USN-3480-2: Apport regressions

Releases

• Ubuntu 17.10
• Ubuntu 17.04
• Ubuntu 16.04 ESM

Packages

• 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 versions:

Ubuntu 17.10

• apport - 2.20.7-0ubuntu3.5

Ubuntu 17.04

• apport - 2.20.4-0ubuntu4.8

Ubuntu 16.04

• apport - 2.20.1-0ubuntu2.13

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

References

• https://launchpad.net/bugs/1726372
• https://launchpad.net/bugs/1732518