#VU25598 HTTP response splitting in Netty - CVE-2019-20445

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Main Vulnerability Database Vulnerabilities #VU25598

#VU25598 HTTP response splitting in Netty - CVE-2019-20445

Published: February 26, 2020 / Updated: February 11, 2025


Vulnerability identifier: #VU25598
Vulnerability risk: Medium
CVSSv4.0: 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-2019-20445
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Netty
Software vendor:
Netty project

Description

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not corrector process CRLF character sequences within the HttpObjectDecoder.java in Netty, which allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.


Remediation

Install updates from vendor's website.

External links