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'jwt-simple' is a JSON Web Token encode and decode module. Affected versions of this package are vulnerable to an Authentication Bypass attack, due to the "algorithm" not being enforced. Attackers are given the opportunity to choose the algorithm sent to the server and generate signatures with arbitrary contents. The server expects an asymmetric key (RSA) but is sent a symmetric key (HMAC-SHA) with RSA's public key, so instead of going through a key validation process, the server will think the public key is actually an HMAC private key. References: https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/ https://github.com/hokaccha/node-jwt-simple/pull/14 https://github.com/hokaccha/node-jwt-simple/pull/16 https://github.com/hokaccha/node-jwt-simple/commit/957957cfa44474049b4603b293569588ee9ffd97
Created nodejs-jwt-simple tracking bugs for this issue: Affects: fedora-all [bug 1390496] Affects: epel-all [bug 1390497]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.