CVE-2019-16869: XSS
Published Sep 26, 2019
·Updated
A flaw was found in Netty, where whitespace before the colon in HTTP headers is mishandled. This flaw allows an attacker to cause HTTP request smuggling.
Other sources
Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.
Netty is vulnerable to HTTP request smuggling, caused by a flaw when handling unusual whitespaces before the colon in HTTP headers. By sending a specially-crafted request, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.
— IBM
Affected Software
97 affected componentsFixes available
debian/netty<=1:4.1.33-1, <=1:4.1.7-2
1:4.1.33-21:4.1.33-1+deb10u11:4.1.7-2+deb9u1
redhat/eap7-apache-cxf<0:3.2.11-1.redhat_00001.1.el6ea
0:3.2.11-1.redhat_00001.1.el6ea
redhat/eap7-glassfish-jsf<0:2.3.5-6.SP3_redhat_00004.1.el6ea
0:2.3.5-6.SP3_redhat_00004.1.el6ea
redhat/eap7-hal-console<0:3.0.19-1.Final_redhat_00001.1.el6ea
0:3.0.19-1.Final_redhat_00001.1.el6ea
redhat/eap7-hibernate<0:5.3.14-1.Final_redhat_00001.1.el6ea
0:5.3.14-1.Final_redhat_00001.1.el6ea
redhat/eap7-hibernate-validator<0:6.0.18-1.Final_redhat_00001.1.el6ea
0:6.0.18-1.Final_redhat_00001.1.el6ea
redhat/eap7-jackson-annotations<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jackson-core<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jackson-databind<0:2.9.10.1-1.redhat_00001.1.el6ea
0:2.9.10.1-1.redhat_00001.1.el6ea
redhat/eap7-jackson-dataformats-binary<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jackson-dataformats-text<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jackson-jaxrs-providers<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jackson-modules-base<0:2.9.10-2.redhat_00003.1.el6ea
0:2.9.10-2.redhat_00003.1.el6ea
redhat/eap7-jackson-modules-java8<0:2.9.10-1.redhat_00003.1.el6ea
0:2.9.10-1.redhat_00003.1.el6ea
redhat/eap7-jberet<0:1.3.5-1.Final_redhat_00001.1.el6ea
0:1.3.5-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-ejb-client<0:4.0.27-1.Final_redhat_00001.1.el6ea
0:4.0.27-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-server-migration<0:1.3.1-7.Final_redhat_00007.1.el6ea
0:1.3.1-7.Final_redhat_00007.1.el6ea
redhat/eap7-jboss-xnio-base<0:3.7.6-3.SP2_redhat_00001.1.el6ea
0:3.7.6-3.SP2_redhat_00001.1.el6ea
redhat/eap7-netty<0:4.1.42-1.Final_redhat_00001.1.el6ea
0:4.1.42-1.Final_redhat_00001.1.el6ea
redhat/eap7-picketlink-bindings<0:2.5.5-21.SP12_redhat_00010.1.el6ea
0:2.5.5-21.SP12_redhat_00010.1.el6ea
redhat/eap7-undertow<0:2.0.28-2.SP1_redhat_00001.1.el6ea
0:2.0.28-2.SP1_redhat_00001.1.el6ea
redhat/eap7-undertow-jastow<0:2.0.8-1.Final_redhat_00001.1.el6ea
0:2.0.8-1.Final_redhat_00001.1.el6ea
redhat/eap7-weld-core<0:3.0.6-3.Final_redhat_00003.1.el6ea
0:3.0.6-3.Final_redhat_00003.1.el6ea
redhat/eap7-wildfly<0:7.2.6-5.GA_redhat_00001.1.el6ea
0:7.2.6-5.GA_redhat_00001.1.el6ea
redhat/eap7-wildfly-http-client<0:1.0.18-2.Final_redhat_00001.1.el6ea
0:1.0.18-2.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-transaction-client<0:1.1.8-1.Final_redhat_00001.1.el6ea
0:1.1.8-1.Final_redhat_00001.1.el6ea
redhat/eap7-apache-cxf<0:3.2.11-1.redhat_00001.1.el7ea
0:3.2.11-1.redhat_00001.1.el7ea
redhat/eap7-glassfish-jsf<0:2.3.5-6.SP3_redhat_00004.1.el7ea
0:2.3.5-6.SP3_redhat_00004.1.el7ea
redhat/eap7-hal-console<0:3.0.19-1.Final_redhat_00001.1.el7ea
0:3.0.19-1.Final_redhat_00001.1.el7ea
redhat/eap7-hibernate<0:5.3.14-1.Final_redhat_00001.1.el7ea
0:5.3.14-1.Final_redhat_00001.1.el7ea
