Medium severity · published Dec 25, 2019
CVE-2019-19963
An issue was discovered in wolfSSL before 4.3.0 in a non-default configuration where DSA is enabled
5.3
CVSS
1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
Wolfssl · Wolfssl
before 4.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19963
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19963
Patch
https://github.com/wolfSSL/wolfssl/commit/7e391f0fd57f2ef375b1174d752a56ce34b2b190
Release Notes
https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable
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