cve-2020-8833
Vulnerability from cvelistv5
Published
2020-04-22 21:15
Modified
2024-09-16 20:53
Severity ?
EPSS score ?
Summary
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.
References
▼ | URL | Tags | |
---|---|---|---|
security@ubuntu.com | https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933 | Exploit, Third Party Advisory | |
security@ubuntu.com | https://usn.ubuntu.com/4315-1/ | Third Party Advisory | |
security@ubuntu.com | https://usn.ubuntu.com/4315-2/ | Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933 | Exploit, Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://usn.ubuntu.com/4315-1/ | Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://usn.ubuntu.com/4315-2/ | Third Party Advisory |
Impacted products
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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.