Microsoft ASP.NET Core/Visual Studio denial of service

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Microsoft ASP.NET Core and Visual Studio (Programming Tool Software) (unknown version). This issue affects an unknown code block. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. Impacted is availability.

The weakness was disclosed 01/12/2021 as confirmed security guidance (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The identification of this vulnerability is CVE-2021-1723. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/13/2021). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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CVSSv3infoedit

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔒
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Timelineinfoedit

01/12/2021 Advisory disclosed
01/12/2021 +0 days Countermeasure disclosed
01/13/2021 +0 days VulDB entry created
01/13/2021 +0 days VulDB last update

Sourcesinfoedit

Vendor: https://www.microsoft.com/

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-1723 (🔒)

Entryinfoedit

Created: 01/13/2021 06:52 AM
Changes: (17) software_type vulnerability_cvss2_vuldb_av vulnerability_cvss2_vuldb_ac vulnerability_cvss2_vuldb_au vulnerability_cvss2_vuldb_ci vulnerability_cvss2_vuldb_ii vulnerability_cvss2_vuldb_ai vulnerability_cvss2_vuldb_e vulnerability_cvss2_vuldb_rl vulnerability_cvss3_vendor_basescore vulnerability_cvss2_vuldb_basescore vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_basescore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore exploit_price_0day
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