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CVE-2024-1544

4.1 · MEDIUM

Generating the ECDSA nonce k samples a random number r and then truncates this randomness with a modular reduction mod n where n is the order of the elliptic curve.

Published Aug 27, 2024CWE-203EPSS 0.35%

Overview

CVE-2024-1544 is a medium-severity vulnerability. It was published on August 27, 2024 and has a CVSS 3.1 base score of 4.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

Generating the ECDSA nonce k samples a random number r and then

truncates this randomness with a modular reduction mod n where n is the

order of the elliptic curve. Meaning k = r mod n. The division used

during the reduction estimates a factor q_e by dividing the upper two

digits (a digit having e.g. a size of 8 byte) of r by the upper digit of

n and then decrements q_e in a loop until it has the correct size.

Observing the number of times q_e is decremented through a control-flow

revealing side-channel reveals a bias in the most significant bits of

k. Depending on the curve this is either a negligible bias or a

significant bias large enough to reconstruct k with lattice reduction

methods. For SECP160R1, e.g., we find a bias of 15 bits.

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

GitHubgithub.com/wolfSSL/wolfssl/pull/7020GitHubgithub.com/wolfSSL/wolfssl/releases/tag/v5.7.2-stable

How CyberStrike helps

Frequently asked questions

What is CVE-2024-1544?

CVE-2024-1544 is a medium-severity vulnerability. It was published on August 27, 2024 and has a CVSS 3.1 base score of 4.1 (MEDIUM).

How severe is CVE-2024-1544?

This vulnerability has a CVSS 3.1 base score of 4.1, 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-2024-1544?

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-2024-1544?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-1544 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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