CVE-2019-14317: wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces. This allows a remote attacker to compute the long term private…

PriorityP429medium5.3CVSS 3.1

AVNACLPRNUINSUCLINAN

EPSS

1.75%

75.4th percentile

wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces. This allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack. The issue occurs because dsa.c fixes two bits of the generated nonces.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	wolfssl	< wolfssl 4.2.0+dfsg-1 (bookworm)	wolfssl 4.2.0+dfsg-1 (bookworm)
wolfssl	wolfssl	< 4.2.0	4.2.0
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N

osv5.3MEDIUM

vendor_debian5.3MEDIUM

vendor_redhat4.7MEDIUM

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