CVE-2019-19963 : An issue was discovered in wolfSSL before 4.3.0 in a non-default configuration w

An issue was discovered in wolfSSL before 4.3.0 in a non-default configuration where DSA is enabled. DSA signing uses the BEEA algorithm during modular inversion of the nonce, leading to a side-channel attack against the nonce.

Published 2019-12-25 00:15:11

Updated 2020-01-02 19:48:35

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2019-19963

Wolfssl » Wolfssl
Versions before (<) 4.3.0
cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2019-19963

EPSS FAQ

0.07%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 29 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-19963

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:P/I:N/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

References for CVE-2019-19963

https://github.com/wolfSSL/wolfssl/commit/7e391f0fd57f2ef375b1174d752a56ce34b2b190

Merge pull request #2629 from SparkiDev/dsa_blinding · wolfSSL/wolfssl@7e391f0 · GitHub
Patch;Third Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable

Release wolfSSL release version 4.3.0 · wolfSSL/wolfssl · GitHub
Release Notes;Third Party Advisory

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Vulnerability Details : CVE-2019-19963

Products affected by CVE-2019-19963

Exploit prediction scoring system (EPSS) score for CVE-2019-19963

CVSS scores for CVE-2019-19963

References for CVE-2019-19963