An Ark security update has been released for Ubuntu Linux 20.04 LTS, 18.04 LTS, and 16.04 LTS.

USN-4482-1: Ark vulnerability

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Ubuntu Security Notice USN-4482-1
September 01, 2020

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Ark could be made to write files as your login if it opened a specially
crafted file.

Software Description:
- ark: archive utility

Details:

Fabian Vogt discovered that Ark incorrectly handled symbolic links in
tar archive files. An attacker could use this to construct a malicious
tar archive that, when opened, would create files outside the extraction
directory.

Update instructions:

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

Ubuntu 20.04 LTS:
ark 4:19.12.3-0ubuntu1.2

Ubuntu 18.04 LTS:
ark 4:17.12.3-0ubuntu1.2

Ubuntu 16.04 LTS:
ark 4:15.12.3-0ubuntu1.2

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

References:
  https://usn.ubuntu.com/4482-1
CVE-2020-24654

Package Information:
  https://launchpad.net/ubuntu/+source/ark/4:19.12.3-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/ark/4:17.12.3-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/ark/4:15.12.3-0ubuntu1.2