Impact
A large response received by the viaduct WSClient can cause a DoS from memory exhaustion. The entire body of the response is being read into memory which could allow an attacker to send a request that returns a response with a large body.
The consequence of the exhaustion is that the process which invokes a WSClient will be in a denial of service. It will be affected If users which are authenticated to the edge side and connect from the edge side to cloudhub through WebSocket protocol.
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.