FKIE_CVE-2018-6851

Vulnerability from fkie_nvd - Published: 2018-07-09 18:29 - Updated: 2026-06-17 02:02
Severity
7.8 (High) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80206040. By crafting an input buffer we can control the execution path to the point where the constant DWORD 0 will be written to a user-controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM.
References
cve@mitre.orghttp://seclists.org/fulldisclosure/2018/Jul/20Mailing List, Third Party Advisory
cve@mitre.orghttps://community.sophos.com/kb/en-us/131934Patch, Vendor Advisory
cve@mitre.orghttps://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/Exploit, Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2018/Jul/20Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://community.sophos.com/kb/en-us/131934Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/Exploit, Technical Description, Third Party Advisory
Impacted products
Vendor Product Version
sophos safeguard_easy_device_encryption_client 6.00
sophos safeguard_easy_device_encryption_client 6.10
sophos safeguard_easy_device_encryption_client 7.00
sophos safeguard_enterprise_client 5.60.3
sophos safeguard_enterprise_client 6.00
sophos safeguard_enterprise_client 6.00.1
sophos safeguard_enterprise_client 6.10
sophos safeguard_enterprise_client 7.00
sophos safeguard_enterprise_client 8.00
sophos safeguard_lan_crypt_client 3.90.1
sophos safeguard_lan_crypt_client 3.90.2
sophos safeguard_lan_crypt_client 3.95.1
sophos safeguard_lan_crypt_client 3.95.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
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      ],
      "source": "cve@mitre.org"
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  "cveTags": [],
  "descriptions": [
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      "value": "Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80206040. By crafting an input buffer we can control the execution path to the point where the constant DWORD 0 will be written to a user-controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM."
    },
    {
      "lang": "es",
      "value": "Sophos SafeGuard Enterprise en versiones anteriores a la 8.00.5, SafeGuard Easy en versiones anteriores a la 7.00.3, y SafeGuard LAN Crypt en versiones anteriores a la 3.95.2 son vulnerables a una escalada de privilegios local mediante IOCTL 0x80206040. Manipulando un b\u00fafer de entrada, es posible controlar la ruta de ejecuci\u00f3n al punto en el que la constante DWORD 0 se escribir\u00e1 en una direcci\u00f3n controlada por el usuario. Se puede aprovechar esta situaci\u00f3n para eliminar el puntero al descriptor de seguridad en la cabecera del objeto de un proceso privilegiado o modificar el descriptor de seguridad en s\u00ed para ejecutar c\u00f3digo en el contexto de un proceso que se est\u00e1 ejecutando como SYSTEM."
    }
  ],
  "id": "CVE-2018-6851",
  "lastModified": "2026-06-17T02:02:21.333",
  "metrics": {
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        "baseSeverity": "HIGH",
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          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2018-07-09T18:29:00.623",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
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  ]
}



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