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Ubuntu: (Multiple Advisories) (CVE-2020-8831): Apport vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-8831): Apport vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
04/02/2020
Created
04/07/2020
Added
04/03/2020
Modified
03/22/2023

Description

Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport's lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.

Solution(s)

  • ubuntu-upgrade-apport
  • ubuntu-upgrade-python-apport
  • ubuntu-upgrade-python3-apport

References

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