CVE-2021-43797 Information

Description

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to \sanitize\ header names before it forward these to another remote system when used as proxy. This remote system can’t see the invalid usage anymore and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Reference

https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq https://github.com/netty/netty/commit/07aa6b5938a8b6ed7a6586e066400e2643897323 https://security.netapp.com/advisory/ntap-20220107-0003/ https://www.oracle.com/security-alerts/cpuapr2022.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5