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CVE-2019-19963

MEDIUMCVSS 5.3/10EPSS 0.95%

Last modified

CVE-2019-19963 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
5.3/10

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

EPSS Probability
0.95%

56.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
WolfsslWolfssl< 4.3.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-19963?
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.
How severe is CVE-2019-19963?
CVE-2019-19963 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.
How do I fix CVE-2019-19963?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19963?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST