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Microsoft Identity Model Extensions Token Signing Verification Advisory (3214296)

Information

Severity

Severity

High

Family

Family

Windows

CVSSv2 Base

CVSSv2 Base

7.2

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

5 years ago

Summary

This host is missing an important security update according to Microsoft advisory (3214296).

Insight

Insight

The flaw is due to tokens signed with symmetric keys could be vulnerable to tampering. If a token signed with a symmetric key is used to verify the identity of a user, and the app makes decisions based on the verified identity of that user, then the app could make incorrect decisions.

Affected Software

Affected Software

Microsoft.IdentityModel.Tokens package version 5.1.0 on Microsoft .NET Core or .NET Framework project.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Upgrade to Microsoft.IdentityModel.Tokens version 5.1.1 or later. Please see the references for more info.