[USN-4171-4] Apport regression
Leonidas S. Barbosa
leo.barbosa at canonical.com
Tue Nov 5 14:44:50 UTC 2019
Ubuntu Security Notice USN-4171-4
November 05, 2019
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
USN-4171-2 introduced a regression in Apport.
- apport: automatically generate crash reports for debugging
USN-4171-2 fixed a vulnerability in Apport. The update caused a regression
in the Python Apport library. This update fixes the problem for Ubuntu 14.04 ESM.
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.
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.
Sander Bos discovered Apport mishandled lock-file creation. This could be
used by a local attacker to cause a denial of service against Apport.
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)
The problem can be corrected by updating your system to the following
Ubuntu 14.04 ESM:
In general, a standard system update will make all the necessary changes.
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