Vulnerability record · CVE-2017-0247 · published 12 May 2017
CVE-2017-0247: Microsoft asp.net model view controller improper input validation vulnerability
Microsoft · Asp.Net Model View Controller
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.
Description
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
18 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| https://github.com/aspnet/Announcements/issues/239 | Technical DescriptionThird Party Advisory |
| https://technet.microsoft.com/en-us/library/security/4021279.aspx | PatchVendor Advisory |
| https://www.sidertia.com/Home/Community/Blog/2017/05/18/ASPNET-Core-Unicode-Non-Char-Encoding-DoS | ExploitThird Party Advisory |
| https://github.com/aspnet/Announcements/issues/239 | Technical DescriptionThird Party Advisory |
| https://technet.microsoft.com/en-us/library/security/4021279.aspx | PatchVendor Advisory |
| https://www.sidertia.com/Home/Community/Blog/2017/05/18/ASPNET-Core-Unicode-Non-Char-Encoding-DoS | ExploitThird Party Advisory |
Track CVE-2017-0247 inside VULONE
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Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
Source: NIST National Vulnerability Database (record CVE-2017-0247), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.