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…

PriorityP418medium4.7CVSS 3.1

AVLACHPRLUINSUCHINAN

EPSS

0.36%

28.5th percentile

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	wolfssl	< wolfssl 4.1.0+dfsg-1 (bookworm)	wolfssl 4.1.0+dfsg-1 (bookworm)
wolfssl	wolfcrypt	>= 0 < 4.1.0	4.1.0
wolfssl	wolfssl	<= 4.0.0	—
wolfssl	wolfssl	>= 0 < 4.1.0+dfsg-1	4.1.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.1.0+dfsg-1	4.1.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.1.0+dfsg-1	4.1.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.1.0+dfsg-1	4.1.0+dfsg-1

CVSS provenance

nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

nvdv2.01.2LOWAV:L/AC:H/Au:N/C:P/I:N/A:N

osv4.7MEDIUM

vendor_debian4.7MEDIUM

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