CVE - CVE-2021-41130

CVE-ID
CVE-2021-41130	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Extensible Service Proxy, a.k.a. ESP is a proxy which enables API management capabilities for JSON/REST or gRPC API services. ESPv1 can be configured to authenticate a JWT token. Its verified JWT claim is passed to the application by HTTP header "X-Endpoint-API-UserInfo", the application can use it to do authorization. But if there are two "X-Endpoint-API-UserInfo" headers from the client, ESPv1 only replaces the first one, the 2nd one will be passed to the application. An attacker can send two "X-Endpoint-API-UserInfo" headers, the second one with a fake JWT claim. Application may use the fake JWT claim to do the authorization. This impacts following ESPv1 usages: 1) Users have configured ESPv1 to do JWT authentication with Google ID Token as described in the referenced google endpoint document. 2) Users backend application is using the info in the "X-Endpoint-API-UserInfo" header to do the authorization. It has been fixed by v1.58.0. You need to patch it in the following ways: * If your docker image is using tag ":1", needs to re-start the container to pick up the new version. The tag ":1" will automatically point to the latest version. * If your docker image tag pings to a specific minor version, e.g. ":1.57". You need to update it to ":1.58" and re-start the container. There are no workaround for this issue.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/cloudendpoints/esp/security/advisories/GHSA-43wx-8qmj-9r9q URL:https://github.com/cloudendpoints/esp/security/advisories/GHSA-43wx-8qmj-9r9q MISC:https://cloud.google.com/endpoints/docs/openapi/authenticating-users-google-id URL:https://cloud.google.com/endpoints/docs/openapi/authenticating-users-google-id MISC:https://github.com/cloudendpoints/esp/commit/e310c4f91d229a072507f80c73811489b4cdff27 URL:https://github.com/cloudendpoints/esp/commit/e310c4f91d229a072507f80c73811489b4cdff27 MISC:https://github.com/cloudendpoints/esp/releases/tag/v1.58.0 URL:https://github.com/cloudendpoints/esp/releases/tag/v1.58.0
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20210915	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210915)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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