Ubuntu: 4171-3 Moderate: Apport Regression Causes Denial of Service

ubuntu

November 5, 2019

USN-4171-1 introduced a regression in Apport.

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. The update caused a regression

in the Python Apport library. 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 un...

Read the Full Advisory

Topics Covered

security advisory denial of service update Ubuntu local attack regression apport

Update Instructions

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

Ubuntu 19.10:
  apport                          2.20.11-0ubuntu8.2
  python-apport                   2.20.11-0ubuntu8.2
  python3-apport                  2.20.11-0ubuntu8.2

Ubuntu 19.04:
  apport                          2.20.10-0ubuntu27.3
  python-apport                   2.20.10-0ubuntu27.3
  python3-apport                  2.20.10-0ubuntu27.3

Ubuntu 18.04 LTS:
  apport                          2.20.9-0ubuntu7.9
  python-apport                   2.20.9-0ubuntu7.9
  python3-apport                  2.20.9-0ubuntu7.9

Ubuntu 16.04 LTS:
  apport                          2.20.1-0ubuntu2.21
  python-apport                   2.20.1-0ubuntu2.21
  python3-apport                  2.20.1-0ubuntu2.21

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