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

USN-4449-1: Apport vulnerabilities

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Ubuntu Security Notice USN-4449-1
August 04, 2020

apport vulnerabilities
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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:

Several security issues were fixed in Apport.

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

Details:

Ryota Shiga discovered that Apport incorrectly dropped privileges when
making certain D-Bus calls. A local attacker could use this issue to read
arbitrary files. (CVE-2020-11936)

Seong-Joong Kim discovered that Apport incorrectly parsed configuration
files. A local attacker could use this issue to cause Apport to crash,
resulting in a denial of service. (CVE-2020-15701)

Ryota Shiga discovered that Apport incorrectly implemented certain checks.
A local attacker could use this issue to escalate privileges and run
arbitrary code. (CVE-2020-15702)

Update instructions:

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

Ubuntu 20.04 LTS:
apport 2.20.11-0ubuntu27.6
python3-apport 2.20.11-0ubuntu27.6

Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.16
python-apport 2.20.9-0ubuntu7.16
python3-apport 2.20.9-0ubuntu7.16

Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.24
python-apport 2.20.1-0ubuntu2.24
python3-apport 2.20.1-0ubuntu2.24

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

References:
  https://usn.ubuntu.com/4449-1
CVE-2020-11936, CVE-2020-15701, CVE-2020-15702

Package Information:
  https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu27.6
  https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.16
  https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.24