CVE-2018-16886

HIGH

etcd 3.2.0-3.2.25 and 3.3.0-3.3.10 - Improper Authentication via TLS Certificate Common Name

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/106540
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:0237
Issue Tracking, Patch, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:1352

Scores

CVSS v3 8.1
EPSS 0.0049
EPSS Percentile 65.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-287
Status published
Products (7)
etcd/etcd 3.2.0 - 3.2.26
etcd/v3 3.2.0 - 3.2.26Go
fedoraproject/fedora 30
go.etcd.io/etcd 0 - 0.5.0-alpha.5.0.20190108173120-83c051b701d3Go
redhat/enterprise_linux_desktop 7.0
redhat/enterprise_linux_server 7.0
redhat/enterprise_linux_workstation 7.0
Published Jan 14, 2019
Tracked Since Feb 18, 2026