CVE-2020-27782: High severity red hat jboss fuse vulnerability

Published Nov 24, 2020
·
Updated

A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Other sources

undertow handles certain query string characters improperly. An attacker could use this flaw to send a malicious request and trigger server errors, resulting in denial of service.

— Red Hat

Affected Software

66 affected componentsFixes available
redhat/eap7-activemq-artemis<0:2.9.0-7.redhat_00017.1.el6ea
0:2.9.0-7.redhat_00017.1.el6ea
redhat/eap7-glassfish-jsf<0:2.3.9-12.SP13_redhat_00001.1.el6ea
0:2.3.9-12.SP13_redhat_00001.1.el6ea
redhat/eap7-hal-console<0:3.2.12-1.Final_redhat_00001.1.el6ea
0:3.2.12-1.Final_redhat_00001.1.el6ea
redhat/eap7-hibernate<0:5.3.20-1.Final_redhat_00001.1.el6ea
0:5.3.20-1.Final_redhat_00001.1.el6ea
redhat/eap7-httpcomponents-client<0:4.5.13-1.redhat_00001.1.el6ea
0:4.5.13-1.redhat_00001.1.el6ea
redhat/eap7-jboss-ejb-client<0:4.0.37-1.Final_redhat_00001.1.el6ea
0:4.0.37-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-genericjms<0:2.0.8-1.Final_redhat_00001.1.el6ea
0:2.0.8-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-modules<0:1.11.0-1.Final_redhat_00001.1.el6ea
0:1.11.0-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-remoting<0:5.0.20-1.Final_redhat_00001.1.el6ea
0:5.0.20-1.Final_redhat_00001.1.el6ea
redhat/eap7-jboss-server-migration<0:1.7.2-4.Final_redhat_00005.1.el6ea
0:1.7.2-4.Final_redhat_00005.1.el6ea
redhat/eap7-jboss-xnio-base<0:3.7.12-1.Final_redhat_00001.1.el6ea
0:3.7.12-1.Final_redhat_00001.1.el6ea
redhat/eap7-narayana<0:5.9.10-1.Final_redhat_00001.1.el6ea
0:5.9.10-1.Final_redhat_00001.1.el6ea
redhat/eap7-opentracing-interceptors<0:0.0.4.1-2.redhat_00002.1.el6ea
0:0.0.4.1-2.redhat_00002.1.el6ea
redhat/eap7-resteasy<0:3.11.3-1.Final_redhat_00001.1.el6ea
0:3.11.3-1.Final_redhat_00001.1.el6ea
redhat/eap7-undertow<0:2.0.33-1.SP2_redhat_00001.1.el6ea
0:2.0.33-1.SP2_redhat_00001.1.el6ea
redhat/eap7-wildfly<0:7.3.5-2.GA_redhat_00001.1.el6ea
0:7.3.5-2.GA_redhat_00001.1.el6ea
redhat/eap7-wildfly-discovery<0:1.2.1-1.Final_redhat_00001.1.el6ea
0:1.2.1-1.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-elytron<0:1.10.10-1.Final_redhat_00001.1.el6ea
0:1.10.10-1.Final_redhat_00001.1.el6ea
redhat/eap7-wildfly-http-client<0:1.0.24-1.Final_redhat_00001.1.el6ea
0:1.0.24-1.Final_redhat_00001.1.el6ea
redhat/eap7-activemq-artemis<0:2.9.0-7.redhat_00017.1.el7ea
0:2.9.0-7.redhat_00017.1.el7ea
redhat/eap7-glassfish-jsf<0:2.3.9-12.SP13_redhat_00001.1.el7ea
0:2.3.9-12.SP13_redhat_00001.1.el7ea
redhat/eap7-hal-console<0:3.2.12-1.Final_redhat_00001.1.el7ea
0:3.2.12-1.Final_redhat_00001.1.el7ea
redhat/eap7-hibernate<0:5.3.20-1.Final_redhat_00001.1.el7ea
0:5.3.20-1.Final_redhat_00001.1.el7ea
redhat/eap7-httpcomponents-client<0:4.5.13-1.redhat_00001.1.el7ea
0:4.5.13-1.redhat_00001.1.el7ea
redhat/eap7-jboss-ejb-client<0:4.0.37-1.Final_redhat_00001.1.el7ea
0:4.0.37-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-genericjms<0:2.0.8-1.Final_redhat_00001.1.el7ea
0:2.0.8-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-modules<0:1.11.0-1.Final_redhat_00001.1.el7ea
0:1.11.0-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-remoting<0:5.0.20-1.Final_redhat_00001.1.el7ea
0:5.0.20-1.Final_redhat_00001.1.el7ea
redhat/eap7-jboss-server-migration<0:1.7.2-4.Final_redhat_00005.1.el7ea
0:1.7.2-4.Final_redhat_00005.1.el7ea
redhat/eap7-jboss-xnio-base<0:3.7.12-1.Final_redhat_00001.1.el7ea
0:3.7.12-1.Final_redhat_00001.1.el7ea
redhat/eap7-narayana<0:5.9.10-1.Final_redhat_00001.1.el7ea
0:5.9.10-1.Final_redhat_00001.1.el7ea
redhat/eap7-opentracing-interceptors<0:0.0.4.1-2.redhat_00002.1.el7ea
0:0.0.4.1-2.redhat_00002.1.el7ea
redhat/eap7-resteasy<0:3.11.3-1.Final_redhat_00001.1.el7ea
0:3.11.3-1.Final_redhat_00001.1.el7ea
redhat/eap7-undertow<0:2.0.33-1.SP2_redhat_00001.1.el7ea
