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

ark vulnerability
==========================================================================

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
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