USN-4315-1: Apport vulnerabilities

Releases

• Ubuntu 19.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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

• apport - 2.20.9-0ubuntu7.14
• python-apport - 2.20.9-0ubuntu7.14
• python3-apport - 2.20.9-0ubuntu7.14

Ubuntu 16.04

• 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

• CVE-2020-8831
• CVE-2020-8833

Related notices

• USN-4315-2: apport, python-problem-report, python3-problem-report, apport-gtk, apport-retrace, apport-valgrind, python-apport, apport-noui, dh-apport, apport-kde, python3-apport