CVE-2019-20444

Aliases:GHSA-cqqj-4p63-rrmm
Advisory lineage Upstream: 0 Downstream: 16
Modified
Published: 29 Jan 2020, 20:33
Last modified:01 Jul 2025, 18:01

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
v3.1 (nvd)
EPSS Score
18.32% MEDIUM
18% probability +7.22%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

29 Jan 2020, 20:33
Published
Vulnerability first disclosed
01 Jul 2025, 18:01
Last Modified
Vulnerability information updated

Description

HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an "invalid fold."

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  • v2.0•MEDIUM•Score: 6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 18.32%• Percentile: 95%

Techniques & Countermeasures

  • CWE-444•Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

    The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Affected Systems

  • canonical•ubuntu_linux

    18.04

  • debian•debian_linux

    8.0 | 9.0 | 10.0

  • fedoraproject•fedora

    33

  • io.netty•netty

    all

  • io.netty•netty-codec-http

    < 4.1.44

  • org.jboss.netty•netty

    all

  • netty•netty

    < 4.1.44

  • redhat•jboss_amq_clients

    2

  • redhat•jboss_enterprise_application_platform

    7.2 | 7.3

References (123)