CVE Catalog

CVE-2017-0247

High
Published: Translated: NVD NIST

Summary

A denial of service vulnerability exists in ASP.NET Core due to improper validation of web requests. Attackers can exploit a flaw in the TextEncoder.EncodeCore function, leading to denial of service.

Risk Assessment

The organization may experience service outages, potentially resulting in loss of customer trust and financial losses.

Recommendation

It is recommended to update ASP.NET Core to version 1.0.4 or 1.1.3 and monitor systems for unusual requests.

Related vulnerabilities

Original NVD description (English source)

A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc before 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS