CVE-2019-1739 (GCVE-0-2019-1739)

Vulnerability from cvelistv5 – Published: 2019-03-27 23:20 – Updated: 2024-09-16 20:07
VLAI
Title
Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vulnerabilities
Summary
A vulnerability in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to a parsing issue on DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.
CWE
References
URL Tags
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/bid/107597 vdb-entryx_refsource_BID
Impacted products
Vendor Product Version CPE status
Cisco Cisco IOS and Cisco IOS-XE Software Affected: 3.16.0S
Affected: 3.16.1S
Affected: 3.16.0aS
Affected: 3.16.1aS
Affected: 3.16.2S
Affected: 3.16.2aS
Affected: 3.16.0bS
Affected: 3.16.0cS
Affected: 3.16.3S
Affected: 3.16.2bS
Affected: 3.16.3aS
Affected: 3.16.4S
Affected: 3.16.4aS
Affected: 3.16.4bS
Affected: 3.16.4gS
Affected: 3.16.5S
Affected: 3.16.4cS
Affected: 3.16.4dS
Affected: 3.16.4eS
Affected: 3.16.5aS
Affected: 3.17.0S
Affected: 3.17.1S
Affected: 3.17.2S
Affected: 3.17.1aS
Affected: 3.17.3S
Affected: 3.17.4S
Affected: 3.2.0JA
Affected: 16.2.1
Affected: 16.2.2
Affected: 16.3.1
Affected: 16.3.2
Affected: 16.3.3
Affected: 16.3.1a
Affected: 16.3.4
Affected: 16.4.1
Affected: 16.4.2
Affected: 16.4.3
Affected: 16.5.1
Affected: 16.5.1a
Affected: 16.5.1b
Affected: 3.18.0aS
Affected: 3.18.0S
Affected: 3.18.1S
Affected: 3.18.2S
Affected: 3.18.3S
Affected: 3.18.4S
Affected: 3.18.0SP
Affected: 3.18.1SP
Affected: 3.18.1aSP
Affected: 3.18.1gSP
Affected: 3.18.1bSP
Affected: 3.18.1cSP
Affected: 3.18.2SP
Affected: 3.18.1hSP
Affected: 3.18.2aSP
Affected: 3.18.1iSP
guessed Create a notification for this product.
Date Public
2019-03-27 00:00
Show details on NVD website

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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to a parsing issue on DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition."
        },
        {
          "lang": "es",
          "value": "Una vulnerabilidad en la funcionalidad NBAR (Network-Based Application Recognition) de los softwares Cisco IOS y Cisco IOS XE podr\u00eda permitir que un atacante remoto no autenticado provoque que el dispositivo afectado se recargue. Esta vulnerabilidad se debe a un problema de an\u00e1lisis en los paquetes DNS. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de paquetes DNS manipulados a trav\u00e9s de routers que ejecutan una versi\u00f3n afectada y tienen NBAR habilitado. Si se explota con \u00e9xito, podr\u00eda permitir que el atacante consiga que el dispositivo afectado se reinicie, provocando una denegaci\u00f3n de servicio (DoS)."
        }
      ],
      "id": "CVE-2019-1739",
      "lastModified": "2024-11-21T04:37:14.907",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "HIGH",
            "cvssData": {
              "accessComplexity": "LOW",
              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "COMPLETE",
              "baseScore": 7.8,
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
              "version": "2.0"
            },
            "exploitabilityScore": 10.0,
            "impactScore": 6.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
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        "cvssMetricV30": [
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            "cvssData": {
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              "attackVector": "NETWORK",
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              "baseScore": 8.6,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
              "version": "3.0"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 4.0,
            "source": "ykramarz@cisco.com",
            "type": "Secondary"
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        "cvssMetricV31": [
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            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            "exploitabilityScore": 3.9,
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            "source": "nvd@nist.gov",
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      "published": "2019-03-28T00:29:00.340",
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          "source": "ykramarz@cisco.com",
          "tags": [
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            "VDB Entry"
          ],
          "url": "http://www.securityfocus.com/bid/107597"
        },
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          "tags": [
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          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-nbar"
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          "url": "http://www.securityfocus.com/bid/107597"
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          "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-nbar"
        }
      ],
      "sourceIdentifier": "ykramarz@cisco.com",
      "vulnStatus": "Modified",
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              "lang": "en",
              "value": "CWE-20"
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          "source": "ykramarz@cisco.com",
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          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
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                "negate": false,
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to a parsing issue on DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition."
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad en la funcionalidad NBAR (Network-Based Application Recognition) de los softwares Cisco IOS y Cisco IOS XE podr\u00eda permitir que un atacante remoto no autenticado provoque que el dispositivo afectado se recargue. Esta vulnerabilidad se debe a un problema de an\u00e1lisis en los paquetes DNS. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de paquetes DNS manipulados a trav\u00e9s de routers que ejecutan una versi\u00f3n afectada y tienen NBAR habilitado. Si se explota con \u00e9xito, podr\u00eda permitir que el atacante consiga que el dispositivo afectado se reinicie, provocando una denegaci\u00f3n de servicio (DoS)."
          }
        ],
        "id": "CVE-2019-1739",
        "lastModified": "2024-11-21T04:37:14.907",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 7.8,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 6.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
                "version": "3.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 4.0,
              "source": "psirt@cisco.com",
              "type": "Secondary"
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2019-03-28T00:29:00.340",
        "references": [
          {
            "source": "psirt@cisco.com",
            "tags": [
              "Broken Link",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/107597"
          },
          {
            "source": "psirt@cisco.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-nbar"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Broken Link",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/107597"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-nbar"
          }
        ],
        "sourceIdentifier": "psirt@cisco.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              }
            ],
            "source": "psirt@cisco.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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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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