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Ubuntu: (Multiple Advisories) (CVE-2020-8833): Apport vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-8833): Apport vulnerabilities

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

Description

Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. 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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