QID 980229

QID 980229: Dotnet (nuget) Security Update for Hangfire.Core (GHSA-7rq6-7gv8-c37h)

Dashboard UI in Hangfire.Core uses authorization filters to protect it from showing sensitive data to unauthorized users. By default when no custom authorization filters specified, `LocalRequestsOnlyAuthorizationFilter` filter is being used to allow only local requests and prohibit all the remote requests to provide sensible, protected by default settings.

However due to the recent changes, in version 1.7.25 no authorization filters are used by default, allowing remote requests to succeed.

Missing authorization when default options are used for the Dashboard UI, e.g. when no custom authorization rules are used as recommended in the [Using Dashboard](https://docs.hangfire.io/en/latest/configuration/using-dashboard.html#configuring-authorization) documentation article.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Patch is already available in version [1.7.26](https://github.com/HangfireIO/Hangfire/releases/tag/v1.7.26) and already available on NuGet.org, please see [Hangfire.Core 1.7.26](https://www.nuget.org/packages/Hangfire.Core/1.7.26). Default authorization rules now prohibit remote requests by default again by including the `LocalRequestsOnlyAuthorizationFilter` filter to the default settings. Please upgrade to the newest version in order to mitigate the issue.Workaround:
It is possible to fix the issue by using the `LocalRequestsOnlyAuthorizationFilter` explicitly when configuring the Dashboard UI. In this case upgrade is not required.

```csharp
// using Hangfire.Dashboard;

app.UseHangfireDashboard("/hangfire", new DashboardOptions
{
Authorization = new []{ new LocalRequestsOnlyAuthorizationFilter(); }
});
```

Vendor References

GHSA-7rq6-7gv8-c37h - github.com/advisories/GHSA-7rq6-7gv8-c37h

CVEs related to QID 980229

CVE-2021-41238 |

Software Advisories

Advisory ID	Software	Component	Link
GHSA-7rq6-7gv8-c37h	Hangfire.Core		github.com/advisories/GHSA-7rq6-7gv8-c37h

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