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ASP.NET Core fails to properly validate web requests

High severity GitHub Reviewed Published Oct 16, 2018 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

nuget Microsoft.AspNetCore.Mvc (NuGet)

Affected versions

>= 1.1.0, < 1.1.3
>= 1.0.0, < 1.0.4

Patched versions

1.1.3
1.0.4
nuget Microsoft.AspNetCore.Mvc.Abstractions (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.ApiExplorer (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Core (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Cors (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.DataAnnotations (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Formatters.Json (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Formatters.Xml (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Localization (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Razor (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.Razor.Host (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.TagHelpers (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.ViewFeatures (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget Microsoft.AspNetCore.Mvc.WebApiCompatShim (NuGet)
>= 1.0.0, < 1.0.4
>= 1.1.0, < 1.1.3
1.0.4
1.1.3
nuget System.Net.Http (NuGet)
= 4.1.1
= 4.3.1
4.1.2
4.3.2
nuget System.Net.Http.WinHttpHandler (NuGet)
= 4.0.0
>= 4.3.0, < 4.5.4
4.0.1
4.5.4
nuget System.Net.Security (NuGet)
= 4.0.0
= 4.3.0
4.0.1
4.3.1
nuget System.Net.WebSockets.Client (NuGet)
= 4.0.0
= 4.3.0
4.0.1
4.3.1
nuget System.Text.Encodings.Web (NuGet)
= 4.0.0
= 4.3.0
4.0.1
4.3.1

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.

References

Published by the National Vulnerability Database May 12, 2017
Published to the GitHub Advisory Database Oct 16, 2018
Reviewed Jun 16, 2020
Last updated Feb 1, 2023

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CVE ID

CVE-2017-0247

GHSA ID

GHSA-6xh7-4v2w-36q6

Source code

No known source code
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