CVE-2007-1497 (GCVE-0-2007-1497)
Vulnerability from cvelistv5
Published
2007-03-16 22:00
Modified
2024-08-07 12:59
Severity ?
CWE
  • n/a
Summary
nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.
References
cve@mitre.org http://secunia.com/advisories/24492 Patch, Vendor Advisory
cve@mitre.org http://secunia.com/advisories/25228
cve@mitre.org http://secunia.com/advisories/25288
cve@mitre.org http://secunia.com/advisories/25392
cve@mitre.org http://secunia.com/advisories/25961
cve@mitre.org http://secunia.com/advisories/26620
cve@mitre.org http://www.debian.org/security/2007/dsa-1289
cve@mitre.org http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3
cve@mitre.org http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
cve@mitre.org http://www.mandriva.com/security/advisories?name=MDKSA-2007:196
cve@mitre.org http://www.novell.com/linux/security/advisories/2007_43_kernel.html
cve@mitre.org http://www.osvdb.org/33028
cve@mitre.org http://www.redhat.com/support/errata/RHSA-2007-0347.html
cve@mitre.org http://www.securityfocus.com/bid/23976
cve@mitre.org http://www.ubuntu.com/usn/usn-464-1
cve@mitre.org http://www.vupen.com/english/advisories/2007/0944
cve@mitre.org https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/24492 Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/25228
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/25288
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/25392
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/25961
af854a3a-2127-422b-91ae-364da2661108 http://secunia.com/advisories/26620
af854a3a-2127-422b-91ae-364da2661108 http://www.debian.org/security/2007/dsa-1289
af854a3a-2127-422b-91ae-364da2661108 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3
af854a3a-2127-422b-91ae-364da2661108 http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
af854a3a-2127-422b-91ae-364da2661108 http://www.mandriva.com/security/advisories?name=MDKSA-2007:196
af854a3a-2127-422b-91ae-364da2661108 http://www.novell.com/linux/security/advisories/2007_43_kernel.html
af854a3a-2127-422b-91ae-364da2661108 http://www.osvdb.org/33028
af854a3a-2127-422b-91ae-364da2661108 http://www.redhat.com/support/errata/RHSA-2007-0347.html
af854a3a-2127-422b-91ae-364da2661108 http://www.securityfocus.com/bid/23976
af854a3a-2127-422b-91ae-364da2661108 http://www.ubuntu.com/usn/usn-464-1
af854a3a-2127-422b-91ae-364da2661108 http://www.vupen.com/english/advisories/2007/0944
af854a3a-2127-422b-91ae-364da2661108 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-07T12:59:08.540Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "oval:org.mitre.oval:def:10457",
            "tags": [
              "vdb-entry",
              "signature",
              "x_refsource_OVAL",
              "x_transferred"
            ],
            "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457"
          },
          {
            "name": "RHSA-2007:0347",
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT",
              "x_transferred"
            ],
            "url": "http://www.redhat.com/support/errata/RHSA-2007-0347.html"
          },
          {
            "name": "USN-464-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "http://www.ubuntu.com/usn/usn-464-1"
          },
          {
            "name": "SUSE-SA:2007:043",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://www.novell.com/linux/security/advisories/2007_43_kernel.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3"
          },
          {
            "name": "MDKSA-2007:171",
            "tags": [
              "vendor-advisory",
              "x_refsource_MANDRIVA",
              "x_transferred"
            ],
            "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:171"
          },
          {
            "name": "ADV-2007-0944",
            "tags": [
              "vdb-entry",
              "x_refsource_VUPEN",
              "x_transferred"
            ],
            "url": "http://www.vupen.com/english/advisories/2007/0944"
          },
          {
            "name": "DSA-1289",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "http://www.debian.org/security/2007/dsa-1289"
          },
          {
            "name": "25288",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/25288"
          },
          {
            "name": "26620",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/26620"
          },
          {
            "name": "25228",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/25228"
          },
          {
            "name": "MDKSA-2007:196",
            "tags": [
              "vendor-advisory",
              "x_refsource_MANDRIVA",
              "x_transferred"
            ],
            "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:196"
          },
          {
            "name": "25961",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/25961"
          },
          {
            "name": "24492",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/24492"
          },
          {
            "name": "25392",
            "tags": [
              "third-party-advisory",
              "x_refsource_SECUNIA",
              "x_transferred"
            ],
            "url": "http://secunia.com/advisories/25392"
          },
          {
            "name": "33028",
            "tags": [
              "vdb-entry",
              "x_refsource_OSVDB",
              "x_transferred"
            ],
            "url": "http://www.osvdb.org/33028"
          },
          {
            "name": "23976",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/23976"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2007-03-14T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2017-10-10T00:57:01",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "name": "oval:org.mitre.oval:def:10457",
          "tags": [
            "vdb-entry",
            "signature",
            "x_refsource_OVAL"
          ],
          "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457"
        },
        {
          "name": "RHSA-2007:0347",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "http://www.redhat.com/support/errata/RHSA-2007-0347.html"
        },
        {
          "name": "USN-464-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "http://www.ubuntu.com/usn/usn-464-1"
        },
        {
          "name": "SUSE-SA:2007:043",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://www.novell.com/linux/security/advisories/2007_43_kernel.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3"
        },
        {
          "name": "MDKSA-2007:171",
          "tags": [
            "vendor-advisory",
            "x_refsource_MANDRIVA"
          ],
          "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:171"
        },
        {
          "name": "ADV-2007-0944",
          "tags": [
            "vdb-entry",
            "x_refsource_VUPEN"
          ],
          "url": "http://www.vupen.com/english/advisories/2007/0944"
        },
        {
          "name": "DSA-1289",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "http://www.debian.org/security/2007/dsa-1289"
        },
        {
          "name": "25288",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/25288"
        },
        {
          "name": "26620",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/26620"
