JWT Signature Validation Flaw in Inversoft's Prime-JWT
CVE-2018-1000531
Key Information:
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What is CVE-2018-1000531?
Inversoft's Prime-JWT prior to a specific commit is vulnerable to an improper input validation issue, specifically in the JWTDecoder.decode function. This flaw allows attackers to craft a malicious JWT token using the 'none' algorithm in the header, potentially leading to incorrect signature validation. If exploited, this vulnerability permits unauthorized access or manipulation of sensitive information. It is critical for users of this library to update to a version that includes the fix implemented in commit abb0d479389a2509f939452a6767dc424bb5e6ba.
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.