Time-of-check Time-of-use (TOCTOU) Affecting apport package, versions <2.20.11-0ubuntu22
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Test your applications- Snyk ID SNYK-UBUNTU2004-APPORT-584275
- published 2 Apr 2020
- disclosed 22 Apr 2020
Introduced: 2 Apr 2020
CVE-2020-8833 Open this link in a new tabHow to fix?
Upgrade Ubuntu:20.04 apport to version 2.20.11-0ubuntu22 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream apport package and not the apport package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
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.