CVE-2018-16886
Authentication bypass in go.etcd.io/etcd
8.1
HIGH
CVSS 3.1
EPSS 0.49%
Description
etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.
How to fix CVE-2018-16886
To remediate CVE-2018-16886, upgrade the affected package to a fixed version below.
- —upgrade to 3.2.26+dfsg-1 or later
- —upgrade to 0.5.0-alpha.5.0.20190108173120-83c051b701d3 or later
- —upgrade to 0.5.0-alpha.5.0.20190108173120-83c051b701d3 or later
- —upgrade to 3.2.26 or later
Is CVE-2018-16886 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 3.2.26+dfsg-1
- from 0, < 0.5.0-alpha.5.0.20190108173120-83c051b701d3
- from 0, < 0.5.0-alpha.5.0.20190108173120-83c051b701d3
- >= 3.2.0, < 3.2.26
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |