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Vulnerability Details : CVE-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.
Publish Date : 2019-01-14 Last Update Date : 2019-06-04
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 287

- Products Affected By CVE-2018-16886

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 30 Version Details Vulnerabilities
2 OS Redhat Enterprise Linux Desktop 7.0 Version Details Vulnerabilities
3 OS Redhat Enterprise Linux Server 7.0 Version Details Vulnerabilities
4 OS Redhat Enterprise Linux Workstation 7.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 1
Redhat Enterprise Linux Desktop 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Workstation 1

- References For CVE-2018-16886

http://www.securityfocus.com/bid/106540
BID 106540 etcd CVE-2018-16886 Authentication Bypass Vulnerability Release Date:2019-01-11
https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication
https://lists.fedoraproject.org/archives/list/[email protected]/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/
FEDORA FEDORA-2019-833466697f
https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication
https://lists.fedoraproject.org/archives/list/[email protected]/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
FEDORA FEDORA-2019-219b0b0b6a
https://access.redhat.com/errata/RHSA-2019:1352
REDHAT RHSA-2019:1352
https://access.redhat.com/errata/RHSA-2019:0237
REDHAT RHSA-2019:0237
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886 CONFIRM

- Metasploit Modules Related To CVE-2018-16886

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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