Vulnerability-Lookup

FKIE_CVE-2020-16843

Vulnerability from fkie_nvd - Published: 2020-08-04 20:15 - Updated: 2026-06-17 02:58

Severity

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.

References

URL	Tags
cve@mitre.org	http://www.openwall.com/lists/oss-security/2020/08/13/1	Mailing List, Third Party Advisory
cve@mitre.org	https://github.com/firecracker-microvm/firecracker/issues/2057	Mitigation, Third Party Advisory
cve@mitre.org	https://www.openwall.com/lists/oss-security/2020/08/13/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2020/08/13/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/firecracker-microvm/firecracker/issues/2057	Mitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2020/08/13/1	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
amazon	firecracker	0.20.0
amazon	firecracker	0.21.0
amazon	firecracker	0.21.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:amazon:firecracker:0.20.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "2596FA38-A71A-4CFF-8F3A-943A5E7DDBBA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:amazon:firecracker:0.21.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7BC5BDF-70BF-4E81-B0AC-FC94F0AFC8BB",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:amazon:firecracker:0.21.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "E005C187-CEFB-420B-B1B7-1320B8F6D10E",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered."
    },
    {
      "lang": "es",
      "value": "En Firecracker versiones 0.20.x anteriores a 0.20.1 y versiones 0.21.x anteriores a 0.21.2, la pila de red puede congelarse bajo tr\u00e1fico de entrada pesado. Esto puede resultar en una denegaci\u00f3n de servicio en el microVM cuando es configurado con una \u00fanica interfaz de red, y un problema de disponibilidad para la interfaz de red de microVM en la cual el  problema es desencadenado"
    }
  ],
  "id": "CVE-2020-16843",
  "lastModified": "2026-06-17T02:58:07.547",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-08-04T20:15:12.430",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2020/08/13/1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://github.com/firecracker-microvm/firecracker/issues/2057"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2020/08/13/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2020/08/13/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "url": "https://github.com/firecracker-microvm/firecracker/issues/2057"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2020/08/13/1"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-16843 (GCVE-0-2020-16843)

Vulnerability from cvelistv5 – Published: 2020-08-04 19:39 – Updated: 2024-08-04 13:45

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2349 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/firecracker-microvm/firecracke…	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2020/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2020/08/13/1	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T13:45:33.240Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
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              "x_transferred"
            ],
            "url": "https://github.com/firecracker-microvm/firecracker/issues/2057"
          },
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2020/08/13/1"
          },
          {
            "name": "[oss-security] 20200813 CVE-2020-16843: Firecracker v0.20.0, v0.21.0 and v0.21.1 network stack can freeze under heavy ingress traffic",
            "tags": [
              "mailing-list",
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              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/08/13/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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      "descriptions": [
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        }
      ],
      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2020-08-13T14:06:12.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
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          "url": "https://github.com/firecracker-microvm/firecracker/issues/2057"
        },
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            "x_refsource_MISC"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2020/08/13/1"
        },
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          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/08/13/1"
        }
      ],
      "x_legacyV4Record": {
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          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-16843",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
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                      "version": {
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                          {
                            "version_value": "n/a"
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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.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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