Minerva timing attack on P-256 in python-ecdsa

高 7.4CVE-2024-23342 · GHSA-wj6h-64fc-37mp · PYSEC-2026-1325 · 23/01/2024 公開 · 17/06/2026 更新

要点

CVE-2024-23342 は ecdsa, ecdsa (tlsfuzzer) に影響する深刻度「高」 (CVSS 7.4) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.98%（全脆弱性の 62.2% より高い）。
修正版の情報はまだありません。参考情報のベンダー勧告を確認してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
ecdsa PyPI	`全バージョン`	修正版なし
ecdsa tlsfuzzer	`≤ 0.18.0`	修正版なし

概要

python-ecdsa has been found to be subject to a Minerva timing attack on the P-256 curve. Using the ecdsa.SigningKey.sign_digest() API function and timing signatures an attacker can leak the internal nonce which may allow for private key discovery. Both ECDSA signatures, key generation, and ECDH operations are affected. ECDSA signature verification is unaffected. The python-ecdsa project considers side channel attacks out of scope for the project and there is no planned fix.

NVD の説明

The `ecdsa` PyPI package is a pure Python implementation of ECC (Elliptic Curve Cryptography) with support for ECDSA (Elliptic Curve Digital Signature Algorithm), EdDSA (Edwards-curve Digital Signature Algorithm) and ECDH (Elliptic Curve Diffie-Hellman). Versions 0.18.0 and prior are vulnerable to the Minerva attack. As of time of publication, no known patched version exists.