CVE-2016-10555 Information

Description

Since \algorithm\ isn’t enforced in jwt.decode()in jwt-simple 0.3.0 and earlier a malicious user could choose what algorithm is sent sent to the server. If the server is expecting RSA but is sent HMAC-SHA with RSA’s public key the server will think the public key is actually an HMAC private key. This could be used to forge any data an attacker wants.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Reference

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://nodesecurity.io/advisories/87

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5