CVE-2021-31957 (GCVE-0-2021-31957)
Vulnerability from cvelistv5 – Published: 2021-06-08 22:46 – Updated: 2024-08-03 23:10
VLAI
EPSS
VEX
Title
ASP.NET Core Denial of Service Vulnerability
Summary
ASP.NET Core Denial of Service Vulnerability
Severity
CWE
- Denial of Service
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
7 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:*:*:*:*:*:*:*:* |
||
| 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:*:*:*:*:*:*:*:* |
||
| 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:*:*:*:*:*:*:* |
||
| 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:*:*:*:*:*:*:*:* |
||
| 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:*:* |
||
| Microsoft | .NET Core 3.1 |
Affected:
3.1 , < 3.1.16
(custom)
cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:* |
||
| Microsoft | .NET 5.0 |
Affected:
5.0.0 , < 5.0.7
(custom)
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* |
Date Public
2021-06-08 07:00
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"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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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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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.
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.
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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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