Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wolfssl | Wolfssl | <= 4.0.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2019/10/02/2Mailing ListThird Party Advisory
- https://eprint.iacr.org/2011/232.pdfTechnical DescriptionThird Party Advisory
- https://minerva.crocs.fi.muni.cz/Product
- https://tches.iacr.org/index.php/TCHES/article/view/7337Technical DescriptionThird Party Advisory
- http://www.openwall.com/lists/oss-security/2019/10/02/2Mailing ListThird Party Advisory
- https://eprint.iacr.org/2011/232.pdfTechnical DescriptionThird Party Advisory
- https://minerva.crocs.fi.muni.cz/Product
- https://tches.iacr.org/index.php/TCHES/article/view/7337Technical DescriptionThird Party Advisory
FAQ
What is CVE-2019-13628?
CVE-2019-13628 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 atta...
How severe is CVE-2019-13628?
CVE-2019-13628 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-13628?
Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.