FKIE_CVE-2022-29169

Vulnerability from fkie_nvd - Published: 2022-06-01 23:15 - Updated: 2024-11-21 06:58
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
BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory.
References
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/pull/14886Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/pull/14896Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwpMitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/pull/14886Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/pull/14896Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwpMitigation, Patch, Third Party Advisory
Impacted products
Vendor Product Version
bigbluebutton bigbluebutton *
bigbluebutton bigbluebutton *
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
bigbluebutton bigbluebutton 2.5
To clipboard 

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              "matchCriteriaId": "3A9BA43E-5B7C-4B62-AE0E-72776BD3F281",
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              "versionStartIncluding": "2.2.0",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory."
    },
    {
      "lang": "es",
      "value": "BigBlueButton es un sistema de conferencias web de c\u00f3digo abierto. Las versiones a partir de 2.2 y anteriores a 2.3.19, 2.4.7 y 2.5.0-beta.2 son vulnerables a ataques de denegaci\u00f3n de servicio con expresiones regulares (ReDoS). Usando una RegularExpression espec\u00edfica, un atacante puede causar una denegaci\u00f3n de servicio para el servicio bbb-html5. La biblioteca useragent lleva a cabo una comprobaci\u00f3n del dispositivo al analizar la entrada del encabezado User-Agent y la hace pasar por lookupUserAgent() (alias de useragent.lookup() ). Esta funci\u00f3n maneja la entrada mediante regexing y atacantes pueden abusar de ello  al proporcionar alguna carga \u00fatil ReDos usando \"SmartWatch\". Los mantenedores han eliminado \"htmlclient/useragent\" de las versiones 2.3.19, 2.4.7 y 2.5.0-beta.2. Como mitigaci\u00f3n, deshabilite que NginX reenv\u00ede las peticiones al administrador seg\u00fan las indicaciones del aviso de seguridad de GitHub"
    }
  ],
  "id": "CVE-2022-29169",
  "lastModified": "2024-11-21T06:58:37.840",
  "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
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          "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"
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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      {
        "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",
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        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-06-01T23:15:07.970",
  "references": [
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      "tags": [
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        "Patch",
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
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  ]
}


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Sightings

Author Source Type Date

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.