CVEvulnerability
CVE-2019-15809
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
Smart cards from the Athena SCS manufacturer, based on the Atmel Toolbox 00.03.11.05 and the AT90SC chip, contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because the Atmel Toolbox 00.03.11.05 contains two versions of ECDSA signature functions, described as fast and secure, but the affected cards chose to use the fast version, which leaks the bit length of the random nonce via timing. This affects Athena IDProtect 010b.0352.0005, Athena IDProtect 010e.1245.0002, Athena IDProtect 0106.0130.0401, Athena IDProtect 010e.1245.0002, Valid S/A IDflex V 010b.0352.0005, SafeNet eToken 4300 010e.1245.0002, TecSec Armored Card 010e.0264.0001, and TecSec Armored Card 108.0264.0001.
Affected configurations
• microchip atmel toolbox 00.03.11.05
• athena-scs idprotect 010b.0352.0005
• athena-scs idprotect 010e.1245.0002
• athena-scs idprotect 0106.0130.0401
• cryptsoft s\/a idflex v 010b.0352.0005
• tecsec armored card 010e.0264.0001
• tecsec armored card 108.0264.0001
• thalesgroup etoken 4300 010e.1245.0002
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://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214 Third Party Advisory, US Government Resource
- https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/ Exploit, Third Party Advisory
- https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory
- https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/ Product
- http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory
- https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214 Third Party Advisory, US Government Resource
- https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/ Exploit, Third Party Advisory
- https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory
- https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/ Product