==========================================================================
Ubuntu Security Notice USN-4315-1
April 02, 2020
apport vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 19.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Apport.
Software Description:
– apport: automatically generate crash reports for debugging
Details:
Maximilien Bourgeteau discovered that the Apport lock file was created with
insecure permissions. This could allow a local attacker to escalate their
privileges via a symlink attack. (CVE-2020-8831)
Maximilien Bourgeteau discovered a race condition in Apport when setting
crash report permissions. This could allow a local attacker to read
arbitrary files via a symlink attack. (CVE-2020-8833)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 19.10:
apport 2.20.11-0ubuntu8.8
python-apport 2.20.11-0ubuntu8.8
python3-apport 2.20.11-0ubuntu8.8
Ubuntu 18.04 LTS:
apport 2.20.9-0ubuntu7.14
python-apport 2.20.9-0ubuntu7.14
python3-apport 2.20.9-0ubuntu7.14
Ubuntu 16.04 LTS:
apport 2.20.1-0ubuntu2.23
python-apport 2.20.1-0ubuntu2.23
python3-apport 2.20.1-0ubuntu2.23
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4315-1
CVE-2020-8831, CVE-2020-8833
Package Information:
https://launchpad.net/ubuntu/+source/apport/2.20.11-0ubuntu8.8
https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.14
https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.23
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