CVE-2018-16886

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.

Affected packages (4)

• Debian/etcdfrom 0, < 3.2.26+dfsg-1
• Go/go.etcd.io/etcdfrom 0, < 0.5.0-alpha.5.0.20190108173120-83c051b701d3
• Go/go.etcd.io/etcdfrom 0, < 0.5.0-alpha.5.0.20190108173120-83c051b701d3
• Go/go.etcd.io/etcd/v3>= 3.2.0, < 3.2.26

CVSS scores

References (15)

• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2018-16886
• ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2018-16886
• PATCHhttps://github.com/etcd-io/etcd
• WEBhttps://access.redhat.com/errata/RHSA-2019:0237
• WEBhttps://access.redhat.com/errata/RHSA-2019:1352
• WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
• WEBhttps://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication
• WEBhttps://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication
• WEBhttps://github.com/etcd-io/etcd/commit/0191509637546621d6f2e18e074e955ab8ef374d
• WEBhttps://github.com/etcd-io/etcd/commit/bf9d0d8291dc71ecbfb2690612954e1a298154b2
• WEBhttps://github.com/etcd-io/etcd/pull/10366
• WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4
• WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS
• WEBhttps://pkg.go.dev/vuln/GO-2021-0077
• WEBhttp://www.securityfocus.com/bid/106540