http2smugl: HTTP2 request smuggling security testing tool

HTTP/2 become the standard defacto for the modern web and causes new application security risks. The HTTP2 request smuggling is one of a few HTTP/2 vulnerabilities with the high severity that raised last year. In this post, we will describe it in detail and suggest an open-source tool http2smugl...

CVE-2021-28165

When using SSL/TLS with Jetty, either with HTTP/1.1, HTTP/2, or WebSocket, the server may receive an invalid large greater than 17408 TLS frame that is incorrectly handled, causing high CPU resources utilization. The highest threat from this vulnerability is to service availability...

CVE-2021-21409

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...

CVE-2021-21409

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...

Design/Logic Flaw

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...

CVE-2021-21409

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...

CVE-2021-21409

The CVE concerns Netty’s HTTP/2 codec (io.netty:netty-codec-http2) where, before version 4.1.61.Final, a Content-Length check can be bypassed when a single Http2HeaderFrame with endStream set to true is used. This enables HTTP request smuggling if the request is proxied and translated to HTTP/1.1...

Who has the fastest F1 website in 2021? Part 4

This is part 4 in a multi-part series looking at the loading performance of F1 websites. Not interested in F1? It shouldn't matter. This is just a performance review of 10 recently-built/updated sites that have broadly the same goal, but are built by different teams, and have different performanc...

"Http/1.1 Internal Server Error 43531" when accessing Citrix Gateway after upgrading to version 13.0

Users will get the error "Http/1.1 Internal Server Error 43531" The ns.log will give error as below: Dec 23 14:52:26 , aaainfo flags 11 flags2 0, new webview 0, sess flags2 0, flags3 0 flags4 400 ssoDomain , ssoUsername: , ssoUsername2: " Dec 23 14:52:26 XXX.XXX.X.XXX 12/23/2020:19:52:26 GMT...

HTTP Request Smuggling

netty-codec-http2 is vulnerable to HTTP request smuggling. The Content-Length header is not validated and allows an attacker to smuggle requests as requests are downgraded from HTTP/2 to HTTP/1.1...

CVE-2021-21295

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a...

CVE-2021-21295

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a...

Possible request smuggling in HTTP/2 due missing validation

Impact If a Content-Length header is present in the original HTTP/2 request, the field is not validated by Http2MultiplexHandler as it is propagated up. This is fine as long as the request is not proxied through as HTTP/1.1. If the request comes in as an HTTP/2 stream, gets converted into the...

CVE-2021-21295 Possible request smuggling in HTTP/2 due missing validation

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a...

CVE-2021-21295

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a...

CVE-2021-21295: Inconsistent Interpretation of HTTP Requests

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 4.1.60.Final there is a vulnerability that enables request smuggling. If a...

CentOS 8 : go-toolset:rhel8 (CESA-2020:0329)

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:0329 advisory. - golang: HTTP/1.1 headers with a space before the colon leads to filter bypass or request smuggling CVE-2019-16276 - golang: invalid public key causes...

CVE-2020-27782

A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability. Mitigatio...

CVE-2020-26281

async-h1 is an asynchronous HTTP/1.1 parser for Rust crates.io. There is a request smuggling vulnerability in async-h1 before version 2.3.0. This vulnerability affects any webserver that uses async-h1 behind a reverse proxy, including all such Tide applications. If the server does not read the bo...

CVE-2020-26281

async-h1 is an asynchronous HTTP/1.1 parser for Rust crates.io. There is a request smuggling vulnerability in async-h1 before version 2.3.0. This vulnerability affects any webserver that uses async-h1 behind a reverse proxy, including all such Tide applications. If the server does not read the bo...