User Enumeration Affecting wolfssl/wolfssl package, versions [,4.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-UNMANAGED-WOLFSSLWOLFSSL-2369437
  • published26 Jan 2022
  • disclosed3 Oct 2019
  • creditUnknown

Introduced: 3 Oct 2019

CVE-2019-13628  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade wolfssl/wolfssl to version 4.0 or higher.

Overview

Affected versions of this package are vulnerable to User Enumeration wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

CVSS Scores

version 3.1