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CVE-2021-21409

5.9 medium SSVC exploitation: none Modified
NVD · CVE.org

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

Fix

Patch, vendor advisory and mitigation references on NVD 10

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 5.9 · netty, debian, netappNVD modified 2026-10-08 22:17

Affected (CPE criteria) 26

  • cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:netapp:oncommand_api_services:-:*:*:*:*:*:*:*
  • cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_corporate_lending_process_management:14.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_credit_facilities_process_management:14.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_trade_finance_process_management:14.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_trade_finance_process_management:14.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:banking_trade_finance_process_management:14.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:coherence:12.2.1.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:coherence:14.1.1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_brm_-_elastic_charging_engine:12.0.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_cloud_native_core_console:1.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_design_studio:7.4.2.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:communications_messaging_server:8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:helidon:1.4.10:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:helidon:2.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:nosql_database:*:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:*
  • cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:*

References 118