CVE-2021-41238 — HIGH (8.6)

Vulnerability 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.

CVSS Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Hangfire	Hangfire	1.7.25

Related Weaknesses (CWE)

CWE-862

References

https://github.com/HangfireIO/Hangfire/issues/1958Third Party Advisory
https://github.com/HangfireIO/Hangfire/security/advisories/GHSA-7rq6-7gv8-c37hThird Party Advisory
https://github.com/HangfireIO/Hangfire/issues/1958Third Party Advisory
https://github.com/HangfireIO/Hangfire/security/advisories/GHSA-7rq6-7gv8-c37hThird Party Advisory

FAQ

What is CVE-2021-41238?

CVE-2021-41238 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 authoriz...

How severe is CVE-2021-41238?

CVE-2021-41238 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-41238?

Check the references section above for vendor advisories and patch information. Affected products include: Hangfire Hangfire.