntu65.3

Ubuntu 20.04 LTS:
apport 2.20.11-0ubuntu27.20
python3-apport 2.20.11-0ubuntu27.20

Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.26
python-apport 2.20.9-0ubuntu7.26
python3-apport 2.20.9-0ubuntu7.26

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

References:
  https://ubuntu.com/security/notices/USN-5077-1
CVE-2021-3709, CVE-2021-3710

Package Information:
  https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu65.3
  https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu27.20
  https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.26