redhat/eap7-hibernate-validator<0:6.0.18-1.Final_redhat_00001.1.el7ea
0:6.0.18-1.Final_redhat_00001.1.el7ea
redhat/eap7-jackson-annotations<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jackson-core<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jackson-databind<0:2.9.10.1-1.redhat_00001.1.el7ea
0:2.9.10.1-1.redhat_00001.1.el7ea
redhat/eap7-jackson-dataformats-binary<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jackson-dataformats-text<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jackson-jaxrs-providers<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jackson-modules-base<0:2.9.10-2.redhat_00003.1.el7ea
0:2.9.10-2.redhat_00003.1.el7ea
redhat/eap7-jackson-modules-java8<0:2.9.10-1.redhat_00003.1.el7ea
0:2.9.10-1.redhat_00003.1.el7ea
redhat/eap7-jberet<0:1.3.5-1.Final_redhat_00001.1.el7ea
0:1.3.5-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-ejb-client<0:4.0.27-1.Final_redhat_00001.1.el7ea
0:4.0.27-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-server-migration<0:1.3.1-7.Final_redhat_00007.1.el7ea
0:1.3.1-7.Final_redhat_00007.1.el7ea
redhat/eap7-jboss-xnio-base<0:3.7.6-3.SP2_redhat_00001.1.el7ea
0:3.7.6-3.SP2_redhat_00001.1.el7ea
redhat/eap7-netty<0:4.1.42-1.Final_redhat_00001.1.el7ea
0:4.1.42-1.Final_redhat_00001.1.el7ea
redhat/eap7-picketlink-bindings<0:2.5.5-21.SP12_redhat_00010.1.el7ea
0:2.5.5-21.SP12_redhat_00010.1.el7ea
redhat/eap7-undertow<0:2.0.28-2.SP1_redhat_00001.1.el7ea
0:2.0.28-2.SP1_redhat_00001.1.el7ea
redhat/eap7-undertow-jastow<0:2.0.8-1.Final_redhat_00001.1.el7ea
0:2.0.8-1.Final_redhat_00001.1.el7ea
redhat/eap7-weld-core<0:3.0.6-3.Final_redhat_00003.1.el7ea
0:3.0.6-3.Final_redhat_00003.1.el7ea
redhat/eap7-wildfly<0:7.2.6-5.GA_redhat_00001.1.el7ea
0:7.2.6-5.GA_redhat_00001.1.el7ea
redhat/eap7-wildfly-http-client<0:1.0.18-2.Final_redhat_00001.1.el7ea
0:1.0.18-2.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-transaction-client<0:1.1.8-1.Final_redhat_00001.1.el7ea
0:1.1.8-1.Final_redhat_00001.1.el7ea
redhat/eap7-apache-cxf<0:3.2.11-1.redhat_00001.1.el8ea
0:3.2.11-1.redhat_00001.1.el8ea
redhat/eap7-glassfish-jsf<0:2.3.5-6.SP3_redhat_00004.1.el8ea
0:2.3.5-6.SP3_redhat_00004.1.el8ea
redhat/eap7-hal-console<0:3.0.19-1.Final_redhat_00001.1.el8ea
0:3.0.19-1.Final_redhat_00001.1.el8ea
redhat/eap7-hibernate<0:5.3.14-1.Final_redhat_00001.1.el8ea
0:5.3.14-1.Final_redhat_00001.1.el8ea
redhat/eap7-hibernate-validator<0:6.0.18-1.Final_redhat_00001.1.el8ea
0:6.0.18-1.Final_redhat_00001.1.el8ea
redhat/eap7-jackson-annotations<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jackson-core<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jackson-databind<0:2.9.10.1-1.redhat_00001.1.el8ea
0:2.9.10.1-1.redhat_00001.1.el8ea
redhat/eap7-jackson-dataformats-binary<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jackson-dataformats-text<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jackson-jaxrs-providers<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jackson-modules-base<0:2.9.10-2.redhat_00003.1.el8ea
0:2.9.10-2.redhat_00003.1.el8ea
redhat/eap7-jackson-modules-java8<0:2.9.10-1.redhat_00003.1.el8ea
0:2.9.10-1.redhat_00003.1.el8ea
redhat/eap7-jberet<0:1.3.5-1.Final_redhat_00001.1.el8ea
0:1.3.5-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-ejb-client<0:4.0.27-1.Final_redhat_00001.1.el8ea
0:4.0.27-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-server-migration<0:1.3.1-7.Final_redhat_00007.1.el8ea
0:1.3.1-7.Final_redhat_00007.1.el8ea
