USN-4171-1: Apport vulnerabilities

30 October 2019

apport vulnerabilities

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • 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

Kevin Backhouse discovered Apport would read its user-controlled settings file as the root user. This could be used by a local attacker to possibly crash Apport or have other unspecified consequences. (CVE-2019-11481)

Sander Bos discovered a race-condition in Apport during core dump creation. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11482)

Sander Bos discovered Apport mishandled crash dumps originating from containers. This could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-11483)

Sander Bos discovered Apport mishandled lock-file creation. This could be used by a local attacker to cause a denial of service against Apport. (CVE-2019-11485)

Kevin Backhouse discovered Apport read various process-specific files with elevated privileges during crash dump generation. This could could be used by a local attacker to generate a crash report for a privileged process that is readable by an unprivileged user. (CVE-2019-15790)

Update instructions

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

Ubuntu 19.10
apport - 2.20.11-0ubuntu8.1
python-apport - 2.20.11-0ubuntu8.1
python3-apport - 2.20.11-0ubuntu8.1
Ubuntu 19.04
apport - 2.20.10-0ubuntu27.2
python-apport - 2.20.10-0ubuntu27.2
python3-apport - 2.20.10-0ubuntu27.2
Ubuntu 18.04 LTS
apport - 2.20.9-0ubuntu7.8
python-apport - 2.20.9-0ubuntu7.8
python3-apport - 2.20.9-0ubuntu7.8
Ubuntu 16.04 LTS
apport - 2.20.1-0ubuntu2.20
python-apport - 2.20.1-0ubuntu2.20
python3-apport - 2.20.1-0ubuntu2.20

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References