CVE-2017-8335 (GCVE-0-2017-8335)

Vulnerability from cvelistv5 – Published: 2019-06-18 18:27 – Updated: 2024-08-05 16:34
VLAI
Summary
An issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of setting name for wireless network. These values are stored by the device in NVRAM (Non-volatile RAM). It seems that the POST parameters passed in this request to set up names on the device do not have a string length check on them. This allows an attacker to send a large payload in the "mssid_1" POST parameter. The device also allows a user to view the name of the Wifi Network set by the user. While processing this request, the device calls a function named "getCfgToHTML" at address 0x004268A8 which retrieves the value set earlier by "mssid_1" parameter as SSID2 and this value then results in overflowing the stack set up for this function and allows an attacker to control $ra register value on the stack which allows an attacker to control the device by executing a payload of an attacker's choice. If the firmware version AL-R096 is dissected using binwalk tool, we obtain a cpio-root archive which contains the filesystem set up on the device that contains all the binaries. The binary "goahead" is the one that has the vulnerable function that recieves the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows a MIPS little endian format. The function sub_00420F38 in IDA pro is identified to be receiving the values sent in the POST parameter "mssid_1" at address 0x0042BA00 and then sets in the NVRAM at address 0x0042C314. The value is later retrieved in the function "getCfgToHTML" at address 0x00426924 and this results in overflowing the buffer due to "strcat" function that is utilized by this function.
Severity
8.0 (High)
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 29/100 over 2193 records in the last 180 days details
References
Date Public
2019-06-07 00:00
Show details on NVD website
To clipboard 

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          {
            "lang": "es",
            "value": "Se descubri\u00f3 un problema en los dispositivos Securifi Almond, Almond + y Almond 2015 con firmware AL-R096. El dispositivo proporciona al usuario la capacidad de configurar el nombre de la red inal\u00e1mbrica. Estos valores son almacenados por el dispositivo en NVRAM (RAM no vol\u00e1til). Parece que los par\u00e1metros POST pasados en esta solicitud para configurar nombres en el dispositivo no tienen una verificaci\u00f3n de longitud de cadena en ellos. Esto permite que un atacante env\u00ede una gran carga \u00fatil en el par\u00e1metro POST \"mssid_1\". El dispositivo tambi\u00e9n permite que un usuario vea el nombre de la red Wifi configurada por el usuario. Mientras procesa esta solicitud, el dispositivo llama a una funci\u00f3n llamada \"getCfgToHTML\" en la direcci\u00f3n 0x004268A8 que recupera el valor establecido anteriormente por el par\u00e1metro \"mssid_1\" como SSID2 y este valor produce un desbordamiento de la configuraci\u00f3n de pila para esta funci\u00f3n y permite que un atacante controle Valor de registro de $ra en la pila que permite a un atacante controlar el dispositivo ejecutando una carga \u00fatil a elecci\u00f3n del atacante. Si la versi\u00f3n de firmware AL-R096 se disecciona con la herramienta binwalk, obtenemos un archivo cpio-root que contiene el sistema de archivos configurado en el dispositivo que contiene todos los archivos binarios. El binario \"goahead\" es el que tiene la funci\u00f3n vulnerable que recibe los valores enviados por la solicitud POST. Si abrimos este binario en IDA-pro, notaremos que esto sigue un formato MIPS little endian. La funci\u00f3n sub_00420F38 en IDA pro est\u00e1 identificada para recibir los valores enviados en el par\u00e1metro POST \"mssid_1\" en la direcci\u00f3n 0x0042BA00 y luego se establece en la NVRAM en la direcci\u00f3n 0x0042C314. El valor se recupera posteriormente en la funci\u00f3n \"getCfgToHTML\" en la direcci\u00f3n 0x00426924 y esto provoca el desbordamiento del b\u00fafer debido a la funci\u00f3n \"strcat\" que utiliza esta funci\u00f3n."
          }
        ],
        "id": "CVE-2017-8335",
        "lastModified": "2024-11-21T03:33:47.250",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 6.0,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 6.8,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.0,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.0"
              },
              "exploitabilityScore": 2.1,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2019-06-18T19:15:10.763",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/153227/Securifi-Almond-2015-Buffer-Overflow-Command-Injection-XSS-CSRF.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Securifi_Almond_plus_sec_issues.pdf"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://seclists.org/bugtraq/2019/Jun/8"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/153227/Securifi-Almond-2015-Buffer-Overflow-Command-Injection-XSS-CSRF.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Securifi_Almond_plus_sec_issues.pdf"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://seclists.org/bugtraq/2019/Jun/8"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-119"
              }
            ],
            "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

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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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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