CVE-2017-0247
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.
- Score
- CVSS 3.0 7.5 High
- Status
- Modified - secure@microsoft.com
- Published
- 2017-05-12
- Last modified
- 2024-08-05
- Weaknesses
- CWE-20
Affected products
- Asp.net Model View Controller (Microsoft)
- Microsoft.aspnetcore.mvc.abstractions (Microsoft)
- Microsoft.aspnetcore.mvc.apiexplorer (Microsoft)
- Microsoft.aspnetcore.mvc.cors (Microsoft)
- Microsoft.aspnetcore.mvc.dataannotations (Microsoft)
- Microsoft.aspnetcore.mvc.formatters.json (Microsoft)
- Microsoft.aspnetcore.mvc.formatters.xml (Microsoft)
- Microsoft.aspnetcore.mvc.localization (Microsoft)
- Microsoft.aspnetcore.mvc.razor (Microsoft)
- Microsoft.aspnetcore.mvc.razor.host (Microsoft)
- Microsoft.aspnetcore.mvc.taghelpers (Microsoft)
- Microsoft.aspnetcore.mvc.viewfeatures (Microsoft)
- Microsoft.aspnetcore.mvc.webapicompatshim (Microsoft)
- System.net.http (Microsoft)
- System.net.http.winhttphandler (Microsoft)
- System.net.security (Microsoft)
- System.net.websockets.client (Microsoft)
- System.text.encodings.web (Microsoft)
- Asp.net Core (Microsoft Corporation)
References
- https://github.com/aspnet/Announcements/issues/239
- https://technet.microsoft.com/en-us/library/security/4021279.aspx
- https://www.sidertia.com/Home/Community/Blog/2017/05/18/ASPNET-Core-Unicode-Non-Char-Encoding-DoS
