CVE-2019-13628
wolfCrypt leaks cryptographic information via timing side channel
4.7
MEDIUM
CVSS 3.1
EPSS 0.14%
Description
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.
How to fix CVE-2019-13628
To remediate CVE-2019-13628, upgrade the affected package to a fixed version below.
- —upgrade to 4.1.0+dfsg-1 or later
- —upgrade to 4.1.0 or later
Is CVE-2019-13628 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.1.0+dfsg-1
- from 0, < 4.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |