FKIE_CVE-2018-16851

Vulnerability from fkie_nvd - Published: 2018-11-28 14:29 - Updated: 2024-11-21 03:53
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.
References
secalert@redhat.comhttp://www.securityfocus.com/bid/106027Third Party Advisory, VDB Entry
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2018/12/msg00005.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202003-52Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20181127-0001/Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3827-1/Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/3827-2/Third Party Advisory
secalert@redhat.comhttps://www.debian.org/security/2018/dsa-4345Third Party Advisory
secalert@redhat.comhttps://www.samba.org/samba/security/CVE-2018-16851.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/106027Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2018/12/msg00005.htmlMailing List, 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-20181127-0001/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3827-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3827-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2018/dsa-4345Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.samba.org/samba/security/CVE-2018-16851.htmlPatch, Vendor Advisory
Impacted products
Vendor Product Version
samba samba *
samba samba *
samba samba *
canonical ubuntu_linux 12.04
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 18.10
debian debian_linux 8.0
debian debian_linux 9.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "matchCriteriaId": "429202A8-61B3-400C-838E-91DE3CC66273",
              "versionEndExcluding": "4.7.12",
              "versionStartIncluding": "4.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
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              "versionStartIncluding": "4.8.0",
              "vulnerable": true
            },
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              "versionEndExcluding": "4.9.3",
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          "operator": "OR"
        }
      ]
    },
    {
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba\u0027s AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service."
    },
    {
      "lang": "es",
      "value": "Samba, desde la versi\u00f3n 4.0.0 antes de las versiones 4.7.12, 4.8.7 y 4.9.3, es vulnerable a una denegaci\u00f3n de servicio (DoS). Durante el procesamiento de una b\u00fasqueda LDAP antes de que el AD DC de Samba devuelva las entradas LDAP al cliente, las entradas se cachean en un \u00fanico objeto de memoria con un tama\u00f1o m\u00e1ximo de 256 MB. Cuando se alcanza este tama\u00f1o, el proceso de Samba que proporciona el servicio LDAP seguir\u00e1 el puntero NULL, terminando el proceso. No hay m\u00e1s vulnerabilidades asociadas a este problema, simplemente una denegaci\u00f3n de servicio (DoS)."
    }
  ],
  "id": "CVE-2018-16851",
  "lastModified": "2024-11-21T03:53:26.740",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
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          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "secalert@redhat.com",
        "type": "Secondary"
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    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "source": "nvd@nist.gov",
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  "published": "2018-11-28T14:29:00.423",
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-476"
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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.