USN-3480-2: Apport regressions

Ubuntu Security Notice USN-3480-2

20th November, 2017

apport regressions

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

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS

Summary

USN-3480-1 introduced regressions in Apport.

Software description

  • apport - automatically generate crash reports for debugging

Details

USN-3480-1 fixed vulnerabilities in Apport. The fix for CVE-2017-14177
introduced a regression in the ability to handle crashes for users that
configured their systems to use the Upstart init system in Ubuntu 16.04
LTS and Ubuntu 17.04. The fix for CVE-2017-14180 temporarily disabled
crash forwarding to containers. This update addresses the problems.

We apologize for the inconvenience.

Original advisory details:

Sander Bos discovered that Apport incorrectly handled core dumps for setuid
binaries. A local attacker could use this issue to perform a denial of service
via resource exhaustion or possibly gain root privileges. (CVE-2017-14177)

Sander Bos discovered that Apport incorrectly handled core dumps for processes
in a different PID namespace. A local attacker could use this issue to perform
a denial of service via resource exhaustion or possibly gain root privileges.
(CVE-2017-14180)

Update instructions

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

Ubuntu 17.10:
apport 2.20.7-0ubuntu3.5
Ubuntu 17.04:
apport 2.20.4-0ubuntu4.8
Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.13

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

LP: 1726372, LP: 1732518