Vulnerability in Wolfssl
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.
EPSS: 0.004 (28.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Wolfssl
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (Product, x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-13628?
- CVE-2019-13628 is a medium-severity vulnerability in Wolfssl, classified under Observable Discrepancy. CVSS score: 4.7/10. Published 2019-10-03.
- How severe is CVE-2019-13628?
- Medium severity. CVSS v3 base score is 4.7 out of 10.