CVE-2024-1635

Summary

A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. Whenever a malicious user opens and closes a connection with the HTTP port of the server and then closes the connection immediately, the server will end with both memory and open file limits exhausted at some point, depending on the amount of memory available.

At HTTP upgrade to remoting, the WriteTimeoutStreamSinkConduit leaks connections if RemotingConnection is closed by Remoting ServerConnectionOpenListener. Because the remoting connection originates in Undertow as part of the HTTP upgrade, there is an external layer to the remoting connection. This connection is unaware of the outermost layer when closing the connection during the connection opening procedure. Hence, the Undertow WriteTimeoutStreamSinkConduit is not notified of the closed connection in this scenario. Because WriteTimeoutStreamSinkConduit creates a timeout task, the whole dependency tree leaks via that task, which is added to XNIO WorkerThread. So, the workerThread points to the Undertow conduit, which contains the connections and causes the leak.

Affected Software

VendorProductVersion RangeStatus
1.31.0affected
Red HatRed Hat JBoss Enterprise Application Platform2.2.30.SP1-redhat-00001 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:1.5.5.016-1.redhat_00001.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 71:1.5.5.016-1.redhat_00001.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:3.5.11-1.Final_redhat_00001.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:1.14.2-1.redhat_00002.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:1.4.18-14.SP13_redhat_00001.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:7.1.10-2.GA_redhat_00002.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:5.0.3-2.redhat_00002.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 70:2.0.10-2.redhat_00002.1.ep7.el7 < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-3.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-3.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-5.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-3.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-5.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.10.4-2.redhat_00006.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:1.7.2-16.Final_redhat_00017.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:4.1.63-5.Final_redhat_00003.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:2.0.41-4.SP5_redhat_00001.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:7.3.14-3.GA_redhat_00002.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 70:1.10.17-1.Final_redhat_00001.1.el7eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.4 for RHEL 80:2.2.30-1.SP1_redhat_00001.1.el8eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.4 for RHEL 90:2.2.30-1.SP1_redhat_00001.1.el9eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 7.4 on RHEL 70:2.2.30-1.SP1_redhat_00001.1.el7eap < *unaffected
Red HatRed Hat Single Sign-On 7.6 for RHEL 70:18.0.13-1.redhat_00001.1.el7sso < *unaffected
Red HatRed Hat Single Sign-On 7.6 for RHEL 80:18.0.13-1.redhat_00001.1.el8sso < *unaffected
Red HatRed Hat Single Sign-On 7.6 for RHEL 90:18.0.13-1.redhat_00001.1.el9sso < *unaffected
Red HatRHEL-8 based Middleware Containers7.6-46 < *unaffected

Weaknesses

  • CWE-400: Uncontrolled Resource Consumption

Workarounds

No mitigation is currently available for this vulnerability. However, there might be some protections, such as request limits by a load balancer in front of JBoss EAP/Wildfly or even Undertow, that could minimize the impact.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References