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CVE-2024-1635

HIGHCVSS 7.5/10EPSS 4.57%

Last modified

CVE-2024-1635 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability was found in Undertow. This vulnerability impacts a server that supports the wildfly-http-client protocol. EPSS estimates a 4.57% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
4.57%

90.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NetappActive Iq Unified ManagerAll versions
NetappOncommand Workflow AutomationAll versions
RedhatFuse1.0
RedhatIntegration Camel For Spring BootAll versions
RedhatJboss Enterprise Application Platform7.4
RedhatOpenshift Container Platform4.11
RedhatOpenshift Container Platform4.12
RedhatOpenshift Container Platform For Linuxone4.9
RedhatOpenshift Container Platform For Linuxone4.10
RedhatOpenshift Container Platform For Power4.9
RedhatOpenshift Container Platform For Power4.10
RedhatSingle Sign-OnAll versions
RedhatSingle Sign-On7.6

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2024-1635?
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.
How severe is CVE-2024-1635?
CVE-2024-1635 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.57% probability of exploitation in the next 30 days.
How do I fix CVE-2024-1635?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST