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Oracle Linux: (CVE-2020-15104) ELSA-2020-5765: Unbreakable Enterprise kernel-container kata-image kata-runtime kata kubernetes kubernetes istio olcne security update

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Oracle Linux: (CVE-2020-15104) ELSA-2020-5765: Unbreakable Enterprise kernel-container kata-image kata-runtime kata kubernetes kubernetes istio olcne security update

Severity
6
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:N)
Published
07/14/2020
Created
07/28/2020
Added
07/23/2020
Modified
07/23/2020

Description

In Envoy before versions 1.12.6, 1.13.4, 1.14.4, and 1.15.0 when validating TLS certificates, Envoy would incorrectly allow a wildcard DNS Subject Alternative Name apply to multiple subdomains. For example, with a SAN of *.example.com, Envoy would incorrectly allow nested.subdomain.example.com, when it should only allow subdomain.example.com. This defect applies to both validating a client TLS certificate in mTLS, and validating a server TLS certificate for upstream connections. This vulnerability is only applicable to situations where an untrusted entity can obtain a signed wildcard TLS certificate for a domain of which you only intend to trust a subdomain of. For example, if you intend to trust api.mysubdomain.example.com, and an untrusted actor can obtain a signed TLS certificate for *.example.com or *.com. Configurations are vulnerable if they use verify_subject_alt_name in any Envoy version, or if they use match_subject_alt_names in version 1.14 or later. This issue has been fixed in Envoy versions 1.12.6, 1.13.4, 1.14.4, 1.15.0.

Solution(s)

  • oracle-linux-upgrade-istio
  • oracle-linux-upgrade-istio-citadel
  • oracle-linux-upgrade-istio-galley
  • oracle-linux-upgrade-istio-istioctl
  • oracle-linux-upgrade-istio-mixc
  • oracle-linux-upgrade-istio-mixs
  • oracle-linux-upgrade-istio-node-agent
  • oracle-linux-upgrade-istio-pilot-agent
  • oracle-linux-upgrade-istio-pilot-discovery
  • oracle-linux-upgrade-istio-proxy-init
  • oracle-linux-upgrade-istio-sidecar-injector
  • oracle-linux-upgrade-kata
  • oracle-linux-upgrade-kata-image
  • oracle-linux-upgrade-kata-runtime
  • oracle-linux-upgrade-kernel-uek-container
  • oracle-linux-upgrade-kubeadm
  • oracle-linux-upgrade-kubectl
  • oracle-linux-upgrade-kubelet
  • oracle-linux-upgrade-kubernetes
  • oracle-linux-upgrade-olcne
  • oracle-linux-upgrade-olcne-agent
  • oracle-linux-upgrade-olcne-api-server
  • oracle-linux-upgrade-olcne-istio-chart
  • oracle-linux-upgrade-olcne-nginx
  • oracle-linux-upgrade-olcne-prometheus-chart
  • oracle-linux-upgrade-olcne-utils
  • oracle-linux-upgrade-olcnectl

References

  • ELSA-2020-5765
  • CVE-2020-15104

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