CVE-2019-15809
CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:H/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
5.3%
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
| Vendor | Product | Version | CPE |
|---|---|---|---|
| microchip | atmel_toolbox | 00.03.11.05 | cpe:2.3:a:microchip:atmel_toolbox:00.03.11.05:*:*:*:*:*:*:* |
| athena-scs | idprotect | 010b.0352.0005 | cpe:2.3:o:athena-scs:idprotect:010b.0352.0005:*:*:*:*:*:*:* |
| athena-scs | idprotect | 010e.1245.0002 | cpe:2.3:o:athena-scs:idprotect:010e.1245.0002:*:*:*:*:*:*:* |
| athena-scs | idprotect | 0106.0130.0401 | cpe:2.3:o:athena-scs:idprotect:0106.0130.0401:*:*:*:*:*:*:* |
| cryptsoft | s\/a_idflex_v | 010b.0352.0005 | cpe:2.3:o:cryptsoft:s\/a_idflex_v:010b.0352.0005:*:*:*:*:*:*:* |
| tecsec | armored_card | 010e.0264.0001 | cpe:2.3:o:tecsec:armored_card:010e.0264.0001:*:*:*:*:*:*:* |
| tecsec | armored_card | 108.0264.0001 | cpe:2.3:o:tecsec:armored_card:108.0264.0001:*:*:*:*:*:*:* |
| thalesgroup | etoken_4300 | 010e.1245.0002 | cpe:2.3:o:thalesgroup:etoken_4300:010e.1245.0002:*:*:*:*:*:*:* |
References
www.openwall.com/lists/oss-security/2019/10/02/2
csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214
eprint.iacr.org/2011/232.pdf
minerva.crocs.fi.muni.cz/
tches.iacr.org/index.php/TCHES/article/view/7337
www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/
Related
CVSS2
Attack Vector
LOCAL
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:H/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
5.3%