CVE-2024-48948: elliptic Signature Bypass — Exploit

Description

The Elliptic package 6.5.7 for Node.js, in its for ECDSA implementation, does not correctly verify valid signatures if the hash contains at least four leading 0 bytes and when the order of the elliptic curve's base point is smaller than the hash, because of an _truncateToN anomaly. This leads to valid signatures being rejected. Legitimate transactions or communications may be incorrectly flagged as invalid.

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CVSS v3.1 Score

4.8

MEDIUM

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

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
indutny	elliptic	All

References

Exploits

https://github.com/indutny/elliptic/issues/321 https://github.com/indutny/elliptic/pull/322

Other References

https://blog.trailofbits.com/2025/11/18/we-found-cryptography-bugs-in-the-elliptic-library-using-wycheproof/ https://security.netapp.com/advisory/ntap-20241220-0004/

Frequently Asked Questions

What is CVE-2024-48948? +

The Elliptic package 6.5.7 for Node.js, in its for ECDSA implementation, does not correctly verify valid signatures if the hash contains at least four leading 0 bytes and when the order of the elliptic curve's base point is smaller than the hash, because of an _truncateToN anomaly. This leads to valid signatures being rejected. Legitimate transactions or communications may be incorrectly flagged as invalid. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2024-48948? +

CVE-2024-48948 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-48948? +

CVE-2024-48948 affects products from indutny, specifically: elliptic. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-48948? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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