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Red Hat: CVE-2018-16886: Moderate: etcd security, bug fix, and enhancement update (RHSA-2019:1352)

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Red Hat: CVE-2018-16886: Moderate: etcd security, bug fix, and enhancement update (RHSA-2019:1352)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
01/14/2019
Created
03/19/2019
Added
02/01/2019
Modified
03/03/2021

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.

Solution(s)

  • redhat-upgrade-etcd
  • redhat-upgrade-etcd-debuginfo

References

  • 106540
  • CVE-2018-16886
  • RHSA-2019:0237
  • RHSA-2019:1352

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