CVEvulnerability
CVE-2019-13628
4.7 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2019-10-03
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.7 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 1.2 LOW — AV:L/AC:H/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-203
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.
Affected configurations
• wolfssl wolfssl (<= 4.0.0)
Related
Weakness · CWE (1)
- CWE-203 Observable Discrepancy weakness
References
- http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory
- https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/ Product
- https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory
- https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/ Product
- https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory