[USN-4315-1] Apport vulnerabilities

[Alex Murray]

==========================================================================
Ubuntu Security Notice USN-4315-1
April 02, 2020

apport vulnerabilities
==========================================================================

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

- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Apport.

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

Details:

Maximilien Bourgeteau discovered that the Apport lock file was created with
insecure permissions. This could allow a local attacker to escalate their
privileges via a symlink attack. (CVE-2020-8831)

Maximilien Bourgeteau discovered a race condition in Apport when setting
crash report permissions. This could allow a local attacker to read
arbitrary files via a symlink attack.  (CVE-2020-8833)

Update instructions:

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

Ubuntu 19.10:
  apport                          2.20.11-0ubuntu8.8
  python-apport                   2.20.11-0ubuntu8.8
  python3-apport                  2.20.11-0ubuntu8.8

Ubuntu 18.04 LTS:
  apport                          2.20.9-0ubuntu7.14
  python-apport                   2.20.9-0ubuntu7.14
  python3-apport                  2.20.9-0ubuntu7.14

Ubuntu 16.04 LTS:
  apport                          2.20.1-0ubuntu2.23
  python-apport                   2.20.1-0ubuntu2.23
  python3-apport                  2.20.1-0ubuntu2.23

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

References:
  https://usn.ubuntu.com/4315-1
  CVE-2020-8831, CVE-2020-8833

Package Information:
  https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu8.8
  https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.14
  https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.23
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