Improper Authentication in etcd
Discription

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.Read More

References

https://nvd.nist.gov/vuln/detail/CVE-2018-16886https://github.com/etcd-io/etcd/pull/10366https://github.com/etcd-io/etcd/commit/0191509637546621d6f2e18e074e955ab8ef374dhttps://github.com/etcd-io/etcd/commit/bf9d0d8291dc71ecbfb2690612954e1a298154b2https://access.redhat.com/errata/RHSA-2019:0237https://access.redhat.com/errata/RHSA-2019:1352https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authenticationhttps://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authenticationhttps://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/http://www.securityfocus.com/bid/106540

6.8 Medium

CVSS2

  • Access Vector
  • Access Complexity
  • Authentication
  • Confidentiality Impact
  • Integrity Impact
  • Availability Impact
  • Network
  • Medium
  • None
  • Partial
  • Partial
  • Partial

AV:N/AC:M/Au:N/C:P/I:P/A:P

8.1 High

CVSS3

  • Attack Vector
  • Attack Complexity
  • Privileges Required
  • User Interaction
  • Scope
  • Confidentiality Impact
  • Integrity Impact
  • Availability Impact
  • Network
  • High
  • None
  • None
  • Unchanged
  • High
  • High
  • High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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