An Apport regression update has been released for Ubuntu Linux 19.10, 18.04 LTS, and 16.04 LTS.
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Ubuntu Security Notice USN-4171-5
March 18, 2020
apport regression
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
- 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. This caused a regression in
autopkgtest and python2 compatibility. 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 2.20.11-0ubuntu8.6
python-apport 2.20.11-0ubuntu8.6
python3-apport 2.20.11-0ubuntu8.6
Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.12
python-apport 2.20.9-0ubuntu7.12
python3-apport 2.20.9-0ubuntu7.12
Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.22
python-apport 2.20.1-0ubuntu2.22
python3-apport 2.20.1-0ubuntu2.22
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4171-5
https://usn.ubuntu.com/4171-1
https://launchpad.net/bugs/1851806, https://launchpad.net/bugs/1854237
Package Information:
https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu8.6
https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.12
https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.22
