CVE-2023-5379 Undertow: ajp request closes connection exceeding maxrequestsize

2023-12-1221:54:52

CWE-770

redhat

www.cve.org

undertow

ajp

maxrequestsize

dos

tcp

mod_cluster

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

21.2%

JSON

A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request without receiving an AJP response, and stops forwarding. This issue could allow a malicious user could to repeatedly send requests that exceed the max-header-size, causing a Denial of Service (DoS).

CNA Affected

[
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Enterprise Application Platform 7.1.0",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/a:redhat:jboss_enterprise_application_platform:7.4"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat build of Quarkus",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "io.quarkus/quarkus-undertow",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/a:redhat:quarkus:2"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Data Grid 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/a:redhat:jboss_data_grid:8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Decision Manager 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/a:redhat:jboss_enterprise_brms_platform:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Data Grid 7",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/a:redhat:jboss_data_grid:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Enterprise Application Platform 7",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:jboss_enterprise_application_platform:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Fuse 6",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/a:redhat:jboss_fuse:6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat JBoss Fuse 7",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/a:redhat:jboss_fuse:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Process Automation 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Single Sign-On 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:red_hat_single_sign_on:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat support for Spring Boot",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "undertow",
    "defaultStatus": "unaffected",
    "cpes": [
      "cpe:/a:redhat:openshift_application_runtimes:1.0"
    ]
  }
]