VULNERABILITY INTELLIGENCE
CVE-2019-13628
CVSS score4.7 MEDIUM
EPSS probability0.38%
CISA KEVNot currently listed
Published2019-10-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
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.
Weakness classification
- nvd@nist.gov: CWE-203
Primary references
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Technical Description, Third Party Advisory
- cve@mitre.org — Product
- cve@mitre.org — Technical Description, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Product
- af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Third Party Advisory