Inconsistent interpretation of HTTP requests in llhttp - CVE-2021-22960

Vulnerability identifier: #VU59234

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-22960

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
llhttp
Arch Linux
Amazon Linux AMI
Gentoo Linux
SUSE CaaS Platform
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
SUSE Linux Enterprise Module for Web Scripting
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
openSUSE Leap
Fedora
QRadar Pulse App
Red Hat Software Collections
Voice Gateway
IBM Netcool Agile Service Manager
IBM Cloud Transformation Advisor
IBM Security Verify Governance
IBM InfoSphere Information Server for Cloud
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
nodejs (Debian package)
rh-nodejs12-nodejs (Red Hat package)
rh-nodejs14-nodejs-nodemon (Red Hat package)
nodejs-nodemon
npm
nodejs10-devel
nodejs10-docs
npm10
nodejs10-debugsource
nodejs10-debuginfo
nodejs10
nodejs-lts-erbium
nodejs12-docs
npm12
nodejs12
nodejs12-debuginfo
nodejs12-debugsource
nodejs12-devel
nodejs
nodejs-lts-fermium
nodejs14
nodejs14-debuginfo
nodejs14-debugsource
nodejs14-devel
npm14
nodejs14-docs
rh-nodejs14-nodejs (Red Hat package)
nodejs-devel
nodejs-full-i18n
nodejs-docs
nodejs-packaging
Event Streams
IBM Cognos Controller
IBM InfoSphere Information Server

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests, where the application ignores chunk extensions when parsing the body of chunked requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Install updates from vendor's website.

• https://hackerone.com/reports/1238099