fkie_cve-2020-15813
Vulnerability from fkie_nvd
Published
2020-07-17 19:15
Modified
2024-11-21 05:06
Severity ?
Summary
Graylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers. It allows use of an external user/group database stored in LDAP. The connection configuration allows the usage of unencrypted, SSL- or TLS-secured connections. Unfortunately, the Graylog client code (in all versions that support LDAP) does not implement proper certificate validation (regardless of whether the "Allow self-signed certificates" option is used). Therefore, any attacker with the ability to intercept network traffic between a Graylog server and an LDAP server is able to redirect traffic to a different LDAP server (unnoticed by the Graylog server due to the lack of certificate validation), effectively bypassing Graylog's authentication mechanism.
References
| ▼ | URL | Tags | |
|---|---|---|---|
| cve@mitre.org | https://github.com/Graylog2/graylog2-server/issues/5906 | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/Graylog2/graylog2-server/issues/5906 | Third Party Advisory |
{
"configurations": [
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"nodes": [
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"cpeMatch": [
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"criteria": "cpe:2.3:a:graylog:graylog:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F9A21A46-6422-4E60-ADAA-9605AB691F95",
"versionEndExcluding": "3.3.3",
"vulnerable": true
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"negate": false,
"operator": "OR"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Graylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers. It allows use of an external user/group database stored in LDAP. The connection configuration allows the usage of unencrypted, SSL- or TLS-secured connections. Unfortunately, the Graylog client code (in all versions that support LDAP) does not implement proper certificate validation (regardless of whether the \"Allow self-signed certificates\" option is used). Therefore, any attacker with the ability to intercept network traffic between a Graylog server and an LDAP server is able to redirect traffic to a different LDAP server (unnoticed by the Graylog server due to the lack of certificate validation), effectively bypassing Graylog\u0027s authentication mechanism."
},
{
"lang": "es",
"value": "Graylog versiones anteriores a 3.3.3, carece de una comprobaci\u00f3n de certificado SSL para servidores LDAP. Permite el uso de una base de datos de usuarios y grupos externos almacenados en LDAP. La configuraci\u00f3n de la conexi\u00f3n permite el uso de conexiones sin cifrar, con seguridad SSL o TLS. Desafortunadamente, el c\u00f3digo del cliente Graylog (en todas las versiones que admiten LDAP) no implementa una comprobaci\u00f3n de certificado adecuada (independientemente de si se usa la opci\u00f3n \"Allow self-signed certificates\"). Por lo tanto, cualquier atacante con la capacidad de interceptar el tr\u00e1fico de red entre un servidor Graylog y un servidor LDAP puede redireccionar el tr\u00e1fico hacia un servidor LDAP diferente (desapercibido por el servidor Graylog debido a la falta de comprobaci\u00f3n del certificado), omitiendo efectivamente el mecanismo de autenticaci\u00f3n de Graylog"
}
],
"id": "CVE-2020-15813",
"lastModified": "2024-11-21T05:06:13.953",
"metrics": {
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"acInsufInfo": false,
"baseSeverity": "MEDIUM",
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
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"impactScore": 6.4,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"source": "nvd@nist.gov",
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"published": "2020-07-17T19:15:12.547",
"references": [
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"source": "cve@mitre.org",
"tags": [
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"url": "https://github.com/Graylog2/graylog2-server/issues/5906"
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"vulnStatus": "Modified",
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"lang": "en",
"value": "CWE-295"
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"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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