Vulnerability · Published Aug 6, 2021 · Assigned by mitre
CVE-2021-38155
High 7.5
In plain English
A high-severity security flaw in the keystone package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | keystone | 2:19.0.0-3 | DEBIAN-CVE-2021-38155 |
| Debian:13 | keystone | 2:19.0.0-3 | DEBIAN-CVE-2021-38155 |
| Debian:14 | keystone | 2:19.0.0-3 | DEBIAN-CVE-2021-38155 |
| PyPI | keystone | 19.0.1 | GHSA-4225-97pr-rr52 |
| PyPI | keystone | 16.0.2 | GHSA-4225-97pr-rr52 |
| PyPI | keystone | 16.0.2, 17.0.1, 18.0.1, 19.0.1 | PYSEC-2026-830 |
| PyPI | keystone | 17.0.1 | GHSA-4225-97pr-rr52 |
| PyPI | keystone | 18.0.1 | GHSA-4225-97pr-rr52 |
Affected products (as reported)
References
- https://launchpad.net/bugs/1688137
- https://security.openstack.org/ossa/OSSA-2021-003.html
- [oss-security] 20210810 [OSSA-2021-003] Keystone: Account name and UUID oracles in account locking (CVE-2021-38155) mailing-list
- [debian-lts-announce] 20240121 [SECURITY] [DLA 3714-1] keystone security update mailing-list