=========================================================================Ubuntu Security Notice USN-4169-1
October 29, 2019

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

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

libarchive could be made to execute arbitrary code if it received
specially crafted archive file.

Software Description:
- libarchive: Library to read/write archive files

Details:

It was discovered that libarchive incorrectly handled certain archive files.
An attacker could possibly execute arbitrary code.

Update instructions:

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

Ubuntu 19.04:
  libarchive13                    3.3.3-4ubuntu0.1

Ubuntu 18.04 LTS:
  libarchive13                    3.2.2-3.1ubuntu0.5

Ubuntu 16.04 LTS:
  libarchive13                    3.1.2-11ubuntu0.16.04.7

Ubuntu 14.04 ESM:
  libarchive13                    3.1.2-7ubuntu2.8+esm1

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

References:
  https://ubuntu.com/security/notices/USN-4169-1
  CVE-2019-18408

Package Information:
  https://launchpad.net/ubuntu/+source/libarchive/3.3.3-4ubuntu0.1
  https://launchpad.net/ubuntu/+source/libarchive/3.2.2-3.1ubuntu0.5
  https://launchpad.net/ubuntu/+source/libarchive/3.1.2-11ubuntu0.16.04.7