GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-4040 (GCVE-0-2021-4040)

Vulnerability from cvelistv5 – Published: 2022-08-24 15:13 – Updated: 2024-08-03 17:16
VLAI
Summary
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-400 - - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a AMQ Broker Affected: Fixed in v2.19.1, v2.20.0
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:16:03.705Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028254"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2021-4040"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://issues.apache.org/jira/browse/ARTEMIS-3593"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/apache/activemq-artemis/pull/3871/commits"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "AMQ Broker",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in v2.19.1, v2.20.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400 - Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-08-24T15:13:07.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028254"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2021-4040"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://issues.apache.org/jira/browse/ARTEMIS-3593"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apache/activemq-artemis/pull/3871/commits"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-4040",
    "datePublished": "2022-08-24T15:13:07.000Z",
    "dateReserved": "2021-12-02T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:16:03.705Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-4040",
      "date": "2026-09-20",
      "epss": "0.03127",
      "percentile": "0.87275"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "AMQ Broker",
                "vendor": "n/a",
                "versions": [
                  {
                    "status": "affected",
                    "version": "Fixed in v2.19.1, v2.20.0"
                  }
                ]
              }
            ],
            "source": "secalert@redhat.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:redhat:amq_broker:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "4B56B867-75FC-47C5-94C7-B96DC3028D64",
                    "versionEndExcluding": "7.10.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:apache:artemis:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7AEFF426-5FF5-4E11-8CCC-185601871BBF",
                    "versionEndExcluding": "2.19.1",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability."
          },
          {
            "lang": "es",
            "value": "Se ha encontrado un fallo en AMQ Broker. Este problema puede causar una interrupci\u00f3n parcial de la disponibilidad de AMQ Broker por medio de una condici\u00f3n de Out of memory (OOM). Este fallo permite a un atacante interrumpir parcialmente la disponibilidad del broker mediante un ataque sostenido de mensajes maliciosamente dise\u00f1ados. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema."
          }
        ],
        "id": "CVE-2021-4040",
        "lastModified": "2026-06-17T04:18:56.357",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-08-24T16:15:09.313",
        "references": [
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2021-4040"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Issue Tracking",
              "Vendor Advisory"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028254"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/apache/activemq-artemis/pull/3871/commits"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://issues.apache.org/jira/browse/ARTEMIS-3593"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2021-4040"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Issue Tracking",
              "Vendor Advisory"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2028254"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/apache/activemq-artemis/pull/3871/commits"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://issues.apache.org/jira/browse/ARTEMIS-3593"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-400"
              }
            ],
            "source": "secalert@redhat.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T17:11:26+00:00",
      "cve": "CVE-2021-4040",
      "id": "CVE-2021-4040",
      "initial_release_date": "2021-11-19T12:05:00+00:00",
      "product_status:fixed": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Broker: Malformed message can result in partial DoS (OOM)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-4040.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.