FKIE_CVE-2021-43859

Vulnerability from fkie_nvd - Published: 2022-02-01 12:15 - Updated: 2026-06-17 04:11
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.
References
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2022/02/09/1Mailing List, Third Party Advisory
security-advisories@github.comhttps://github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/x-stream/xstream/security/advisories/GHSA-rmr5-cpv2-vgjfExploit, Third Party Advisory
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2022/02/msg00018.htmlMailing List, Third Party Advisory
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VACQYG356OHUTD5WQGAQ4L2TTFTAV3SJ/Mailing List
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XODFRE2ZL64FICBJDOPWOLPTSSAI4U7X/Mailing List
security-advisories@github.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
security-advisories@github.comhttps://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
security-advisories@github.comhttps://x-stream.github.io/CVE-2021-43859.htmlExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2022/02/09/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/x-stream/xstream/security/advisories/GHSA-rmr5-cpv2-vgjfExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/02/msg00018.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/12/msg00023.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VACQYG356OHUTD5WQGAQ4L2TTFTAV3SJ/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XODFRE2ZL64FICBJDOPWOLPTSSAI4U7X/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://x-stream.github.io/CVE-2021-43859.htmlExploit, Vendor Advisory
Impacted products
Vendor Product Version
jenkins jenkins *
jenkins jenkins *
xstream xstream *
fedoraproject fedora 34
fedoraproject fedora 35
debian debian_linux 9.0
oracle commerce_guided_search 11.3.2
oracle communications_brm_-_elastic_charging_engine *
oracle communications_brm_-_elastic_charging_engine 12.0.0.5.0
oracle communications_cloud_native_core_automated_test_suite 1.9.0
oracle communications_diameter_intelligence_hub *
oracle communications_diameter_intelligence_hub *
oracle communications_policy_management 12.6.0.0.0
oracle flexcube_private_banking 12.1.0
oracle retail_xstore_point_of_service 16.0.6
oracle retail_xstore_point_of_service 17.0.4
oracle retail_xstore_point_of_service 18.0.3
oracle retail_xstore_point_of_service 19.0.2
oracle retail_xstore_point_of_service 20.0.1
To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible."
    },
    {
      "lang": "es",
      "value": "XStream es una biblioteca java de c\u00f3digo abierto para serializar objetos a XML y viceversa. Las versiones anteriores a 1.4.19, pueden permitir a un atacante remoto asignar el 100% del tiempo de la CPU en el sistema de destino, dependiendo del tipo de CPU o de la ejecuci\u00f3n en paralelo de dicha carga \u00fatil, resultando en una denegaci\u00f3n de servicio \u00fanicamente mediante la manipulaci\u00f3n del flujo de entrada procesado. XStream versi\u00f3n 1.4.19 monitoriza y acumula el tiempo que tarda en a\u00f1adir elementos a las colecciones y lanza una excepci\u00f3n si es superado un umbral establecido. Se recomienda a usuarios que actualicen lo antes posible. Los usuarios que no puedan actualizar pueden establecer el modo NO_REFERENCE para impedir una recursi\u00f3n. Ver GHSA-rmr5-cpv2-vgjf para m\u00e1s detalles sobre una medida de mitigaci\u00f3n adicional si una actualizaci\u00f3n no es posible"
    }
  ],
  "id": "CVE-2021-43859",
  "lastModified": "2026-06-17T04:11:35.370",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-43859",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-22T15:42:17.720370Z",
          "version": "2.0.3"
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  },
  "published": "2022-02-01T12:15:08.080",
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
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      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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.



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.