CVE Vulnerability

CVE-2019-15809

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.

1.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 1.9 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

4.7 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
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://minerva.crocs.fi.muni.cz/ Exploit 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
Configurations

Configuration 1

cpe:2.3:a:microchip:atmel_toolbox:00.03.11.05:*:*:*:*:*:*:*
cpe:2.3:o:tecsec:armored_card:108.0264.0001:*:*:*:*:*:*:*
cpe:2.3:o:tecsec:armored_card:010e.0264.0001:*:*:*:*:*:*:*
cpe:2.3:o:thalesgroup:etoken_4300:010e.1245.0002:*:*:*:*:*:*:*
cpe:2.3:o:cryptsoft:s/a_idflex_v:010b.0352.0005:*:*:*:*:*:*:*
cpe:2.3:o:athena-scs:idprotect:0106.0130.0401:*:*:*:*:*:*:*
cpe:2.3:o:athena-scs:idprotect:010e.1245.0002:*:*:*:*:*:*:*
cpe:2.3:o:athena-scs:idprotect:010b.0352.0005:*:*:*:*:*:*:*
Information

Published : 2019-10-03 02:15

Updated : 2021-04-13 07:31

NVD link : CVE-2019-15809

Mitre link : CVE-2019-15809

Products Affected
No products.
CWE
CWE-203