SB2020012928 - Multiple vulnerabilities in Netty

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Main Vulnerability Database SB2020012928

SB2020012928 - Multiple vulnerabilities in Netty

Published: January 29, 2020 Updated: February 11, 2025

Security Bulletin ID SB2020012928
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) HTTP response splitting (CVE-ID: CVE-2019-20445)

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.


2) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2019-20444)

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

The vulnerability exists due to incorrect processing of HTTP headers without the colon within the HttpObjectDecoder.java file in Netty. A remote attacker can send a specially crafted HTTP request to the application and perform HTTP request smuggling attack.


Remediation

Install update from vendor's website.

References