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CVE-2017-8700 — Cross-origin Resource Sharing bypass in...

HIGH

Cross-origin Resource Sharing bypass in ASP.NET Core

Published May 13, 2022Updated December 5, 2024Source: osv

Summary

ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing (CORS) configurations and retrieve normally restricted content from a web application, aka "ASP.NET Core Information Disclosure Vulnerability".

Advisory Timeline

  • First published May 13, 2022 (1613 days ago).
  • Last revised December 5, 2024 — 937 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update Microsoft.AspNetCore.Mvc.Cors to 1.1.6 or later
dotnet add package Microsoft.AspNetCore.Mvc.Cors --version 1.1.6
NuGet
Update Microsoft.AspNetCore.Mvc.Core to 1.0.6 or later
dotnet add package Microsoft.AspNetCore.Mvc.Core --version 1.0.6
NuGet
Update Microsoft.AspNetCore.Mvc.Core to 1.1.6 or later
dotnet add package Microsoft.AspNetCore.Mvc.Core --version 1.1.6
NuGet
Update Microsoft.AspNetCore.Mvc.Cors to 1.0.6 or later
dotnet add package Microsoft.AspNetCore.Mvc.Cors --version 1.0.6

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (4)

Affects 1 ecosystem: nuget (2).

PackageEcosystemAffectedFixed In
Microsoft.AspNetCore.Mvc.Cors
nuget
1.1.0, 1.1.1, 1.1.2, 1.1.3 (+2 more)1.1.6
Microsoft.AspNetCore.Mvc.Core
nuget
1.0.0, 1.0.1, 1.0.2, 1.0.3 (+2 more)1.0.6
Microsoft.AspNetCore.Mvc.Core
nuget
1.1.0, 1.1.1, 1.1.2, 1.1.3 (+2 more)1.1.6
Microsoft.AspNetCore.Mvc.Cors
nuget
1.0.0, 1.0.1, 1.0.2, 1.0.3 (+2 more)1.0.6

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2017-8700?
Cross-origin Resource Sharing bypass in ASP.NET Core This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2017-8700?
CVE-2017-8700 affects Microsoft.AspNetCore.Mvc.Cors and Microsoft.AspNetCore.Mvc.Core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2017-8700 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-3rp6-rjw4-cq39

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