CVE-2021-31957 (GCVE-0-2021-31957)

Vulnerability from cvelistv5 – Published: 2021-06-08 22:46 – Updated: 2024-08-03 23:10
VLAI
Title
ASP.NET Core Denial of Service Vulnerability
Summary
ASP.NET Core Denial of Service Vulnerability
CWE
  • Denial of Service
References
Impacted products
Vendor Product Version CPE status
Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) Affected: 16.0 , < 16.4.23 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
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Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) Affected: 16.0.0 , < 16.7.16 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
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Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) Affected: 15.0.0 , < 16.9.7 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*
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Microsoft Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9) Affected: 16.10.0 , < 16.10.1 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
Create a notification for this product.
Microsoft Visual Studio 2019 for Mac version 8.10 Affected: 8.1.0 , < 8.10.1 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*
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Microsoft .NET Core 3.1 Affected: 3.1 , < 3.1.16 (custom)
    cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*
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Microsoft .NET 5.0 Affected: 5.0.0 , < 5.0.7 (custom)
    cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
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Date Public
2021-06-08 07:00
Show details on NVD website

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                "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": "Secondary"
            }
          ]
        },
        "published": "2021-06-08T23:15:08.870",
        "references": [
          {
            "source": "secure@microsoft.com",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4PRVVLXXQEF4SEJOBV3VRJHGX7YHY2CG/"
          },
          {
            "source": "secure@microsoft.com",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVCDYIP4A6DDRT7G6P3ZW6PKNK2DNWJ2/"
          },
          {
            "source": "secure@microsoft.com",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PMHWHRRYDHKM6BIINW5V7OCSW4SDWB4W/"
          },
          {
            "source": "secure@microsoft.com",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMAO4NG2OQ4PCXUQWMNSCMYWLIJJY6UY/"
          },
          {
            "source": "secure@microsoft.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31957"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4PRVVLXXQEF4SEJOBV3VRJHGX7YHY2CG/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVCDYIP4A6DDRT7G6P3ZW6PKNK2DNWJ2/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PMHWHRRYDHKM6BIINW5V7OCSW4SDWB4W/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMAO4NG2OQ4PCXUQWMNSCMYWLIJJY6UY/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31957"
          }
        ],
        "sourceIdentifier": "secure@microsoft.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T16:14:28+00:00",
      "cve": "CVE-2021-31957",
      "id": "CVE-2021-31957",
      "initial_release_date": "2021-06-08T17:35:00+00:00",
      "product_status:fixed": "112",
      "product_status:known_not_affected": "10",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dotnet: ASP.NET Core Client Disconnect Denial of Service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-31957.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2025-07-08T00:15:19Z",
      "cve": "CVE-2021-31957",
      "id": "CVE-2021-31957",
      "initial_release_date": "2023-10-31T02:25:42Z",
      "product_status:recommended": "19",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-31957",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-31957.json",
      "version": "8"
    }
  }
}



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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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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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