Microsoft ASP.NET Core 2.1/3.0/3.1 Web Request resource consumption

Summaryinfo

A vulnerability was found in Microsoft ASP.NET Core 2.1/3.0/3.1. It has been declared as problematic. This impacts an unknown function of the component Web Request Handler. Executing a manipulation can lead to resource consumption. This vulnerability is registered as CVE-2020-0602. It is possible to launch the attack remotely. No exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in Microsoft ASP.NET Core 2.1/3.0/3.1 and classified as problematic. This vulnerability affects some unknown processing of the component Web Request Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests, aka 'ASP.NET Core Denial of Service Vulnerability'.

The weakness was published 01/14/2020 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release has been coordinated with the vendor. This vulnerability was named CVE-2020-0602. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project. The advisory points out:

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication.

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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Productinfo

Vendor

• Microsoft

Name

• ASP.NET Core

Version

• 2.1
• 3.0
• 3.1

License

• open-source

Website

• Vendor: https://www.microsoft.com/

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