Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2019-20444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Published: Jan 29, 2020 | Modified: Jul 01, 2025
CVSS 3.x
9.1
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.x
6.4 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-20444
CWEhttps://cwe.mitre.org/data/definitions/444.html

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.

Weakness

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 Software

NameVendorStart VersionEnd Version
NettyNetty*4.1.44 (excluding)
AMQ Clients 2.y for RHEL 6RedHatqpid-proton-0:0.30.0-4.el6_10*
AMQ Clients 2.y for RHEL 7RedHatqpid-proton-0:0.30.0-2.el7*
AMQ Clients 2.y for RHEL 7RedHatrubygem-qpid_proton-0:0.30.0-1.el7*
AMQ Clients 2.y for RHEL 8RedHatnodejs-rhea-0:1.0.16-1.el8*
AMQ Clients 2.y for RHEL 8RedHatqpid-proton-0:0.30.0-3.el8*
AMQ Clients 2.y for RHEL 8RedHatrubygem-qpid_proton-0:0.30.0-1.el8*
EAP-CD 19 Tech PreviewRedHatnetty*
Red Hat AMQRedHatnetty*
Red Hat AMQ 7.4.3RedHatnetty*
Red Hat AMQ Online 1.3.3 GARedHatnetty*
Red Hat AMQ Streams 1RedHatnetty*
Red Hat Data Grid 7.3.6RedHatnetty*
Red Hat Decision Manager 7RedHatnetty*
Red Hat Fuse 7.7.0RedHatnetty*
Red Hat JBoss EAP 7.2RedHat*
Red Hat JBoss EAP 7.2RedHatnetty*
Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7RedHateap7-netty-0:4.1.45-1.Final_redhat_00001.1.ep7.el7*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-netty-0:4.1.45-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-activemq-artemis-0:2.9.0-2.redhat_00009.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-apache-commons-beanutils-0:1.9.4-1.redhat_00002.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-glassfish-el-0:3.0.1-4.b08_redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-glassfish-jaxb-0:2.3.3-4.b02_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-glassfish-jsf-0:2.3.5-7.SP3_redhat_00005.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-hal-console-0:3.0.20-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-hibernate-0:5.3.15-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-infinispan-0:9.3.8-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-ironjacamar-0:1.4.20-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-databind-0:2.9.10.2-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jaegertracing-jaeger-client-java-0:0.34.1-1.redhat_00002.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-ejb-client-0:4.0.28-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-remoting-0:5.0.17-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-server-migration-0:1.3.1-8.Final_redhat_00009.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-picketlink-bindings-0:2.5.5-23.SP12_redhat_00012.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-stax2-api-0:4.2.0-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-sun-istack-commons-0:3.0.10-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-thrift-0:0.13.0-1.redhat_00002.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-0:7.2.7-4.GA_redhat_00004.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-http-client-0:1.0.20-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-openssl-0:1.0.9-2.SP03_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-openssl-linux-x86_64-0:1.0.9-2.SP03_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-transaction-client-0:1.1.9-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-woodstox-core-0:6.0.3-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-xml-security-0:2.1.4-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-netty-0:4.1.45-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-activemq-artemis-0:2.9.0-2.redhat_00009.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-apache-commons-beanutils-0:1.9.4-1.redhat_00002.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-glassfish-el-0:3.0.1-4.b08_redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-glassfish-jaxb-0:2.3.3-4.b02_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-glassfish-jsf-0:2.3.5-7.SP3_redhat_00005.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-hal-console-0:3.0.20-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-hibernate-0:5.3.15-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-infinispan-0:9.3.8-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-ironjacamar-0:1.4.20-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-databind-0:2.9.10.2-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jaegertracing-jaeger-client-java-0:0.34.1-1.redhat_00002.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-ejb-client-0:4.0.28-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-remoting-0:5.0.17-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-server-migration-0:1.3.1-8.Final_redhat_00009.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-picketlink-bindings-0:2.5.5-23.SP12_redhat_00012.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-stax2-api-0:4.2.0-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-sun-istack-commons-0:3.0.10-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-thrift-0:0.13.0-1.redhat_00002.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-0:7.2.7-4.GA_redhat_00004.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-http-client-0:1.0.20-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-openssl-0:1.0.9-2.SP03_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-openssl-linux-x86_64-0:1.0.9-2.SP03_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-transaction-client-0:1.1.9-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-woodstox-core-0:6.0.3-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-xml-security-0:2.1.4-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-netty-0:4.1.45-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-activemq-artemis-0:2.9.0-2.redhat_00009.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-apache-commons-beanutils-0:1.9.4-1.redhat_00002.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-glassfish-el-0:3.0.1-4.b08_redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-glassfish-jaxb-0:2.3.3-4.b02_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-glassfish-jsf-0:2.3.5-7.SP3_redhat_00005.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-hal-console-0:3.0.20-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-hibernate-0:5.3.15-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-infinispan-0:9.3.8-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-ironjacamar-0:1.4.20-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-databind-0:2.9.10.2-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jaegertracing-jaeger-client-java-0:0.34.1-1.redhat_00002.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-ejb-client-0:4.0.28-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-remoting-0:5.0.17-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-server-migration-0:1.3.1-8.Final_redhat_00009.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-picketlink-bindings-0:2.5.5-23.SP12_redhat_00012.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-stax2-api-0:4.2.0-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-sun-istack-commons-0:3.0.10-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-thrift-0:0.13.0-1.redhat_00002.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-0:7.2.7-4.GA_redhat_00004.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-http-client-0:1.0.20-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-openssl-0:1.0.9-2.SP03_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-openssl-linux-x86_64-0:1.0.9-2.SP03_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-transaction-client-0:1.1.9-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-woodstox-core-0:6.0.3-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-xml-security-0:2.1.4-1.redhat_00001.1.el8eap*
Red Hat Process Automation 7RedHatnetty*
Red Hat Single Sign-On 7.3RedHatnetty*
Text-Only RHOARRedHatnetty*
NettyUbuntubionic*
NettyUbuntueoan*
NettyUbuntuesm-apps/bionic*
NettyUbuntuesm-apps/xenial*
NettyUbuntuesm-infra-legacy/trusty*
NettyUbuntutrusty*
NettyUbuntutrusty/esm*
NettyUbuntuxenial*
Netty-3.9Ubuntubionic*
Netty-3.9Ubuntuesm-apps/bionic*
Netty-3.9Ubuntuesm-apps/xenial*
Netty-3.9Ubuntutrusty*
Netty-3.9Ubuntuxenial*

Extended Description

HTTP requests or responses (“messages”) can be malformed or unexpected in ways that cause web servers or clients to interpret the messages in different ways than intermediary HTTP agents such as load balancers, reverse proxies, web caching proxies, application firewalls, etc. For example, an adversary may be able to add duplicate or different header fields that a client or server might interpret as one set of messages, whereas the intermediary might interpret the same sequence of bytes as a different set of messages. For example, discrepancies can arise in how to handle duplicate headers like two Transfer-encoding (TE) or two Content-length (CL), or the malicious HTTP message will have different headers for TE and CL. The inconsistent parsing and interpretation of messages can allow the adversary to “smuggle” a message to the client/server without the intermediary being aware of it. This weakness is usually the result of the usage of outdated or incompatible HTTP protocol versions in the HTTP agents.

Potential Mitigations

References

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