Vulnerability-Lookup

FKIE_CVE-2011-4120

Vulnerability from fkie_nvd - Published: 2019-11-26 05:15 - Updated: 2026-06-16 23:34

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Yubico PAM Module before 2.10 performed user authentication when 'use_first_pass' PAM configuration option was not used and the module was configured as 'sufficient' in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string.

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/security/cve/cve-2011-4120	Broken Link, Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120	Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com	https://security-tracker.debian.org/tracker/CVE-2011-4120	Third Party Advisory
secalert@redhat.com	https://www.openwall.com/lists/oss-security/2011/11/07/6	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://access.redhat.com/security/cve/cve-2011-4120	Broken Link, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120	Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security-tracker.debian.org/tracker/CVE-2011-4120	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2011/11/07/6	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
yubico	pam_module	*
linux	linux_kernel	-
debian	debian_linux	8.0
debian	debian_linux	9.0
debian	debian_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "yubico-pam",
          "vendor": "yubico-pam",
          "versions": [
            {
              "status": "affected",
              "version": "before 2.10"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:yubico:pam_module:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9D79AAA1-ECB9-40CB-BD2E-9ACA5BEEA33C",
              "versionEndExcluding": "2.10",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Yubico PAM Module before 2.10 performed user authentication when \u0027use_first_pass\u0027 PAM configuration option was not used and the module was configured as \u0027sufficient\u0027 in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string."
    },
    {
      "lang": "es",
      "value": "El m\u00f3dulo PAM de Yubico versiones anteriores a 2.10, realiz\u00f3 la autenticaci\u00f3n del usuario cuando no se utiliz\u00f3 la opci\u00f3n de configuraci\u00f3n PAM \"use_first_pass\" y el m\u00f3dulo fue configurado como \"sufficient\" en la configuraci\u00f3n PAM. Un atacante remoto podr\u00eda usar este fallo para omitir el proceso de autenticaci\u00f3n com\u00fan y conseguir acceso a la cuenta en cuesti\u00f3n al proporcionar un valor NULL (presionando la secuencia de teclado Ctrl-D) como la cadena de contrase\u00f1a."
    }
  ],
  "id": "CVE-2011-4120",
  "lastModified": "2026-06-16T23:34:27.810",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-11-26T05:15:13.130",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Broken Link",
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/cve-2011-4120"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security-tracker.debian.org/tracker/CVE-2011-4120"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2011/11/07/6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link",
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/cve-2011-4120"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security-tracker.debian.org/tracker/CVE-2011-4120"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2011/11/07/6"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2011-4120 (GCVE-0-2011-4120)

Vulnerability from cvelistv5 – Published: 2019-11-26 04:17 – Updated: 2024-08-07 00:01

Summary

Severity

No CVSS data available.

CWE

Other

Assigner

redhat redhat root

References

4 references

URL	Tags
https://security-tracker.debian.org/tracker/CVE-2…	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_MISC
https://access.redhat.com/security/cve/cve-2011-4120	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2011/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
yubico-pam	yubico-pam	Affected: before 2.10

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-07T00:01:50.367Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://security-tracker.debian.org/tracker/CVE-2011-4120"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://access.redhat.com/security/cve/cve-2011-4120"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2011/11/07/6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "yubico-pam",
          "vendor": "yubico-pam",
          "versions": [
            {
              "status": "affected",
              "version": "before 2.10"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Yubico PAM Module before 2.10 performed user authentication when \u0027use_first_pass\u0027 PAM configuration option was not used and the module was configured as \u0027sufficient\u0027 in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Other",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-11-26T04:17:52.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security-tracker.debian.org/tracker/CVE-2011-4120"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://access.redhat.com/security/cve/cve-2011-4120"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2011/11/07/6"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2011-4120",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "yubico-pam",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "before 2.10"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "yubico-pam"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Yubico PAM Module before 2.10 performed user authentication when \u0027use_first_pass\u0027 PAM configuration option was not used and the module was configured as \u0027sufficient\u0027 in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Other"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://security-tracker.debian.org/tracker/CVE-2011-4120",
              "refsource": "MISC",
              "url": "https://security-tracker.debian.org/tracker/CVE-2011-4120"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120",
              "refsource": "MISC",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120"
            },
            {
              "name": "https://access.redhat.com/security/cve/cve-2011-4120",
              "refsource": "MISC",
              "url": "https://access.redhat.com/security/cve/cve-2011-4120"
            },
            {
              "name": "https://www.openwall.com/lists/oss-security/2011/11/07/6",
              "refsource": "MISC",
              "url": "https://www.openwall.com/lists/oss-security/2011/11/07/6"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2011-4120",
    "datePublished": "2019-11-26T04:17:52.000Z",
    "dateReserved": "2011-10-18T00:00:00.000Z",
    "dateUpdated": "2024-08-07T00:01:50.367Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

FKIE_CVE-2011-4120

CVE-2011-4120 (GCVE-0-2011-4120)

Tags

Sightings

Nomenclature

Related by attack behaviour