CVE-2023-30845

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Summary

CVECVE-2023-30845
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-04-26 21:15:00 UTC
Updated2023-05-09 16:08:00 UTC
DescriptionESPv2 is a service proxy that provides API management capabilities using Google Service Infrastructure. ESPv2 2.20.0 through 2.42.0 contains an authentication bypass vulnerability. API clients can craft a malicious `X-HTTP-Method-Override` header value to bypass JWT authentication in specific cases. ESPv2 allows malicious requests to bypass authentication if both the conditions are true: The requested HTTP method is **not** in the API service definition (OpenAPI spec or gRPC `google.api.http` proto annotations, and the specified `X-HTTP-Method-Override` is a valid HTTP method in the API service definition. ESPv2 will forward the request to your backend without checking the JWT. Attackers can craft requests with a malicious `X-HTTP-Method-Override` value that allows them to bypass specifying JWTs. Restricting API access with API keys works as intended and is not affected by this vulnerability. Upgrade deployments to release v2.43.0 or higher to receive a patch. This release ensures that JWT authentication occurs, even when the caller specifies `x-http-method-override`. `x-http-method-override` is still supported by v2.43.0+. API clients can continue sending this header to ESPv2.

Risk And Classification

Problem Types: CWE-287

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Google Espv2 All All All All

References

ReferenceSourceLinkTags
Add back in HTTP method override in service control filter (#802) · GoogleCloudPlatform/esp-v2@e98061e · GitHub MISC github.com
move x-http-method-override to beginning of filter chain (#801) · GoogleCloudPlatform/esp-v2@e956701 · GitHub MISC github.com
Changelog for v2.43.0 · GoogleCloudPlatform/esp-v2@0bcdfc0 · GitHub MISC github.com
JWT authentication bypass via `X-HTTP-Method-Override` header · Advisory · GoogleCloudPlatform/esp-v2 · GitHub MISC github.com
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