==========================================================================
Ubuntu Security Notice USN-4171-4
November 05, 2019
apport regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 ESM
Summary:
USN-4171-2 introduced a regression in Apport.
Software Description:
– apport: automatically generate crash reports for debugging
Details:
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.
(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 14.04 ESM:
apport 2.14.1-0ubuntu3.29+esm3
python-apport 2.14.1-0ubuntu3.29+esm3
python3-apport 2.14.1-0ubuntu3.29+esm3
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4171-4
https://usn.ubuntu.com/4171-1
https://launchpad.net/bugs/XXXXXX
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