FKIE_CVE-2020-22552

Vulnerability from fkie_nvd - Published: 2020-10-28 14:15 - Updated: 2024-11-21 05:13
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.
References
cve@mitre.orghttp://snap7.comThird Party Advisory, URL Repurposed
cve@mitre.orghttps://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/Third Party Advisory
cve@mitre.orghttps://sourceforge.net/projects/snap7/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://snap7.comThird Party Advisory, URL Repurposed
af854a3a-2127-422b-91ae-364da2661108https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://sourceforge.net/projects/snap7/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
snap7_project snap7 1.4.1
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:snap7_project:snap7:1.4.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "C87485B5-06EE-4FE4-A999-54074EFE2C74",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed."
    },
    {
      "lang": "es",
      "value": "El componente Snap7 server en versi\u00f3n 1.4.1, cuando un atacante env\u00eda un paquete dise\u00f1ado con el flag last-data-unitel del protocolo COTP establece que No y S7 escribe una funci\u00f3n var, el servidor de Snap7 se bloquear\u00e1"
    }
  ],
  "id": "CVE-2020-22552",
  "lastModified": "2024-11-21T05:13:18.460",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "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",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-10-28T14:15:12.253",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "URL Repurposed"
      ],
      "url": "http://snap7.com"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://sourceforge.net/projects/snap7/"
    },
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      "tags": [
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    {
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      "tags": [
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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.



Detection rules are retrieved from Rulezet.