CVE-2019-14317
First published: Wed Dec 11 2019(Updated: )
wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces. This allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack. The issue occurs because dsa.c fixes two bits of the generated nonces.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| WolfSSL wolfssl | <4.2.0 |
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Reference Links
Frequently Asked Questions
What is CVE-2019-14317?
CVE-2019-14317 is a vulnerability in wolfSSL and wolfCrypt 4.1.0 and earlier that allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack.
How does CVE-2019-14317 occur?
CVE-2019-14317 occurs because dsa.c fixes two bits of the generated nonces, resulting in biased DSA nonces.
What is the severity of CVE-2019-14317?
The severity of CVE-2019-14317 is medium with a CVSS score of 5.3.
Which software versions are affected by CVE-2019-14317?
wolfSSL and wolfCrypt versions 4.1.0 and earlier (formerly known as CyaSSL) are affected by CVE-2019-14317 up to version 4.2.0 (exclusive).
How can CVE-2019-14317 be fixed?
To fix CVE-2019-14317, upgrade to version 4.2.0 or later of wolfSSL and wolfCrypt.
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