Timing Attack Affecting http-signature package, versions <1.0.0


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

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  • Snyk ID npm:http-signature:20150122
  • published 28 Jun 2017
  • disclosed 21 Jan 2015
  • credit Alok Menghrajani

Introduced: 21 Jan 2015

CVE NOT AVAILABLE CWE-310 Open this link in a new tab

How to fix?

Upgrade http-signature to version 1.0.0 or higher.

Overview

http-signature is a reference implementation of Joyent's HTTP Signature scheme.

Affected versions of the package are vulnerable to Timing Attacks due to time-variable comparison of signatures.

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 signature are incorrect. An attacker can use this difference to perform a timing attack, essentially allowing them to guess the signature one character at a time.

You can read more about timing attacks in Node.js on the Snyk blog.

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None