Authentication Bypass Affecting @solid/identity-token-verifier package, versions <0.5.2
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Test your applications- Snyk ID SNYK-JS-SOLIDIDENTITYTOKENVERIFIER-1085639
- published 14 Mar 2021
- disclosed 12 Mar 2021
- credit Unknown
How to fix?
Upgrade @solid/identity-token-verifier to version 0.5.2 or higher.
Overview
@solid/identity-token-verifier is a Verifies Solid access tokens via their WebID claim, and thus asserts ownership of WebIDs.
Affected versions of this package are vulnerable to Authentication Bypass. A verification flaw in the implementation of the identity token verifier library (https://github.com/solid/identity-token-verifier) allows DPoP proofs to be spoofed.
DPoP proofs are used to bind access tokens to a private key meant to be in sole possession of a specific user. Instead of verifying against the hash of an embedded public key, the library instead verifies against a field that an attacker can modify to spoof another user’s DPoP.
A stolen DPoP proof, when used in the right context, therefore allows the rebinding of a DPoP-bound access token. Any attacker in possession of a targeted access token could build an attack environment to replay it on any Pod service with this vulnerability.