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.

CVSS v3.0 4.7 MEDIUM
CVSS v2.0 1.2 LOW

4.7^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / 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

1.2^/10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:L/AC:H/Au:N/C:P/I:N/A:N

Exploitability : 1.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity HIGH

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

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 (hide)

cpe:2.3:a:microchip:atmel_toolbox:00.03.11.05:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:tecsec:armored_card:010e.0264.0001:::::::*
	cpe:2.3:o:cryptsoft:s\/a_idflex_v:010b.0352.0005:::::::*
	cpe:2.3:o:athena-scs:idprotect:010e.1245.0002:::::::*
	cpe:2.3:o:athena-scs:idprotect:010b.0352.0005:::::::*
	cpe:2.3:o:tecsec:armored_card:108.0264.0001:::::::*
	cpe:2.3:o:thalesgroup:etoken_4300:010e.1245.0002:::::::*
	cpe:2.3:o:athena-scs:idprotect:0106.0130.0401:::::::*

Information

Published : 2019-10-03 07:15

Updated : 2021-04-13 12:31

NVD link : CVE-2019-15809

Mitre link : CVE-2019-15809

JSON object : View

CWE

CWE-203

Observable Discrepancy

Products Affected

thalesgroup

etoken_4300

athena-scs

idprotect

cryptsoft

s\/a_idflex_v

microchip

atmel_toolbox

tecsec

armored_card

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tches.iacr.org/index.php/TCHES/article/view/7337", "name": "https://tches.iacr.org/index.php/TCHES/article/view/7337", "tags": ["Technical Description", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/", "name": "https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/", "tags": ["Product"], "refsource": "MISC"}, {"url": "http://www.openwall.com/lists/oss-security/2019/10/02/2", "name": "[oss-security] 20191002 Minerva: ECDSA key recovery from bit-length leakage", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://minerva.crocs.fi.muni.cz/", "name": "https://minerva.crocs.fi.muni.cz/", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214", "name": "https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214", "tags": ["Third Party Advisory", "US Government Resource"], "refsource": "MISC"}, {"url": "https://eprint.iacr.org/2011/232.pdf", "name": "https://eprint.iacr.org/2011/232.pdf", "tags": ["Technical Description", "Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-203"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-15809", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 1.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:H/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "HIGH", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "severity": "LOW", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 1.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.0}}, "publishedDate": "2019-10-03T14:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:microchip:atmel_toolbox:00.03.11.05:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:tecsec:armored_card:010e.0264.0001:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:cryptsoft:s\\/a_idflex_v:010b.0352.0005:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:athena-scs:idprotect:010e.1245.0002:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:athena-scs:idprotect:010b.0352.0005:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:tecsec:armored_card:108.0264.0001:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:thalesgroup:etoken_4300:010e.1245.0002:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:athena-scs:idprotect:0106.0130.0401:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-04-13T19:31Z"}

4.7 /10

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

1.2 /10

Access Vector LOCAL

Access Complexity HIGH

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

JSON object

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1.2^/10

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