Vulnerability Monitor

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CVE-2019-13628

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Published

2019-10-03T14:15:11.057

Last Modified

2024-11-21T04:25:23.910

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.7 (MEDIUM)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: HIGH
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

1.9

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	wolfssl	wolfssl	≤ 4.0.0	Yes

References

http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory ([email protected])
https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory ([email protected])
https://minerva.crocs.fi.muni.cz/ Product ([email protected])
https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2019/10/02/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://eprint.iacr.org/2011/232.pdf Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://minerva.crocs.fi.muni.cz/ Product (af854a3a-2127-422b-91ae-364da2661108)
https://tches.iacr.org/index.php/TCHES/article/view/7337 Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)