CVE-2021-38155
OpenStack Keystone allows information disclosure during account locking
Description
OpenStack Keystone 10.x through 16.x before 16.0.2, 17.x before 17.0.1, 18.x before 18.0.1, and 19.x before 19.0.1 allows information disclosure during account locking (related to PCI DSS features). By guessing the name of an account and failing to authenticate multiple times, any unauthenticated actor could both confirm the account exists and obtain that account's corresponding UUID, which might be leveraged for other unrelated attacks. All deployments enabling security_compliance.lockout_failure_attempts are affected.
How to fix CVE-2021-38155
To remediate CVE-2021-38155, upgrade the affected package to a fixed version below.
- —upgrade to 2:18.0.0-3+deb11u1 or later
- —upgrade to 16.0.2 or later
Is CVE-2021-38155 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2:18.0.0-3+deb11u1
- >= 10.0, < 16.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |