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CVE-2019-13628

4.7 · MEDIUM

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation.

Published Oct 3, 2019CWE-203EPSS 0.36%

Overview

CVE-2019-13628 is a medium-severity vulnerability. It was published on October 3, 2019 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2019/10/02/2Refeprint.iacr.org/2011/232.pdfRefminerva.crocs.fi.muni.cz/Reftches.iacr.org/index.php/TCHES/article/view/7337Refwww.openwall.com/lists/oss-security/2019/10/02/2Refeprint.iacr.org/2011/232.pdfRefminerva.crocs.fi.muni.cz/Reftches.iacr.org/index.php/TCHES/article/view/7337

How CyberStrike helps

Frequently asked questions

What is CVE-2019-13628?

CVE-2019-13628 is a medium-severity vulnerability. It was published on October 3, 2019 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2019-13628?

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-13628?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-13628?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-13628 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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