GSD-2018-3953

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the 'start_lltd' function. Within the 'start_lltd' function, a 'nvram_get' call is used to obtain the value of the user-controlled 'machine_name' NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.
Aliases
Aliases
CVE-2018-3953
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{
  "GSD": {
    "alias": "CVE-2018-3953",
    "description": "Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the \u0027Router Name\u0027 input field through the web portal is submitted to apply.cgi as the value to the \u0027machine_name\u0027 POST parameter. When the \u0027preinit\u0027 binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the \u0027start_lltd\u0027 function. Within the \u0027start_lltd\u0027 function, a \u0027nvram_get\u0027 call is used to obtain the value of the user-controlled \u0027machine_name\u0027 NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.",
    "id": "GSD-2018-3953"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-3953"
      ],
      "details": "Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the \u0027Router Name\u0027 input field through the web portal is submitted to apply.cgi as the value to the \u0027machine_name\u0027 POST parameter. When the \u0027preinit\u0027 binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the \u0027start_lltd\u0027 function. Within the \u0027start_lltd\u0027 function, a \u0027nvram_get\u0027 call is used to obtain the value of the user-controlled \u0027machine_name\u0027 NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed.",
      "id": "GSD-2018-3953",
      "modified": "2023-12-13T01:22:43.204001Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "talos-cna@cisco.com",
        "DATE_PUBLIC": "2018-10-16T00:00:00",
        "ID": "CVE-2018-3953",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "ESeries E1200",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Firmware Version 2.0.09"
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "ESeries E2500",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Firmware Version 3.0.04"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linksys"
            }
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      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the \u0027Router Name\u0027 input field through the web portal is submitted to apply.cgi as the value to the \u0027machine_name\u0027 POST parameter. When the \u0027preinit\u0027 binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the \u0027start_lltd\u0027 function. Within the \u0027start_lltd\u0027 function, a \u0027nvram_get\u0027 call is used to obtain the value of the user-controlled \u0027machine_name\u0027 NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed."
          }
        ]
      },
      "impact": {
        "cvss": {
          "baseScore": 7.2,
          "baseSeverity": "High",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "OS Command Injection"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625",
            "refsource": "MISC",
            "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:h:linksys:e1200:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
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                "operator": "OR"
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            ],
            "cpe_match": [],
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          {
            "children": [
              {
                "children": [],
                "cpe_match": [
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                    "cpe23Uri": "cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:h:linksys:e2500:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
                  }
                ],
                "operator": "OR"
              }
            ],
            "cpe_match": [],
            "operator": "AND"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "talos-cna@cisco.com",
          "ID": "CVE-2018-3953"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the \u0027Router Name\u0027 input field through the web portal is submitted to apply.cgi as the value to the \u0027machine_name\u0027 POST parameter. When the \u0027preinit\u0027 binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the \u0027start_lltd\u0027 function. Within the \u0027start_lltd\u0027 function, a \u0027nvram_get\u0027 call is used to obtain the value of the user-controlled \u0027machine_name\u0027 NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-78"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 9.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.2,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-04-26T18:52Z",
      "publishedDate": "2018-10-17T02:29Z"
    }
  }
}


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