CVE-2021-41238

Missing Authorization with Default Settings in Dashboard UI

Description

Hangfire is an open source system to perform background job processing in a .NET or .NET Core applications. No Windows Service or separate process required. 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. If you are using `UseHangfireDashboard` method with default `DashboardOptions.Authorization` property value, then your installation is impacted. If any other authorization filter is specified in the `DashboardOptions.Authorization` property, the you are not impacted. Patched versions (1.7.26) are available both on Nuget.org and as a tagged release on the github repo. 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. For users who are unable to upgrade it is possible to mitigate the issue by using the `LocalRequestsOnlyAuthorizationFilter` explicitly when configuring the Dashboard UI.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.28%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: HangfireIO Hangfire
Published at:
Updated at:

References

Link Tags
https://github.com/HangfireIO/Hangfire/security/advisories/GHSA-7rq6-7gv8-c37h third party advisory
https://github.com/HangfireIO/Hangfire/issues/1958 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-41238?
CVE-2021-41238 has been scored as a high severity vulnerability.
How to fix CVE-2021-41238?
To fix CVE-2021-41238, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41238 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41238 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41238?
CVE-2021-41238 affects HangfireIO Hangfire.
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