CVE-2018-16886

Severity CVSS v4.0:

Pending analysis

Type:

CWE-287 Authentication Issues

Publication date:

14/01/2019

Last modified:

07/11/2023

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.10

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:M/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

6.80

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:etcd:etcd::::::::	3.2.0 (including)	3.2.26 (excluding)
cpe:2.3:a:etcd:etcd::::::::	3.3.0 (including)	3.3.11 (excluding)
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:::::::*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:::::::*
cpe:2.3:o:fedoraproject:fedora:30:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2018-16886

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools