Improper Authentication in etcd - CVE-2018-16886

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Main Vulnerability Database Vulnerabilities #VU64828

Improper Authentication in etcd - CVE-2018-16886

Published: June 30, 2022 / Updated: July 5, 2022


Vulnerability identifier: #VU64828
CSH Severity: Low
CVSS v4: 7.6 [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]
CVE-ID: CVE-2018-16886
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

etcd
IBM Cloud Pak for Security
QRadar Suite
IBM Edge Application Manager
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM System z (Structure A)
openSUSE Leap
Fedora
etcd (Red Hat package)
etcd
etcdctl

How to mitigate CVE-2018-16886

Install updates from vendor's website.

etcd - addressed in versions 3.2.26, 3.3.11
QRadar Suite - update to 1.10.19.0
etcd (Red Hat package) - addressed in versions 3.2.26-1.el7, 3.3.11-2.el7
etcd - addressed in versions 3.3.12-1.20190314gite1ca3b4.fc29, 3.3.12-1.20190314gite1ca3b4.fc30, 3.3.12-2.20190413gitf29b1ad.fc29, 3.3.12-3.20190413gitf29b1ad.fc29, 3.3.12-4.20190413gitf29b1ad.fc29
etcdctl - update to 3.5.12-150000.7.6.1
etcd - update to 3.5.12-150000.7.6.1

External References

Related Security Bulletins