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CVE-2019-14317

Good to know:

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Date: December 11, 2019

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.

Language: C

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2019-14317
https://security-tracker.debian.org/tracker/CVE-2019-14317
https://www.wolfssl.com/docs/security-vulnerabilities/
https://www.mend.io/vulnerability-database/CVE-2019-14317

Severity Score

Weakness Type (CWE)

Insufficient Entropy

CWE-331

Missing Encryption of Sensitive Data

CWE-311

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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