Buffer Overflow Affecting kubeadm package, versions <0:1.20.11-4.el7
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Test your applications- Snyk ID SNYK-ORACLE7-KUBEADM-2599696
- published 10 Apr 2022
- disclosed 24 Aug 2021
Introduced: 24 Aug 2021
CVE-2021-32781 Open this link in a new tabHow to fix?
Upgrade Oracle:7 kubeadm to version 0:1.20.11-4.el7 or higher.
This issue was patched in ELSA-2021-9526.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kubeadm package and not the kubeadm package as distributed by Oracle.
See How to fix? for Oracle:7 relevant fixed versions and status.
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions after Envoy sends a locally generated response it must stop further processing of request or response data. However when local response is generated due the internal buffer overflow while request or response is processed by the filter chain the operation may not be stopped completely and result in accessing a freed memory block. A specifically constructed request delivered by an untrusted downstream or upstream peer in the presence of extensions that modify and increase the size of request or response bodies resulting in a Denial of Service when using extensions that modify and increase the size of request or response bodies, such as decompressor filter. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to address incomplete termination of request processing after locally generated response. As a workaround disable Envoy's decompressor, json-transcoder or grpc-web extensions or proprietary extensions that modify and increase the size of request or response bodies, if feasible.
References
- https://linux.oracle.com/cve/CVE-2021-32781.html
- https://linux.oracle.com/errata/ELSA-2021-9525.html
- https://linux.oracle.com/errata/ELSA-2021-9526.html
- https://linux.oracle.com/errata/ELSA-2021-9546.html
- https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-5vhv-gp9v-42qv