CVE-2019-14317

CVSS V2 Medium 4.3 CVSS V3 Medium 5.3

Description

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.

Overview

CVE ID
CVE-2019-14317

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-12-11T18:16:18

Last Modified Date
2021-07-21T11:39:23

Weakness Enumerations

CWE	URL
CWE-331	http://cwe.mitre.org/data/definitions/331.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:wolfssl:wolfssl::::::::	1	OR		4.2.0

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
4.3

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
2.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
LOW

Availability Impact
NONE

Base Score
5.3

Base Severity
MEDIUM

Exploitability Score
3.9

Impact Score
1.4

References

Reference URL	Reference Tags
https://www.wolfssl.com/docs/security-vulnerabilities/	Patch Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2019-14317
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14317

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:09:27				Added to TrackCVE
2022-12-04 07:40:12	2019-12-11T18:16Z	2019-12-11T18:16:18	CVE Published Date	updated
2022-12-04 07:40:12		2021-07-21T11:39:23	CVE Modified Date	updated
2022-12-04 07:40:12		Analyzed	Vulnerability Status	updated