Improper Authentication in etcd - CVE-2018-16886
Published: June 30, 2022 / Updated: July 5, 2022
Vulnerability identifier: #VU64828
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-16886
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: CoreOS
Affected software:
etcd
etcd
Detailed vulnerability description
The vulnerability allows a remote user to bypass authentication process.
The vulnerability exists due to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. A remote user can authenticate as user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.
How to mitigate CVE-2018-16886
Install updates from vendor's website.
Sources
- 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
- https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication