CVE-2016-4911
OpenStack Identity Keystone Improper Access Control
4.3
MEDIUM
CVSS 3.1
EPSS 0.30%
Description
The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token.
How to fix CVE-2016-4911
To remediate CVE-2016-4911, upgrade the affected package to a fixed version below.
- Debian/keystone—upgrade to 2:9.0.0-2 or later
- —upgrade to 9.0.1 or later
- —upgrade to 9.0.1 or later
Is CVE-2016-4911 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2:9.0.0-2
- >= 9.0.0, < 9.0.1
- >= 9.0.0, < 9.0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |