CVE-2021-43825

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Summary

CVECVE-2021-43825
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-02-22 23:15:00 UTC
Updated2022-03-02 18:13:00 UTC
DescriptionEnvoy is an open source edge and service proxy, designed for cloud-native applications. Sending a locally generated response must stop further processing of request or response data. Envoy tracks the amount of buffered request and response data and aborts the request if the amount of buffered data is over the limit by sending 413 or 500 responses. However when the buffer overflows while response is processed by the filter chain the operation may not be aborted correctly and result in accessing a freed memory block. If this happens Envoy will crash resulting in a denial of service.

Risk And Classification

Problem Types: CWE-416

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Envoyproxy Envoy All All All All

References

ReferenceSourceLinkTags
Use-after-free when response filters increase response data, and increased data exceeds downstream buffer limits. · Advisory · envoyproxy/envoy · GitHub CONFIRM github.com
CVE-2021-43825 · envoyproxy/envoy@148de95 · GitHub MISC github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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