CVE-2021-32781

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Summary

CVECVE-2021-32781
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-24 21:15:00 UTC
Updated2022-07-02 18:31:00 UTC
DescriptionEnvoy 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.

Risk And Classification

Problem Types: CWE-120

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Envoyproxy Envoy All All All All
Application Envoyproxy Envoy 1.19.0 All All All

References

ReferenceSourceLinkTags
Version history — envoy tag-v1.19.0 documentation MISC www.envoyproxy.io
Continued processing of requests after locally generated response · Advisory · envoyproxy/envoy · GitHub CONFIRM github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159555 Oracle Enterprise Linux Security Update for olcne (ELSA-2021-9525)
  • 159556 Oracle Enterprise Linux Security Update for olcne (ELSA-2021-9526)
  • 159558 Oracle Enterprise Linux Security Update for olcne istio istio kubernetes (ELSA-2021-9546)
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