Bug#1068817: undertow: CVE-2024-1635

[Moritz Mühlenhoff]

Source: undertow
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for undertow.

CVE-2024-1635[0]:
| 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.

https://bugzilla.redhat.com/show_bug.cgi?id=2264928


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2024-1635
    https://www.cve.org/CVERecord?id=CVE-2024-1635

Please adjust the affected versions in the BTS as needed.