Improper Authentication Affecting etcd package, versions <3.2.26+dfsg-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-ETCD-282520
- published 14 Jan 2019
- disclosed 14 Jan 2019
Introduced: 14 Jan 2019
CVE-2018-16886 Open this link in a new tabHow to fix?
Upgrade Debian:unstable etcd to version 3.2.26+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream etcd package and not the etcd package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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
- https://security-tracker.debian.org/tracker/CVE-2018-16886
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
- https://access.redhat.com/errata/RHSA-2019:0237
- https://access.redhat.com/errata/RHSA-2019:1352
- http://www.securityfocus.com/bid/106540
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-16886
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/