Timing Attack Affecting gree/jose package, versions <2.2.1
Snyk CVSS
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Test your applications- Snyk ID SNYK-PHP-GREEJOSE-70395
- published 20 Dec 2017
- disclosed 31 Mar 2015
- credit Unknown
How to fix?
Upgrade gree/jose to version 2.2.1 or higher.
Overview
Affected versions of gree/jose are vulnerable to Timing Attack.
The library implemented a character to character comparison, similar to the built-in string comparison mechanism, ===, and not a time constant string comparison. As a result, the comparison will fail faster when the first characters in the encryption key are incorrect.
An attacker can use this difference to perform a timing attack, essentially allowing them to guess the encryption key one character at a time.
You can read more about timing attacks in Node.js on the Snyk blog.