Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Network
0

CVE-2021-43797

Disclosure Date: December 09, 2021 •
CVE-2021-43797 CVSS v3 Base Score: 6.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
3.6
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
High
Availability (A):
None

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
netty <= 4.1.7.0.Final
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • netapp,
  • netty,
  • oracle,
  • quarkus

Products

  • banking deposits and lines of credit servicing 2.7,
  • banking party management 2.7.0,
  • banking platform 2.6.2,
  • coherence 12.2.1.4.0,
  • coherence 14.1.1.0.0,
  • communications cloud native core binding support function 1.11.0,
  • communications cloud native core network slice selection function 1.8.0,
  • communications cloud native core policy 1.15.0,
  • communications cloud native core security edge protection proxy 1.7.0,
  • communications cloud native core unified data repository 1.15.0,
  • communications design studio 7.4.2,
  • communications instant messaging server 8.1,
  • debian linux 10.0,
  • debian linux 11.0,
  • helidon 1.4.10,
  • helidon 2.4.0,
  • netty,
  • oncommand workflow automation -,
  • peoplesoft enterprise peopletools 8.58,
  • peoplesoft enterprise peopletools 8.59,
  • quarkus,
  • snapcenter -
Technical Analysis