CVE-2019-13628 Information

Description

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 Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

http://www.openwall.com/lists/oss-security/2019/10/02/2 https://eprint.iacr.org/2011/232.pdf https://minerva.crocs.fi.muni.cz/ https://tches.iacr.org/index.php/TCHES/article/view/7337

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

4.7