Impact
Several endpoints including /devicemodels, /rules, /ruleendpoints, /offlinemigration in the Cloud Admissioncontroller may be susceptible to a DoS attack if an HTTP request containing a very large Body is sent to it.
Only an authenticated user can cause this issue. It will be affected when users deploy a Cloud Admissioncontroller. The consequence of the exhaustion is that the Cloud Admissioncontroller will be in denial of service.
Patches
This bug has been fixed in Kubeedge 1.11.1, 1.10.2, 1.9.4. Users should update to these versions to resolve the issue.
Workarounds
At the time of writing, no workaround exists.
References
NA
Credits
Thanks David Korczynski and Adam Korczynski of ADA Logics for responsibly disclosing this issue in accordance with the kubeedge security policy during a security audit sponsored by CNCF and facilitated by OSTIF.
For more information
If you have any questions or comments about this advisory:
- Open an issue in KubeEdge repo
- To make a vulnerability report, email your vulnerability to the private cncf-kubeedge-security@lists.cncf.io list with the security details and the details expected for KubeEdge bug reports.