[USN-4315-2] Apport vulnerabilities

[Leonidas S. Barbosa]

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Ubuntu Security Notice USN-4315-2
June 15, 2020

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

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in Apport.

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

Details:

USN-4315-1 fixed several vulnerabilities in Apport. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory 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 14.04 ESM:
  apport                          2.14.1-0ubuntu3.29+esm4
  python-apport                   2.14.1-0ubuntu3.29+esm4
  python3-apport                  2.14.1-0ubuntu3.29+esm4

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

References:
  https://usn.ubuntu.com/4315-2
  https://usn.ubuntu.com/4315-1
  CVE-2020-8831, CVE-2020-8833
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