CVE-2020-8833: Apport race condition in crash report permissions
First published: Wed Apr 22 2020(Updated: )
Last updated 24 July 2024
Credit: security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =19.10 | |
| Ubuntu Python3-apport |
Remedy
This ability to exploit this is likely mitigated by the Ubuntu default of fs.protected_symlinks=1
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Reference Links
- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933
- https://usn.ubuntu.com/4315-1/
- https://usn.ubuntu.com/4315-2/
- https://launchpad.net/bugs/cve/CVE-2020-8833
- https://security-tracker.debian.org/tracker/CVE-2020-8833
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8833
- https://nvd.nist.gov/vuln/detail/CVE-2020-8833
- https://ubuntu.com/security/CVE-2020-8833
Frequently Asked Questions
What is the severity of CVE-2020-8833?
CVE-2020-8833 is classified as a medium severity vulnerability due to its potential for privilege escalation.
How do I fix CVE-2020-8833?
To mitigate CVE-2020-8833, ensure that fs.protected_symlinks is enabled in the system configuration.
Which versions of Ubuntu are affected by CVE-2020-8833?
CVE-2020-8833 affects Ubuntu 14.04, 16.04, 18.04, and 19.10.
What type of vulnerability is CVE-2020-8833?
CVE-2020-8833 is a Time-of-check Time-of-use (TOCTOU) race condition vulnerability.
Can CVE-2020-8833 be exploited remotely?
CVE-2020-8833 requires local access to the system to exploit, making remote exploitation unlikely.
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