USN-4171-5: Apport regression

18 March 2020

apport regression

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

  • Ubuntu 19.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

USN-4171-1 introduced a regression in Apport.

Software Description

  • apport - automatically generate crash reports for debugging

Details

USN-4171-1 fixed vulnerabilities in Apport. This caused a regression in autopkgtest and python2 compatibility. This update fixes the problem.

We apologize for the inconvenience.

Original advisory 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 - 2.20.11-0ubuntu8.6
python-apport - 2.20.11-0ubuntu8.6
python3-apport - 2.20.11-0ubuntu8.6
Ubuntu 18.04 LTS
apport - 2.20.9-0ubuntu7.12
python-apport - 2.20.9-0ubuntu7.12
python3-apport - 2.20.9-0ubuntu7.12
Ubuntu 16.04 LTS
apport - 2.20.1-0ubuntu2.22
python-apport - 2.20.1-0ubuntu2.22
python3-apport - 2.20.1-0ubuntu2.22

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