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HIGH7.5

GHSA-w73w-5m7g-f7qc

Authorization bypass in github.com/dgrijalva/jwt-go

Quick fix

GHSA-w73w-5m7g-f7qc — github.com/dgrijalva/jwt-go/v4: upgrade to the fixed version with the command below.

go get github.com/dgrijalva/jwt-go/v4@v4.0.0-preview1

Details

jwt-go allows attackers to bypass intended access restrictions in situations with `[]string{}` for `m["aud"]` (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to [golang-jwt](https://github.com/golang-jwt/jwt) at version 3.2.1

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/dgrijalva/jwt-go
Introduced in: 0.0.0-20150717181359-44718f8a89b0

No fixed version published yet for github.com/dgrijalva/jwt-go (go modules). Pin to a known-safe version or switch to an alternative.

Go/github.com/dgrijalva/jwt-go/v4
Introduced in: 0Fixed in: 4.0.0-preview1
Fixgo get github.com/dgrijalva/jwt-go/v4@v4.0.0-preview1

References