Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and clients. In versions 4.1.124.Final, and 4.2.0.Alpha3 through 4.2.4.Final, Netty incorrectly accepts standalone newline characters (LF) as a chunk-size line terminator, regardless of a preceding carriage return (CR), instead of requiring CRLF per HTTP/1.1 standards. When combined with reverse proxies that parse LF differently (treating it as part of the chunk extension), attackers can craft requests that the proxy sees as one request but Netty processes as two, enabling request smuggling attacks. This is fixed in versions 4.1.125.Final and 4.2.5.Final.
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 8.1.0 Via RHSA-2025:17299 https://access.redhat.com/errata/RHSA-2025:17299
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 Via RHSA-2025:17298 https://access.redhat.com/errata/RHSA-2025:17298
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 8.0.9 Via RHSA-2025:17318 https://access.redhat.com/errata/RHSA-2025:17318
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9 Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8 Via RHSA-2025:17317 https://access.redhat.com/errata/RHSA-2025:17317
This issue has been addressed in the following products: Red Hat AMQ Broker 7.13.2 Via RHSA-2025:17567 https://access.redhat.com/errata/RHSA-2025:17567
This issue has been addressed in the following products: Red Hat build of Apache Camel 4.10.7 for Spring Boot 3.4.10 Via RHSA-2025:18028 https://access.redhat.com/errata/RHSA-2025:18028
This issue has been addressed in the following products: Red Hat Build of Apache Camel 4.10 for Quarkus 3.20 Via RHSA-2025:18076 https://access.redhat.com/errata/RHSA-2025:18076