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FKIE_CVE-2018-1139

Vulnerability from fkie_nvd - Published: 2018-08-22 14:29 - Updated: 2026-06-17 01:50
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.
References
secalert@redhat.comhttp://www.securityfocus.com/bid/105084Third Party Advisory, VDB Entry
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:2612Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:2613Third Party Advisory
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2018:3056Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202003-52Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20180814-0001/Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3738-1/Third Party Advisory
secalert@redhat.comhttps://www.samba.org/samba/security/CVE-2018-1139.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/105084Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:2612Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:2613Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3056Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-52Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20180814-0001/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3738-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.samba.org/samba/security/CVE-2018-1139.htmlThird Party Advisory
Impacted products
Vendor Product Version
samba samba *
samba samba *
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
redhat enterprise_linux_desktop 7.0
redhat enterprise_linux_server 7.0
redhat enterprise_linux_workstation 7.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "samba",
          "vendor": "The Samba Team",
          "versions": [
            {
              "status": "affected",
              "version": "before 4.7.9"
            },
            {
              "status": "affected",
              "version": "before 4.8.4"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D2D88D65-4DCC-44B4-9671-1D2C5FE598D9",
              "versionEndExcluding": "4.7.9",
              "versionStartIncluding": "4.7.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "24E405D2-03BC-4808-A8F1-1C4BF24CFCCA",
              "versionEndExcluding": "4.8.4",
              "versionStartIncluding": "4.8.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D",
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            {
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              "vulnerable": true
            },
            {
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              "vulnerable": true
            },
            {
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              "matchCriteriaId": "825ECE2D-E232-46E0-A047-074B34DB1E97",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un fallo en la manera en la que samba en versiones anteriores a la 4.7.9 y 4.8.4 permit\u00eda el uso de la autenticaci\u00f3n NTLMv1 d\u00e9bil incluso cuando NTLMv1 estaba expl\u00edcitamente deshabilitado. Un atacante Man-in-the-Middle (MitM) podr\u00eda utilizar este fallo para leer la credencial y otros detalles pasados entre el servidor y cliente de samba."
    }
  ],
  "id": "CVE-2018-1139",
  "lastModified": "2026-06-17T01:50:34.147",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "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"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-08-22T14:29:00.363",
  "references": [
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      "tags": [
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    },
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    },
    {
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      "tags": [
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139"
    },
    {
      "source": "secalert@redhat.com",
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    },
    {
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      "url": "https://security.netapp.com/advisory/ntap-20180814-0001/"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://usn.ubuntu.com/3738-1/"
    },
    {
      "source": "secalert@redhat.com",
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      ],
      "url": "https://www.samba.org/samba/security/CVE-2018-1139.html"
    },
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  "vulnStatus": "Modified",
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          "value": "CWE-20"
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      "source": "nvd@nist.gov",
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    }
  ]
}



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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.


Detection rules are retrieved from Rulezet.


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.