4.7

CVE-2019-15809

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microchip ≫ Atmel Toolbox Version 00.03.11.05
Athena-scs ≫ Idprotect Version 010b.0352.0005
Athena-scs ≫ Idprotect Version 010e.1245.0002
Athena-scs ≫ Idprotect Version 0106.0130.0401
Cryptsoft ≫ S/a Idflex V Version 010b.0352.0005
Tecsec ≫ Armored Card Version 010e.0264.0001
Tecsec ≫ Armored Card Version 108.0264.0001
Thalesgroup ≫ Etoken 4300 Version 010e.1245.0002
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.47% 0.382
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NIST 1.2 1.9 2.9
AV:L/AC:H/Au:N/C:P/I:N/A:N
CWE-203 Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

http://www.openwall.com/lists/oss-security/2019/10/02/2
Third Party Advisory
Mailing List
https://eprint.iacr.org/2011/232.pdf
Third Party Advisory
Technical Description
https://minerva.crocs.fi.muni.cz/
Third Party Advisory
Exploit
https://tches.iacr.org/index.php/TCHES/article/view/7337
Third Party Advisory
Technical Description
https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214
Third Party Advisory
US Government Resource
https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/
Product