CVE-2024-1635 Undertow: out-of-memory error after several closed connections with wildfly-http-client protocol

2024-02-1921:23:14

CWE-400

redhat

www.cve.org

undertow

vulnerability

wildfly-http-client

out-of-memory error

unclosed connection

server

remotingconnection

http upgrade

memory exhaustion

7.5 High

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

7.7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.2%

JSON

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.

CNA Affected

[
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    "defaultStatus": "unaffected",
    "packageName": "undertow",
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    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "eap7-undertow",
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        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
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    ]
  },
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    ]
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    ]
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  {
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  {
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    "packageName": "rh-sso-7/sso76-openshift-rhel8",
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    "cpes": [
      "cpe:/a:redhat:rhosemc:1.0::el8"
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    "vendor": "Red Hat",
    "product": "RHSSO 7.6.8",
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    "product": "OpenShift Serverless",
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  {
    "vendor": "Red Hat",
    "product": "Red Hat build of Apache Camel 4.0 for Spring Boot",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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  {
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    "product": "Red Hat Build of Keycloak",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
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    "cpes": [
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  {
    "vendor": "Red Hat",
    "product": "Red Hat build of OptaPlanner 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "unaffected",
    "cpes": [
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    "product": "Red Hat Data Grid 8",
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    "product": "Red Hat Integration Camel K",
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    "packageName": "undertow",
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    "cpes": [
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    "vendor": "Red Hat",
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    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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    "cpes": [
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    ]
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  {
    "vendor": "Red Hat",
    "product": "Red Hat Integration Service Registry",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:service_registry:2"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Data Grid 7",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
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    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Enterprise Application Platform 8",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "unaffected",
    "cpes": [
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    ]
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  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Fuse 7",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
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    "product": "Red Hat JBoss Fuse Service Works 6",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
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    "vendor": "Red Hat",
    "product": "Red Hat Process Automation 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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    "cpes": [
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]