CVE-2021-31166

CVE-2021-31166 Why I recently wrote an exploit for CVE-2021-31166, it exploit CVE-2021-31166 and CVE-2021-31166. A pentester should use https://github.com/mauricelambert/CVE-2021-31166, but in SOC teams we need to know the specific vulneraility to fix it properly, which is why i wrote this exploi...

cve-2022-21907

CVE-2022-21907 Aplicación Golang por 1vere$k CVE-2022-21907 - Double Free en el controlador http.sys. Resumen Esta es una aplicación Golang de subprocesos múltiples que permite hacer solicitudes a algunos objetivos simultáneamente. No es muy productiva con las solicitudes POST, pero proporciona...

CVE-2022-21907-http.sys

CVE-2022-21907 - Double Free in http.sys driver CVE-2022-21907 - Double Free in http.sys driver Summary An unauthenticated attacker can send an HTTP request with an "Accept-Encoding" HTTP request header triggering a double free in the unknown coding-list inside the HTTP Protocol Stack http.sys to...

Webmin < 1.920 - Authenticated Remote Code Execution

rpc.cgi in Webmin through 1.920 allows authenticated Remote Code Execution via a crafted object name because unserialisevariable makes an eval call. NOTE: the WebminServersIndex documentation states "RPC can be used to run any command or modify any file on a server, which is why access to it must...

CVE-2021-31166

CVE-2021-31166 Detection of attempts to exploit CVE-2021-31166 HTTP Protocol Stack vulnerability Suricata rule Zeek Package References https://corelight.blog/2021/05/27/detecting-cve-2021-31166-http-vulnerability/ https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31166...

cve-2022-21907-http.sys

cve-2022-21907-http.sys by 1vere$k CVE-2022-21907 - Doble liberación en el controlador http.sys. Resumen Un atacante no autenticado puede enviar una solicitud HTTP con una cabecera de solicitud HTTP "Accept-Encoding" que desencadena una doble liberación en la lista de codificaciones desconocida...

CVE-2021-31166-Exploit

CVE-2021-31166-Exploit Exploit for MS Http Protocol Stack RCE vulnerability CVE-2021-31166 A specially crafted Http request targetting a vulnerable windows version will result into DOS attack. And the server will be rebooted with blue screen error. Http.sys is a windows kernel driver responsible...

Debian dla-4706 : ruby-rack - security update

The remote Debian 11 / 12 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4706 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4706-1 [email protected]...

Uncontrolled Resource Consumption (Denial Of Service)

io.netty, netty-codec-http is vulnerable to Uncontrolled Resource Consumption Denial of Service. The vulnerability is due to the HttpContentEncoder maintaining an unbounded acceptEncodingQueue that stores attacker-controlled data without any size limit, which allows an attacker to exploit HTTP/1....

Netty: [HttpContentEncoder] Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

Impact HttpContentEncoder the superclass of the production handler HttpContentCompressor maintains a per-channel ArrayDeque named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained...

MGASA-2026-0226 Updated ruby-rack packages fix security vulnerabilities

CVE-2026-26961 Greedy multipart boundary parsing can cause parser differentials and WAF bypass. Forwarded header semicolon injection enables Host and Scheme spoofing. CVE-2026-34230 Quadratic complexity in Rack::Utils.selectbestencoding via wildcard Accept-Encoding header. CVE-2026-34763 Root...

USN-8182-1: Rack vulnerabilities

Andrew Lacambra discovered that Rack did not properly parse certain regular expressions. An attacker could possibly use this issue to bypass network security filters. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. CVE-2026-26961 William T. Nelson...

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : Rack vulnerabilities (USN-8182-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8182-1 advisory. Andrew Lacambra discovered that Rack did not properly parse certain regular...

Linux Distros Unpatched Vulnerability : CVE-2026-34230

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.selectbestencoding processes Accept-Encoding values with...

SUSE CVE-2026-34230

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a respon...

CVE-2026-34230

A flaw was found in Rack. An unauthenticated attacker can exploit a vulnerability in the Rack::Utils.selectbestencoding method by sending a specially crafted Accept-Encoding header with numerous wildcard entries. This leads to quadratic time complexity during processing, causing disproportionate...

Rack has quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header

Summary Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a response encoding, an unauthenticated attacker can send a single request with a crafted...

EUVD-2026-18378

Rack has quadratic complexity in Rack::Utils.selectbestencoding via wildcard Accept-Encoding header...

GHSA-V569-HP3G-36WR Rack has quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header

Summary Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a response encoding, an unauthenticated attacker can send a single request with a crafted...

DEBIAN-CVE-2026-34230

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a respon...