redhat/eap7-jboss-xnio-base<0:3.7.6-3.SP2_redhat_00001.1.el8ea
0:3.7.6-3.SP2_redhat_00001.1.el8ea
redhat/eap7-netty<0:4.1.42-1.Final_redhat_00001.1.el8ea
0:4.1.42-1.Final_redhat_00001.1.el8ea
redhat/eap7-picketlink-bindings<0:2.5.5-21.SP12_redhat_00010.1.el8ea
0:2.5.5-21.SP12_redhat_00010.1.el8ea
redhat/eap7-undertow<0:2.0.28-2.SP1_redhat_00001.1.el8ea
0:2.0.28-2.SP1_redhat_00001.1.el8ea
redhat/eap7-undertow-jastow<0:2.0.8-1.Final_redhat_00001.1.el8ea
0:2.0.8-1.Final_redhat_00001.1.el8ea
redhat/eap7-weld-core<0:3.0.6-3.Final_redhat_00003.1.el8ea
0:3.0.6-3.Final_redhat_00003.1.el8ea
redhat/eap7-wildfly<0:7.2.6-5.GA_redhat_00001.1.el8ea
0:7.2.6-5.GA_redhat_00001.1.el8ea
redhat/eap7-wildfly-http-client<0:1.0.18-2.Final_redhat_00001.1.el8ea
0:1.0.18-2.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-transaction-client<0:1.1.8-1.Final_redhat_00001.1.el8ea
0:1.1.8-1.Final_redhat_00001.1.el8ea
maven/io.netty:netty-all>=4.0.0.Alpha1<4.1.42.Final
4.1.42.Final
maven/org.jboss.netty:netty<4.0.0
Netty Netty<4.1.42
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Canonical Ubuntu Linux=18.04
redhat JBoss Enterprise Application Platform=7.2
redhat JBoss Enterprise Application Platform=7.3
redhat JBoss Enterprise Application Platform=7.4
redhat Enterprise Linux=6.0
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
All of the following
Any of the following
redhat JBoss Enterprise Application Platform=7.2
redhat JBoss Enterprise Application Platform=7.3
redhat JBoss Enterprise Application Platform=7.4
Any of the following
redhat Enterprise Linux=6.0
redhat Enterprise Linux=7.0
redhat Enterprise Linux=8.0
redhat/netty<4.1.42.
4.1.42.
debian/netty
1:4.1.48-4+deb11u21:4.1.48-7+deb12u11:4.1.48-101:4.1.48-16
Remediation
Patch Available
Information
* Use HTTP/2 instead (clear boundaries between requests)
* Disable reuse of backend connections eg. ```http-reuse never``` in HAProxy or whatever equivalent LB settings
Event History
Sep 26, 2019
CVE Published
12:00 AM
CVE Published
via MITRE·03:28 PM
Data Sourced
via MITRE·03:28 PM
Description
Data Sourced
via NVD·04:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 4, 2019
Data Sourced
via Red Hat·03:50 PM
DescriptionSeverityAffected Software
Oct 11, 2019
Advisory Published
via GitHub·06:41 PM
Aug 3, 2024
Data Sourced
via IBM·05:47 PM
DescriptionSeverityAffected Software
Feb 23, 2026
Data Sourced
via Ubuntu·03:18 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Debian·03:19 PM
DescriptionAffected Software
Data Sourced
via Launchpad·03:19 PM
Description
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
1
What is the severity of CVE-2019-16869?
CVE-2019-16869 is considered a moderate severity vulnerability as it enables HTTP request smuggling due to improper handling of whitespace in HTTP headers.
2
How do I fix CVE-2019-16869?
To fix CVE-2019-16869, upgrade to Netty version 4.1.42.Final or later.
3
Which versions of Netty are affected by CVE-2019-16869?
CVE-2019-16869 affects Netty versions prior to 4.1.42.Final.
4
What types of attacks can CVE-2019-16869 facilitate?
CVE-2019-16869 can facilitate HTTP request smuggling attacks, potentially allowing attackers to bypass security controls.
5
What software packages are impacted by CVE-2019-16869?
CVE-2019-16869 impacts various software packages, including Netty, Red Hat JBoss Enterprise Application Platform, and Debian packages that employ vulnerable versions.