Elliptic Cryptanalysis vulnerability when `k` has leading zeros_CVE-2025-14505

5.6 / 10

MEDIUM

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

Description

The ECDSA implementation of the Elliptic package generates incorrect signatures if an interim value of 'k' (as computed based on step 3.2 of RFC 6979 https://datatracker.ietf.org/doc/html/rfc6979 ) has leading zeros and is susceptible to cryptanalysis, which can lead to secret key exposure. This happens, because the byte-length of 'k' is incorrectly computed, resulting in its getting truncated during the computation. Legitimate transactions or communications will be broken as a result. Furthermore, due to the nature of the fault, attackers could–under certain conditions–derive the secret key, if they could get their hands on both a faulty signature generated by a vulnerable version of Elliptic and a correct signature for the same inputs.

This issue affects all known versions of Elliptic (at the time of writing, versions less than or equal to 6.6.1).

Basic Information

ID CVE-2025-14505

Source HeroDevs

Published Jan 8, 2026 at 21:05

Modified Jan 8, 2026 at 21:22

Affected Product

Vendor N/A

Product Elliptic

Version <=6.6.1

Affected Versions N/A Elliptic <=6.6.1

CWE Classification

CWE-1240

References

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    "published": "2026-01-08T21:05:14.800Z",
    "modified": "2026-01-08T21:22:55.144Z",
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    "references": "https://www.herodevs.com/vulnerability-directory/cve-2025-14505\nhttps://github.com/indutny/elliptic/issues/321",
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