CVE-2018-16886

CVSS 6.8 MEDIUMEPSS 4.0%CWE-287

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.8EPSS 4.0%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

14 Jan 2019Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

The etcd Project · etcd:

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References

https://access.redhat.com/errata/RHSA-2019:0237 https://access.redhat.com/errata/RHSA-2019:1352 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886 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://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/http://www.securityfocus.com/bid/106540