Information Exposure Affecting wolfssl package, versions <4.1.0+dfsg-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-DEBIAN11-WOLFSSL-518075
  • published3 Oct 2019
  • disclosed3 Oct 2019

Introduced: 3 Oct 2019

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

How to fix?

Upgrade Debian:11 wolfssl to version 4.1.0+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wolfssl package and not the wolfssl package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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