medium4.7
CVE-2019-13628
wolfCrypt leaks cryptographic information via timing side channel
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | wolfcrypt | <= 4.0.0 | 4.1.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Wolfssl | Wolfssl | through 4.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- http://www.openwall.com/lists/oss-security/2019/10/02/2
- https://eprint.iacr.org/2011/232.pdf
- https://minerva.crocs.fi.muni.cz/
- https://tches.iacr.org/index.php/TCHES/article/view/7337
- https://github.com/advisories/GHSA-q95h-vc86-hv77
- https://nvd.nist.gov/vuln/detail/CVE-2019-13628