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Critical vulnerabilities affect JSON Web Token libraries


Threatpost - (International) A Canadian security researcher discovered vulnerabilities in several JavaScript Object Notation (JSON) Web Token (JWT) libraries that could allow attackers to bypass verification steps and access servers by exploiting a public key confusion between systems signed with keyed-hash message authentication codes (HMAC) and Rivest-Shamir-Adleman (RSA) keys. The issue can be addressed by configuring servers to reject tokens with different signatures via a whitelisting or blacklisting mechanism.


Note: This news synopsis is taken from the DHS Daily Open Source Infrastructure Report, a daily [Monday through Friday, except US Federal holidays] summary of open-source published information concerning significant critical infrastructure issues; a 10-day archive of the DOSIR can be found at:

Last Updated: 27 May 2016 10:23:54