CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
13.8%
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.
Vendor | Product | Version | CPE |
---|---|---|---|
io.undertow | undertow-core | * | cpe:2.3:a:io.undertow:undertow-core:*:*:*:*:*:*:*:* |
access.redhat.com/errata/RHSA-2024:1674
access.redhat.com/errata/RHSA-2024:1675
access.redhat.com/errata/RHSA-2024:1676
access.redhat.com/errata/RHSA-2024:1677
access.redhat.com/errata/RHSA-2024:1860
access.redhat.com/errata/RHSA-2024:1861
access.redhat.com/errata/RHSA-2024:1862
access.redhat.com/errata/RHSA-2024:1864
access.redhat.com/errata/RHSA-2024:1866
access.redhat.com/security/cve/CVE-2024-1635
bugzilla.redhat.com/show_bug.cgi?id=2264928
github.com/advisories/GHSA-w6qf-42m7-vh68
github.com/undertow-io/undertow/commit/3cdb104e225f34547ce9fd6eb8799eb68e040f19
github.com/undertow-io/undertow/commit/7d388c5aae9b82afb63f24e3b6a2044838dfb4de
nvd.nist.gov/vuln/detail/CVE-2024-1635
security.netapp.com/advisory/ntap-20240322-0007