CVE-2007-2243 (GCVE-0-2007-2243)

Vulnerability from cvelistv5 – Published: 2007-04-25 16:00 – Updated: 2024-08-07 13:33
VLAI
Summary
OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Severity
No CVSS data available.
CWE
  • n/a
References
URL Tags
http://lists.grok.org.uk/pipermail/full-disclosur… mailing-listx_refsource_FULLDISC
http://www.securityfocus.com/bid/23601 vdb-entryx_refsource_BID
http://securityreason.com/securityalert/2631 third-party-advisoryx_refsource_SREASON
http://www.osvdb.org/34600 vdb-entryx_refsource_OSVDB
https://exchange.xforce.ibmcloud.com/vulnerabilit… vdb-entryx_refsource_XF
http://lists.grok.org.uk/pipermail/full-disclosur… mailing-listx_refsource_FULLDISC
https://security.netapp.com/advisory/ntap-2019110… x_refsource_CONFIRM
Date Public
2007-04-21 00:00
Show details on NVD website

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                    "matchCriteriaId": "7279E1EC-DEBC-4ACC-925D-06A7697C162F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.3:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7910598E-BEC1-4644-9DE4-D8BE505A4F9E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.3p1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FB416D0C-6C86-450F-8917-D4B1BD82AB1E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.3p2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3640CCC9-EC4A-44A4-B747-7BAAAD3460C7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.4:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B2DD362E-9EA9-4E88-9A94-D7B471EB1FD4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.4p1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E3094069-AC2E-43BD-8094-D48E2526DECC",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.5:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9B72CFB3-39C7-469C-AA59-69F5B8993BF7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:openbsd:openssh:4.6:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2A7154C4-8325-4495-92B1-B7897CD7303E",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483."
          },
          {
            "lang": "es",
            "value": "OpenSSH 4.6 y anteriores, cuando ChallengeResponseAuthentication est\u00e1 habilitado, permite a atacantes remotos determinar la existencia de cuentas de usuario intentando autenticarse mediante S/KEY, lo cual muestra una respuesta diferente si la cuenta de usuario existe, un problema similar a CVE-2001-1483."
          }
        ],
        "id": "CVE-2007-2243",
        "lastModified": "2026-04-23T00:35:47.467",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2007-04-25T16:19:00.000",
        "references": [
          {
            "source": "cve@mitre.org",
            "url": "http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://securityreason.com/securityalert/2631"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.osvdb.org/34600"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/bid/23601"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/33794"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://security.netapp.com/advisory/ntap-20191107-0003/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://securityreason.com/securityalert/2631"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.osvdb.org/34600"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/bid/23601"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/33794"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://security.netapp.com/advisory/ntap-20191107-0003/"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vendorComments": [
          {
            "comment": "Not vulnerable. OpenSSH supplied with Red Hat Enterprise Linux 2.1, 3, 4, and 5 does not contain S/KEY support.",
            "lastModified": "2007-05-23T00:00:00",
            "organization": "Red Hat"
          }
        ],
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-287"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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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.

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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.


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