0:2.0.33-1.SP2_redhat_00001.1.el7ea
redhat/eap7-wildfly<0:7.3.5-2.GA_redhat_00001.1.el7ea
0:7.3.5-2.GA_redhat_00001.1.el7ea
redhat/eap7-wildfly-discovery<0:1.2.1-1.Final_redhat_00001.1.el7ea
0:1.2.1-1.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-elytron<0:1.10.10-1.Final_redhat_00001.1.el7ea
0:1.10.10-1.Final_redhat_00001.1.el7ea
redhat/eap7-wildfly-http-client<0:1.0.24-1.Final_redhat_00001.1.el7ea
0:1.0.24-1.Final_redhat_00001.1.el7ea
redhat/eap7-activemq-artemis<0:2.9.0-7.redhat_00017.1.el8ea
0:2.9.0-7.redhat_00017.1.el8ea
redhat/eap7-glassfish-jsf<0:2.3.9-12.SP13_redhat_00001.1.el8ea
0:2.3.9-12.SP13_redhat_00001.1.el8ea
redhat/eap7-hal-console<0:3.2.12-1.Final_redhat_00001.1.el8ea
0:3.2.12-1.Final_redhat_00001.1.el8ea
redhat/eap7-hibernate<0:5.3.20-1.Final_redhat_00001.1.el8ea
0:5.3.20-1.Final_redhat_00001.1.el8ea
redhat/eap7-httpcomponents-client<0:4.5.13-1.redhat_00001.1.el8ea
0:4.5.13-1.redhat_00001.1.el8ea
redhat/eap7-jboss-ejb-client<0:4.0.37-1.Final_redhat_00001.1.el8ea
0:4.0.37-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-genericjms<0:2.0.8-1.Final_redhat_00001.1.el8ea
0:2.0.8-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-modules<0:1.11.0-1.Final_redhat_00001.1.el8ea
0:1.11.0-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-remoting<0:5.0.20-1.Final_redhat_00001.1.el8ea
0:5.0.20-1.Final_redhat_00001.1.el8ea
redhat/eap7-jboss-server-migration<0:1.7.2-4.Final_redhat_00005.1.el8ea
0:1.7.2-4.Final_redhat_00005.1.el8ea
redhat/eap7-jboss-xnio-base<0:3.7.12-1.Final_redhat_00001.1.el8ea
0:3.7.12-1.Final_redhat_00001.1.el8ea
redhat/eap7-narayana<0:5.9.10-1.Final_redhat_00001.1.el8ea
0:5.9.10-1.Final_redhat_00001.1.el8ea
redhat/eap7-opentracing-interceptors<0:0.0.4.1-2.redhat_00002.1.el8ea
0:0.0.4.1-2.redhat_00002.1.el8ea
redhat/eap7-resteasy<0:3.11.3-1.Final_redhat_00001.1.el8ea
0:3.11.3-1.Final_redhat_00001.1.el8ea
redhat/eap7-undertow<0:2.0.33-1.SP2_redhat_00001.1.el8ea
0:2.0.33-1.SP2_redhat_00001.1.el8ea
redhat/eap7-wildfly<0:7.3.5-2.GA_redhat_00001.1.el8ea
0:7.3.5-2.GA_redhat_00001.1.el8ea
redhat/eap7-wildfly-discovery<0:1.2.1-1.Final_redhat_00001.1.el8ea
0:1.2.1-1.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-elytron<0:1.10.10-1.Final_redhat_00001.1.el8ea
0:1.10.10-1.Final_redhat_00001.1.el8ea
redhat/eap7-wildfly-http-client<0:1.0.24-1.Final_redhat_00001.1.el8ea
0:1.0.24-1.Final_redhat_00001.1.el8ea
redhat/Undertow<2.1.5.
2.1.5.
redhat/Undertow<2.0.33.
2.0.33.
redhat/Undertow<2.2.3.
2.2.3.
redhat Jboss Fuse=6.0.0
redhat Jboss Fuse=7.0.0
redhat Openshift Application Runtimes
redhat undertow=2.0.33-sp2
redhat undertow=2.1.5-sp1
redhat undertow=2.2.3-sp1

Remediation

Information

The issue can be mitigated by using HTTP/1.1 instead of AJP to proxy to the back-end.

Event History

Nov 24, 2020
Data Sourced
via Red Hat·07:48 PM
DescriptionSeverityAffected Software
Jan 25, 2021
CVE Published
12:00 AM
Feb 23, 2021
CVE Published
via MITRE·06:35 PM
Data Sourced
via MITRE·06:35 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2020-27782?

The severity of CVE-2020-27782 is high, primarily impacting system availability.

2

How do I fix CVE-2020-27782?

To fix CVE-2020-27782, upgrade to the remedied versions of affected packages provided by Red Hat.

3

Which software is affected by CVE-2020-27782?

CVE-2020-27782 affects various Red Hat packages including undertow, jboss modules, and wildfly components.

4

Who is impacted by CVE-2020-27782?

Organizations using the affected Red Hat software in their applications are at risk of denial of service due to CVE-2020-27782.

5

What exploit can be carried out using CVE-2020-27782?

An attacker can exploit CVE-2020-27782 by sending malicious requests with non-RFC compliant characters, leading to potential denial of service.

Company

Resources

Contact

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