USN-4171-3: Apport regression

apport regression

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

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 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 – 2.20.11-0ubuntu8.2; 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

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

Source: USN-4171-3: Apport regression

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