Vulnerability Details : CVE-2019-15809
Potential 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.
Products affected by CVE-2019-15809
- cpe:2.3:a:microchip:atmel_toolbox:00.03.11.05:*:*:*:*:*:*:*
- cpe:2.3:o:tecsec:armored_card:010e.0264.0001:*:*:*:*:*:*:*
- cpe:2.3:o:tecsec:armored_card:108.0264.0001:*:*:*:*:*:*:*
- 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:athena-scs:idprotect:0106.0130.0401:*:*:*:*:*:*:*
- cpe:2.3:o:thalesgroup:etoken_4300:010e.1245.0002:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-15809
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-15809
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
1.2
|
LOW | AV:L/AC:H/Au:N/C:P/I:N/A:N |
1.9
|
2.9
|
NIST | |
|
4.7
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.0
|
3.6
|
NIST |
CWE ids for CVE-2019-15809
-
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-15809
-
https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/details?source=ECDSA&number=214
Details - Cryptographic Algorithm Validation Program | CSRCThird Party Advisory;US Government Resource
-
http://www.openwall.com/lists/oss-security/2019/10/02/2
oss-security - Minerva: ECDSA key recovery from bit-length leakageMailing List;Third Party Advisory
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https://eprint.iacr.org/2011/232.pdf
Technical Description;Third Party Advisory
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https://www.ssi.gouv.fr/certification_cc/bibliotheque-cryptographique-atmel-toolbox-00-03-11-05/
Bibliothèque cryptographique ATMEL Toolbox 00.03.11.05 | Agence nationale de la sécurité des systèmes d'informationProduct
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https://tches.iacr.org/index.php/TCHES/article/view/7337
Return of the Hidden Number Problem. | IACR Transactions on Cryptographic Hardware and Embedded SystemsTechnical Description;Third Party Advisory
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https://minerva.crocs.fi.muni.cz/
Minerva: The curse of ECDSA noncesExploit;Third Party Advisory
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