CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2018-16886
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.
Severity
- EPSS
- 4.1% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- etcd:etcd
- fedoraproject:fedora
- redhat:enterprise_linux_desktop
- redhat:enterprise_linux_server
- redhat:enterprise_linux_workstation
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-h6xx-pmxh-3wgp | Go | go.etcd.io/etcd/v3 | >=3.2.0 <3.2.26 | 3.2.26 |
| GHSA-h6xx-pmxh-3wgp | Go | go.etcd.io/etcd/v3 | >=3.3.0 <3.3.11 | 3.3.11 |
| GHSA-h6xx-pmxh-3wgp | Go | go.etcd.io/etcd | <0.5.0-alpha.5.0.20190108173120-83c051b701d3 | 0.5.0-alpha.5.0.20190108173120-83c051b701d3 |
| GO-2021-0077 | Go | go.etcd.io/etcd | <0.5.0-alpha.5.0.20190108173120-83c051b701d3 | 0.5.0-alpha.5.0.20190108173120-83c051b701d3 |
References
- http://www.securityfocus.com/bid/106540
- https://access.redhat.com/errata/RHSA-2019:0237
- https://access.redhat.com/errata/RHSA-2019:1352
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
- https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication