Eventlet is a concurrent networking library for Python. A websocket peer may exhaust memory on Eventlet side by sending very large websocket frames. Malicious peer may exhaust memory on Eventlet side by sending highly compressed data frame. A patch in version 0.31.0 restricts websocket frame to reasonable limits. As a workaround, restricting memory usage via OS limits would help against overall machine exhaustion, but there is no workaround to protect Eventlet process. Reference: https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2
Created python-eventlet tracking bugs for this issue: Affects: epel-all [bug 1958409] Affects: fedora-all [bug 1958408] Affects: openstack-rdo [bug 1958410]
Upstream fix: https://github.com/eventlet/eventlet/commit/1412f5e4125b4313f815778a1acb4d3336efcd07
Statement: In OpenShift Container Platform 4, the python-eventlet package is only used in Ironic container images, used for Baremetal provisioning, and Kuryr SDN container images, used for deployments on OpenStack. In Red Hat Gluster Storage 3, python-eventlet package was primarily shipped as a dependency of openstack-swift. However, Openstack Swift is no longer supported with the recent release of Red Hat Gluster Storage 3.5.
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.8 Via RHSA-2021:2437 https://access.redhat.com/errata/RHSA-2021:2437
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-21419
This issue has been addressed in the following products: Red Hat OpenStack Platform 16.1 Via RHSA-2021:5071 https://access.redhat.com/errata/RHSA-2021:5071