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Oracle Linux: (CVE-2021-32778) (Multiple Advisories): olcne security update

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Oracle Linux: (CVE-2021-32778) (Multiple Advisories): olcne security update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
08/24/2021
Created
11/11/2021
Added
11/09/2021
Modified
11/10/2021

Description

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions envoy’s procedure for resetting a HTTP/2 stream has O(N^2) complexity, leading to high CPU utilization when a large number of streams are reset. Deployments are susceptible to Denial of Service when Envoy is configured with high limit on H/2 concurrent streams. An attacker wishing to exploit this vulnerability would require a client opening and closing a large number of H/2 streams. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to reduce time complexity of resetting HTTP/2 streams. As a workaround users may limit the number of simultaneous HTTP/2 dreams for upstream and downstream peers to a low number, i.e. 100.

Solution(s)

  • oracle-linux-upgrade-istio
  • oracle-linux-upgrade-istio-istioctl
  • oracle-linux-upgrade-istio-pilot-agent
  • oracle-linux-upgrade-istio-pilot-discovery
  • 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-grafana-chart
  • oracle-linux-upgrade-olcne-istio-chart
  • oracle-linux-upgrade-olcne-nginx
  • oracle-linux-upgrade-olcne-olm-chart
  • oracle-linux-upgrade-olcne-prometheus-chart
  • oracle-linux-upgrade-olcne-utils
  • oracle-linux-upgrade-olcnectl

References

  • ELSA-2021-9525
  • CVE-2021-32778

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