Timing Attack Affecting github.com/xlzd/gotp package, versions *


0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

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  • Snyk ID SNYK-GOLANG-GITHUBCOMXLZDGOTP-2329719
  • published 5 Jan 2022
  • disclosed 5 Jan 2022
  • credit codewinch

How to fix?

There is no fixed version for github.com/xlzd/gotp.

Overview

github.com/xlzd/gotp is a Golang package for generating and verifying one-time passwords. It can be used to implement two-factor (2FA) or multi-factor (MFA) authentication methods in anywhere that requires users to log in.

Affected versions of this package are vulnerable to Timing Attack if the time that the user enabled OTP (one time password) can be guessed. This vulnerability exists due to the usage of weak RNG (random number generator) by rand.Seed(time.Now().UnixNano()) method in the RandomSecret function.