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CVE-2016-2126 (GCVE-0-2016-2126)

Vulnerability from cvelistv5 – Published: 2017-05-11 14:01 – Updated: 2024-08-05 23:17
VLAI
Summary
Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
URL Tags
https://www.samba.org/samba/security/CVE-2016-2126.html x_refsource_CONFIRM
http://www.securitytracker.com/id/1037495 vdb-entryx_refsource_SECTRACK
http://rhn.redhat.com/errata/RHSA-2017-0495.html vendor-advisoryx_refsource_REDHAT
http://rhn.redhat.com/errata/RHSA-2017-0494.html vendor-advisoryx_refsource_REDHAT
https://kb.pulsesecure.net/articles/Pulse_Securit… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:1265 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/94994 vdb-entryx_refsource_BID
http://rhn.redhat.com/errata/RHSA-2017-0744.html vendor-advisoryx_refsource_REDHAT
http://rhn.redhat.com/errata/RHSA-2017-0662.html vendor-advisoryx_refsource_REDHAT
Date Public
2016-12-19 00:00
Show details on NVD website
To clipboard 

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        },
        "published": "2017-05-11T14:29:58.077",
        "references": [
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0494.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0495.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0662.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0744.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/94994"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1037495"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2017:1265"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.samba.org/samba/security/CVE-2016-2126.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0494.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0495.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0662.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0744.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/94994"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1037495"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2017:1265"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.samba.org/samba/security/CVE-2016-2126.html"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-264"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-05-13T01:50:45+00:00",
      "cve": "CVE-2016-2126",
      "id": "CVE-2016-2126",
      "initial_release_date": "2016-12-19T00:00:00+00:00",
      "product_status:fixed": "2126",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "samba: Flaws in Kerberos PAC validation can trigger privilege elevation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-2126.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:20:24Z",
      "cve": "CVE-2016-2126",
      "id": "CVE-2016-2126",
      "initial_release_date": "2023-02-15T05:06:31Z",
      "product_status:known_affected": "411",
      "product_status:known_not_affected": "709",
      "product_status:recommended": "4193",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-2126",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-2126.json",
      "version": "41"
    }
  }
}



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Tags
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.