FKIE_CVE-2021-34724

Vulnerability from fkie_nvd - Published: 2021-09-23 03:15 - Updated: 2024-11-21 06:11
Severity ?
6.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
6.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Summary
A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileges and execute arbitrary code on the underlying operating system as the root user. An attacker must be authenticated on an affected device as a PRIV15 user. This vulnerability is due to insufficient file system protection and the presence of a sensitive file in the bootflash directory on an affected device. An attacker could exploit this vulnerability by overwriting an installer file stored in the bootflash directory with arbitrary commands that can be executed with root-level privileges. A successful exploit could allow the attacker to read and write changes to the configuration database on the affected device.
References
psirt@cisco.comhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-privesc-VP4FG3jDVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-privesc-VP4FG3jDVendor Advisory
Impacted products
Vendor Product Version
cisco ios_xe_sd-wan *
cisco 1000_integrated_services_router -
cisco 1100-4g\/6g_integrated_services_router -
cisco 1100-4p_integrated_services_router -
cisco 1100-8p_integrated_services_router -
cisco 1100_integrated_services_router -
cisco 1101-4p_integrated_services_router -
cisco 1101_integrated_services_router -
cisco 1109-2p_integrated_services_router -
cisco 1109-4p_integrated_services_router -
cisco 1109_integrated_services_router -
cisco 1111x-8p_integrated_services_router -
cisco 1111x_integrated_services_router -
cisco 111x_integrated_services_router -
cisco 1120_integrated_services_router -
cisco 1160_integrated_services_router -
cisco 4000_integrated_services_router -
cisco 422_integrated_services_router -
cisco 4221_integrated_services_router -
cisco 4321_integrated_services_router -
cisco 4331_integrated_services_router -
cisco 4351_integrated_services_router -
cisco 4431_integrated_services_router -
cisco 4451-x_integrated_services_router -
cisco 4451_integrated_services_router -
cisco 4461_integrated_services_router -
cisco asr_1000 -
cisco asr_1000-esp100 -
cisco asr_1000-x -
cisco asr_1000_series -
cisco asr_1000_series_route_processor_\(rp2\) -
cisco asr_1000_series_route_processor_\(rp3\) -
cisco asr_1001 -
cisco asr_1001-hx -
cisco asr_1001-hx_r -
cisco asr_1001-x -
cisco asr_1001-x_r -
cisco asr_1002 -
cisco asr_1002-hx -
cisco asr_1002-hx_r -
cisco asr_1002-x -
cisco asr_1002-x_r -
cisco asr_1004 -
cisco asr_1006 -
cisco asr_1006-x -
cisco asr_1009-x -
cisco asr_1013 -
cisco asr_1023 -
cisco csr_1000v -
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileges and execute arbitrary code on the underlying operating system as the root user. An attacker must be authenticated on an affected device as a PRIV15 user. This vulnerability is due to insufficient file system protection and the presence of a sensitive file in the bootflash directory on an affected device. An attacker could exploit this vulnerability by overwriting an installer file stored in the bootflash directory with arbitrary commands that can be executed with root-level privileges. A successful exploit could allow the attacker to read and write changes to the configuration database on the affected device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la CLI de Cisco IOS XE SD-WAN Software podr\u00eda permitir a un atacante local autenticado elevar los privilegios y ejecutar c\u00f3digo arbitrario en el sistema operativo subyacente como usuario root. Un atacante debe estar autenticado en un dispositivo afectado como usuario PRIV15. Esta vulnerabilidad es debido a una protecci\u00f3n insuficiente del sistema de archivos y a la presencia de un archivo confidencial en el directorio bootflash de un dispositivo afectado. Un atacante podr\u00eda explotar esta vulnerabilidad al sobrescribir un archivo de instalaci\u00f3n almacenado en el directorio bootflash con comandos arbitrarios que pueden ser ejecutados con privilegios de nivel root. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante leer y escribir cambios en la base de datos de configuraci\u00f3n del dispositivo afectado"
    }
  ],
  "id": "CVE-2021-34724",
  "lastModified": "2024-11-21T06:11:03.303",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 6.6,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:N",
          "version": "2.0"
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        "exploitabilityScore": 3.9,
        "impactScore": 9.2,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "cvssData": {
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          "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"
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        "exploitabilityScore": 0.8,
        "impactScore": 5.2,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "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"
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        "exploitabilityScore": 0.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2021-09-23T03:15:18.813",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-privesc-VP4FG3jD"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-privesc-VP4FG3jD"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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Sightings

Author Source Type Date

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.