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CVE-2016-8741

Status: ModifiedHigh (7.5)—

The Apache Qpid Broker for Java can be configured to use different so called AuthenticationProviders to handle user authentication. Among the choices are the SCRAM-SHA-1 and SCRAM-SHA-256 AuthenticationProvider types. It was discovered that these AuthenticationProviders in Apache Qpid Broker for Java 6.0.x before 6.0.6 and 6.1.x before 6.1.1 prematurely terminate the SCRAM SASL negotiation if the provided user name does not exist thus allowing remote attacker to determine the existence of user accounts. The Vulnerability does not apply to AuthenticationProviders other than SCRAM-SHA-1 and SCRAM-SHA-256.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Apache — Qpid Broker-j

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-8741",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Qpid Broker-J",
          "versions": [
            {
              "status": "affected",
              "version": "6.0.1, 6.0.2, 6.0.3, 6.0.4, and 6.0.5"
            },
            {
              "status": "affected",
              "version": "6.1.0"
            }
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  ],
  "published": "2017-05-15T14:29:00.153",
  "references": [
    {
      "url": "http://qpid.2158936.n2.nabble.com/CVE-2016-8741-Apache-Qpid-Broker-for-Java-Information-Leakage-td7657025.html",
      "tags": [
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      "source": "security@apache.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/95136",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
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      "source": "security@apache.org"
    },
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      "url": "http://www.securitytracker.com/id/1037537",
      "tags": [
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        "Third Party Advisory",
        "VDB Entry"
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      "source": "security@apache.org"
    },
    {
      "url": "https://issues.apache.org/jira/browse/QPID-7599",
      "tags": [
        "Issue Tracking"
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      "source": "security@apache.org"
    },
    {
      "url": "http://qpid.2158936.n2.nabble.com/CVE-2016-8741-Apache-Qpid-Broker-for-Java-Information-Leakage-td7657025.html",
      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Apache Qpid Broker for Java can be configured to use different so called AuthenticationProviders to handle user authentication. Among the choices are the SCRAM-SHA-1 and SCRAM-SHA-256 AuthenticationProvider types. It was discovered that these AuthenticationProviders in Apache Qpid Broker for Java 6.0.x before 6.0.6 and 6.1.x before 6.1.1 prematurely terminate the SCRAM SASL negotiation if the provided user name does not exist thus allowing remote attacker to determine the existence of user accounts. The Vulnerability does not apply to AuthenticationProviders other than SCRAM-SHA-1 and SCRAM-SHA-256."
    },
    {
      "lang": "es",
      "value": "El Broker Qpid  de Apache para Java puede ser configurado para usar diferentes llamados AuthenticationProviders para manejar la autenticación de usuarios. Entre las opciones se encuentran los tipos AuthenticationProviders SCRAM-SHA-1 y SCRAM-SHA-256. Se detectó que estos AuthenticationProvider en Broker Qpid de Apache para Java versiones 6.0.x anteriores a 6.0.6 y versiones 6.1.x anteriores a 6.1.1, terminan prematuramente la negociación SASL de SCRAM si el nombre de usuario proporcionado no permite a un atacante remoto determinar la existencia de cuentas de usuario. La vulnerabilidad no se aplica a AuthenticationProviders que no sean SCRAM-SHA-1 y SCRAM-SHA-256."
    }
  ],
  "lastModified": "2026-06-17T00:54:55.573",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:apache:qpid_broker-j:6.0.1:*:*:*:*:*:*:*",
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              "vulnerable": true,
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            },
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  "sourceIdentifier": "security@apache.org"
}