USN-4720-1: Apport vulnerabilities

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• apport - automatically generate crash reports for debugging

Details

Itai Greenhut discovered that Apport incorrectly parsed certain files in
the /proc filesystem. A local attacker could use this issue to escalate
privileges and run arbitrary code. (CVE-2021-25682, CVE-2021-25683)

Itai Greenhut discovered that Apport incorrectly handled opening certain
special files. A local attacker could possibly use this issue to cause
Apport to hang, resulting in a denial of service. (CVE-2021-25684)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.10

• apport - 2.20.11-0ubuntu50.5
• python3-apport - 2.20.11-0ubuntu50.5

Ubuntu 20.04

• apport - 2.20.11-0ubuntu27.16
• python3-apport - 2.20.11-0ubuntu27.16

Ubuntu 18.04

• apport - 2.20.9-0ubuntu7.23
• python-apport - 2.20.9-0ubuntu7.23
• python3-apport - 2.20.9-0ubuntu7.23

Ubuntu 16.04

• apport - 2.20.1-0ubuntu2.30
• python-apport - 2.20.1-0ubuntu2.30
• python3-apport - 2.20.1-0ubuntu2.30

In general, a standard system update will make all the necessary changes.

References

• CVE-2021-25683
• CVE-2021-25682
• CVE-2021-25684

Related notices

• USN-4720-2: python3-problem-report, python-apport, apport, apport-retrace, apport-noui, python3-apport, python-problem-report, dh-apport, apport-kde, apport-gtk, apport-valgrind