FKIE_CVE-2020-3477

Vulnerability from fkie_nvd - Published: 2020-09-24 18:15 - Updated: 2026-06-17 03:18
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by using a specific command at the command line. A successful exploit could allow the attacker to obtain read-only access to files that are located on the flash: filesystem that otherwise might not have been accessible.
References
psirt@cisco.comhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-info-disclosure-V4BmJBNFVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-info-disclosure-V4BmJBNFVendor Advisory
Impacted products
Vendor Product Version
cisco ios 16.3.11
cisco 2610xm -
cisco 2611xm -
cisco 2612 -
cisco 2620xm -
cisco 2621xm -
cisco 2650xm -
cisco 2651xm -
cisco 2691 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Cisco IOS",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:16.3.11:*:*:*:*:*:*:*",
              "matchCriteriaId": "AAA3919B-5067-4451-9109-3A52C380BCAA",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:cisco:2610xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "9E9B9F16-2D70-4109-999F-6A10D82DD68D",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2611xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "F77581A8-F334-445E-978C-D57F5135830B",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2612:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E22D6ADA-DC1D-4916-9039-D0970727DE46",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2620xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "0CF86B51-A53D-4B3A-89B6-BFF3D40397B6",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2621xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "83F5E77F-E325-472B-AD80-98B2C2DBF0AB",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2650xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E997D0D5-5436-4E39-8032-F6EA5DA45340",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2651xm:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "EF18B92D-D063-4D98-8D59-5AF02443DC4E",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:cisco:2691:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "5F4063DC-7653-4777-B012-C49CCDD0E0B5",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by using a specific command at the command line. A successful exploit could allow the attacker to obtain read-only access to files that are located on the flash: filesystem that otherwise might not have been accessible."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en el analizador de la CLI de Cisco IOS Software y Cisco IOS XE Software, podr\u00eda permitir a un atacante local autenticado acceder a archivos desde la flash: filesystem.\u0026#xa0;La vulnerabilidad es debido a una aplicaci\u00f3n insuficiente de restricciones durante la ejecuci\u00f3n de un comando espec\u00edfico.\u0026#xa0;Un atacante podr\u00eda explotar esta vulnerabilidad mediante el uso de un comando espec\u00edfico en la l\u00ednea de comandos.\u0026#xa0;Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante conseguir acceso de solo lectura a archivos que est\u00e1n ubicados en la flash: filesystem que de otro modo no podr\u00eda haber sido accesible."
    }
  ],
  "id": "CVE-2020-3477",
  "lastModified": "2026-06-17T03:18:22.767",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-3477",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-11-13T17:23:19.644914Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2020-09-24T18:15:19.917",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-info-disclosure-V4BmJBNF"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-info-disclosure-V4BmJBNF"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.