        },
        {
          "name": "25228",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/25228"
        },
        {
          "name": "MDKSA-2007:196",
          "tags": [
            "vendor-advisory",
            "x_refsource_MANDRIVA"
          ],
          "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:196"
        },
        {
          "name": "25961",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/25961"
        },
        {
          "name": "24492",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/24492"
        },
        {
          "name": "25392",
          "tags": [
            "third-party-advisory",
            "x_refsource_SECUNIA"
          ],
          "url": "http://secunia.com/advisories/25392"
        },
        {
          "name": "33028",
          "tags": [
            "vdb-entry",
            "x_refsource_OSVDB"
          ],
          "url": "http://www.osvdb.org/33028"
        },
        {
          "name": "23976",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/23976"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2007-1497",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "oval:org.mitre.oval:def:10457",
              "refsource": "OVAL",
              "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457"
            },
            {
              "name": "RHSA-2007:0347",
              "refsource": "REDHAT",
              "url": "http://www.redhat.com/support/errata/RHSA-2007-0347.html"
            },
            {
              "name": "USN-464-1",
              "refsource": "UBUNTU",
              "url": "http://www.ubuntu.com/usn/usn-464-1"
            },
            {
              "name": "SUSE-SA:2007:043",
              "refsource": "SUSE",
              "url": "http://www.novell.com/linux/security/advisories/2007_43_kernel.html"
            },
            {
              "name": "http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3",
              "refsource": "CONFIRM",
              "url": "http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3"
            },
            {
              "name": "MDKSA-2007:171",
              "refsource": "MANDRIVA",
              "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:171"
            },
            {
              "name": "ADV-2007-0944",
              "refsource": "VUPEN",
              "url": "http://www.vupen.com/english/advisories/2007/0944"
            },
            {
              "name": "DSA-1289",
              "refsource": "DEBIAN",
              "url": "http://www.debian.org/security/2007/dsa-1289"
            },
            {
              "name": "25288",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/25288"
            },
            {
              "name": "26620",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/26620"
            },
            {
              "name": "25228",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/25228"
            },
            {
              "name": "MDKSA-2007:196",
              "refsource": "MANDRIVA",
              "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:196"
            },
            {
              "name": "25961",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/25961"
            },
            {
              "name": "24492",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/24492"
            },
            {
              "name": "25392",
              "refsource": "SECUNIA",
              "url": "http://secunia.com/advisories/25392"
            },
            {
              "name": "33028",
              "refsource": "OSVDB",
              "url": "http://www.osvdb.org/33028"
            },
            {
              "name": "23976",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/23976"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2007-1497",
    "datePublished": "2007-03-16T22:00:00",
    "dateReserved": "2007-03-16T00:00:00",
    "dateUpdated": "2024-08-07T12:59:08.540Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2007-1497\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2007-03-16T22:19:00.000\",\"lastModified\":\"2025-04-09T00:30:58.490\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.\"},{\"lang\":\"es\",\"value\":\"nf_conntrack en netfilter en el kernel de Linux anterior a 2.6.20.3 no fija nfctinfo durante el nuevo re-ensamble de paquetes fragmentados, lo cual deja el valor por defecto como IP_CT_ESTABLISHED y permitir\u00eda a atacantes remotos evitar ciertas reglas de asignaci\u00f3n utilizando fragmentos IPv6.\"}],\"metrics\":{\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.6.20.2\",\"matchCriteriaId\":\"4C23C3FF-1016-4A18-8747-832F91EDB572\"}]}]}],\"references\":[{\"url\":\"http://secunia.com/advisories/24492\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://secunia.com/advisories/25228\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/25288\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/25392\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/25961\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/26620\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.debian.org/security/2007/dsa-1289\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.mandriva.com/security/advisories?name=MDKSA-2007:171\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.mandriva.com/security/advisories?name=MDKSA-2007:196\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.novell.com/linux/security/advisories/2007_43_kernel.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.osvdb.org/33028\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.redhat.com/support/errata/RHSA-2007-0347.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securityfocus.com/bid/23976\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/usn-464-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.vupen.com/english/advisories/2007/0944\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://secunia.com/advisories/24492\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://secunia.com/advisories/25228\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://secunia.com/advisories/25288\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://secunia.com/advisories/25392\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://secunia.com/advisories/25961\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://secunia.com/advisories/26620\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.debian.org/security/2007/dsa-1289\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.mandriva.com/security/advisories?name=MDKSA-2007:171\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.mandriva.com/security/advisories?name=MDKSA-2007:196\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.novell.com/linux/security/advisories/2007_43_kernel.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.osvdb.org/33028\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.redhat.com/support/errata/RHSA-2007-0347.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.securityfocus.com/bid/23976\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.ubuntu.com/usn/usn-464-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.vupen.com/english/advisories/2007/0944\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.