It was found that URLResource.getLastModified() in Undertow closes the file descriptors only when they are finalized which can cause file descriptors to exhaust. This leads to a file handler leak.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Undertow | Redhat | - (including) | - (including) |
| Virtualization | Redhat | 4.0 (including) | 4.0 (including) |
| Virtualization | Redhat | 4.2 (including) | 4.2 (including) |
| Virtualization_host | Redhat | 4.0 (including) | 4.0 (including) |
| Red Hat JBoss EAP 7.1 | RedHat | * | |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-activemq-artemis-0:1.5.5.012-1.redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-commons-logging-jboss-logmanager-0:1.0.3-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-hibernate-0:5.1.14-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-infinispan-0:8.2.11-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-ironjacamar-0:1.4.9-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jackson-databind-0:2.8.11.1-1.redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jackson-jaxrs-providers-0:2.8.11-2.redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jackson-module-jaxb-annotations-0:2.8.11-2.redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jboss-logmanager-0:2.0.10-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jboss-marshalling-0:2.0.5-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jboss-modules-0:1.6.4-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jboss-remoting-0:5.0.7-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-jboss-server-migration-0:1.0.6-3.Final_redhat_3.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-picketlink-bindings-0:2.5.5-12.SP11_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-picketlink-federation-0:2.5.5-12.SP11_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-undertow-0:1.4.18-6.SP7_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-0:7.1.3-2.GA_redhat_2.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-elytron-0:1.1.10-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-elytron-tool-0:1.0.7-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-javadocs-0:7.1.3-1.GA_redhat_2.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-naming-client-0:1.0.8-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-openssl-0:1.0.6-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 | RedHat | eap7-wildfly-web-console-eap-0:2.9.17-1.Final_redhat_1.1.ep7.el6 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-activemq-artemis-0:1.5.5.012-1.redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-commons-logging-jboss-logmanager-0:1.0.3-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-hibernate-0:5.1.14-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-infinispan-0:8.2.11-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-ironjacamar-0:1.4.9-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jackson-databind-0:2.8.11.1-1.redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jackson-jaxrs-providers-0:2.8.11-2.redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jackson-module-jaxb-annotations-0:2.8.11-2.redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jboss-logmanager-0:2.0.10-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jboss-marshalling-0:2.0.5-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jboss-modules-0:1.6.4-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jboss-remoting-0:5.0.7-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-jboss-server-migration-0:1.0.6-3.Final_redhat_3.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-picketlink-bindings-0:2.5.5-12.SP11_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-picketlink-federation-0:2.5.5-12.SP11_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-undertow-0:1.4.18-6.SP7_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-0:7.1.3-2.GA_redhat_2.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-elytron-0:1.1.10-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-elytron-tool-0:1.0.7-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-javadocs-0:7.1.3-1.GA_redhat_2.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-naming-client-0:1.0.8-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-openssl-0:1.0.6-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 | RedHat | eap7-wildfly-web-console-eap-0:2.9.17-1.Final_redhat_1.1.ep7.el7 | * |
| Red Hat JBoss Fuse 7 | RedHat | undertow | * |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | RedHat | rhvm-appliance-0:4.2-20180828.0.el7 | * |
| Text-Only RHOAR | RedHat | * | |
| Undertow | Ubuntu | artful | * |
| Undertow | Ubuntu | bionic | * |
| Undertow | Ubuntu | cosmic | * |
| Undertow | Ubuntu | eoan | * |
| Undertow | Ubuntu | focal | * |
| Undertow | Ubuntu | groovy | * |
| Undertow | Ubuntu | hirsute | * |
| Undertow | Ubuntu | impish | * |
| Undertow | Ubuntu | kinetic | * |
| Undertow | Ubuntu | upstream | * |
| Undertow | Ubuntu | xenial | * |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.