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CVE-2020-3503 (GCVE-0-2020-3503)

Vulnerability from cvelistv5 – Published: 2020-09-24 17:51 – Updated: 2024-11-13 17:59
VLAI
Title
Cisco IOS XE Software Guest Shell Unauthorized File System Access Vulnerability
Summary
A vulnerability in the file system permissions of Cisco IOS XE Software could allow an authenticated, local attacker to obtain read and write access to critical configuration or system files. The vulnerability is due to insufficient file system permissions on an affected device. An attacker could exploit this vulnerability by connecting to an affected device's guest shell, and accessing or modifying restricted files. A successful exploit could allow the attacker to view or modify restricted information or configurations that are normally not accessible to system administrators.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-13 17:17 UTC
CWE
References
URL Tags
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version CPE status
Cisco Cisco IOS XE Software Affected: n/a
guessed Create a notification for this product.
Date Public
2020-09-24 00:00
Show details on NVD website

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              "operator": "OR"
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          ],
          "operator": "AND"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the file system permissions of Cisco IOS XE Software could allow an authenticated, local attacker to obtain read and write access to critical configuration or system files. The vulnerability is due to insufficient file system permissions on an affected device. An attacker could exploit this vulnerability by connecting to an affected device\u0027s guest shell, and accessing or modifying restricted files. A successful exploit could allow the attacker to view or modify restricted information or configurations that are normally not accessible to system administrators."
        },
        {
          "lang": "es",
          "value": "Una vulnerabilidad en los permisos del sistema de archivos de Cisco IOS XE Software, podr\u00eda permitir a un atacante local autenticado conseguir acceso de lectura y escritura a la configuraci\u00f3n cr\u00edtica o archivos del sistema.\u0026#xa0;La vulnerabilidad es debido a permisos insuficientes del sistema de archivos en un dispositivo afectado.\u0026#xa0;Un atacante podr\u00eda explotar esta vulnerabilidad mediante la conexi\u00f3n al shell invitado de un dispositivo afectado y accediendo o modificando archivos restringidos.\u0026#xa0;Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante visualizar o modificar informaci\u00f3n restringida o configuraciones que normalmente no son accesibles para los administradores del sistema."
        }
      ],
      "id": "CVE-2020-3503",
      "lastModified": "2024-12-19T13:52:35.190",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "LOW",
            "cvssData": {
              "accessComplexity": "LOW",
              "accessVector": "LOCAL",
              "authentication": "NONE",
              "availabilityImpact": "NONE",
              "baseScore": 3.6,
              "confidentialityImpact": "PARTIAL",
              "integrityImpact": "PARTIAL",
              "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 4.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
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        "cvssMetricV31": [
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 6.0,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            },
            "exploitabilityScore": 0.8,
            "impactScore": 5.2,
            "source": "ykramarz@cisco.com",
            "type": "Secondary"
          },
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 6.0,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
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              "privilegesRequired": "HIGH",
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              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
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            "exploitabilityScore": 0.8,
            "impactScore": 5.2,
            "source": "nvd@nist.gov",
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      },
      "published": "2020-09-24T18:15:20.887",
      "references": [
        {
          "source": "ykramarz@cisco.com",
          "tags": [
            "Vendor Advisory"
          ],
          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-unauth-file-access-eBTWkKVW"
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        "cveId": "CVE-2020-3503",
        "datePublished": "2020-09-24T17:51:57.058Z",
        "dateReserved": "2019-12-12T00:00:00.000Z",
        "dateUpdated": "2024-11-13T17:59:54.374Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Tags
Taxonomy of the tags.


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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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Detection rules are retrieved from Rulezet.

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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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