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CVE-2009-0887

Estado: ModificadaMedia (6.6)—

Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user's non-ASCII username, via a login attempt.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux-pam — Linux-pam

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-0887",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": true,
        "exploitabilityScore": 2.7,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-03-12T15:20:50.127",
  "references": [
    {
      "url": "http://openwall.com/lists/oss-security/2009/03/05/1",
      "tags": [
        "Exploit"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&amp%3Br2=1.10&amp%3Bview=patch",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/34733",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:077",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/34010",
      "tags": [
        "Patch"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/49110",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://openwall.com/lists/oss-security/2009/03/05/1",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?r1=1.9&amp%3Br2=1.10&amp%3Bview=patch",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://pam.cvs.sourceforge.net/viewvc/pam/Linux-PAM/libpam/pam_misc.c?view=log",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/34733",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:077",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/34010",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/49110",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00398.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00420.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user's non-ASCII username, via a login attempt."
    },
    {
      "lang": "es",
      "value": "Error de presencia de signo en entero en la función the_pam_StrTok en Linux-PAM (alias pam) 1.0.3 y anteriores, cuando un fichero de configuración contienen nombres de usuario con caracteres non-ASCII, podría permitir a los atacantes remoto causar una denegación de servicios, y podría permitir a usuarios remotos autenticados obtener login de acceso con un nombre de usuario diferente a los usuarios con caracteres non-ASCII, a través de un intento de login."
    }
  ],
  "lastModified": "2026-06-16T23:06:02.380",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5C8DB56B-870D-45E3-8216-ADB47FD07B2D",
              "versionEndIncluding": "1.0.3"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.1.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B59C70C7-FABE-4A45-A45D-2C7276D698DF"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DBA50D8F-D5A8-4123-93CF-E7714571F411"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.2.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DB8820C0-1ECB-45AD-A573-5667F0D09776"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5D416053-0010-4B25-9F7C-6054C51C1685"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B97AB578-0E9E-4370-8379-0CD455F2D740"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.5.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "22A6147C-CC0A-4C9F-B9A9-E144F2133592"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6DEF8EC8-0E0A-4C0A-95BE-FB7C23732083"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.6.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C9A9AB1C-FDF8-4E98-8773-387E03CD93E1"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.6.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8F94AA92-5854-46B9-8B3C-08FCC5B071CF"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.6.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FD5C0039-827C-45CD-99BE-95459006CA59"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.7.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F4256C34-DBCA-4FE0-96A5-874D7F00869A"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.7.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1B2613D2-33C1-4132-AD9A-68190A59C0F4"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.8.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "08FDE78F-119B-4FC8-BBFA-8048F2CF1227"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.8.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C4A75789-F7EC-4D9C-942A-243DF92E5CA5"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3753027E-D3A4-45D4-A3A3-2320C48AF6C6"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:0.99.10.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6533A629-6351-4831-BBF7-44718262FAF3"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:1.0.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "516F23F9-25B3-40DB-A3CA-2F1DE0678934"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:1.0.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5F3ACA7F-D247-439C-8B5E-287EC5D236AF"
            },
            {
              "criteria": "cpe:2.3:a:linux-pam:linux-pam:1.0.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6A30E5C3-501D-4DAA-B7F7-E42F98DEDBF9"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Red Hat is aware of this issue and is tracking it via the following bug:\nhttps://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-0887\n\nThe Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here: http://www.redhat.com/security/updates/classification/\n",
      "lastModified": "2009-03-13T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}