Incorrect Calculation in the MSR JavaScript Cryptography Library

緊急 9.8CVE-2020-1026 · GHSA-9x9j-836w-8f55 · 15/04/2020 公開 · 17/06/2026 更新

要点

CVE-2020-1026 は research javascript cryptography library (microsoft), msrcrypto に影響する深刻度「緊急」 (CVSS 9.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：2.6%（全脆弱性の 85.5% より高い）。
対処：1.5.8 以降に更新してください。

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
research javascript cryptography library microsoft	`= 1.4`	修正版なし
msrcrypto npm	`< 1.5.8`	`1.5.8`

概要

A Security Feature Bypass vulnerability exists in the MSR JavaScript Cryptography Library that is caused by multiple bugs in the library's Elliptic Curve Cryptography (ECC) implementation.An attacker could potentially abuse these bugs to learn information about a server's private ECC key (a key leakage attack) or craft an invalid ECDSA signature that nevertheless passes as valid.The security update addresses the vulnerability by fixing the bugs disclosed in the ECC implementation, aka MSR JavaScript Cryptography Library Security Feature Bypass Vulnerability.

NVD の説明

A Security Feature Bypass vulnerability exists in the MSR JavaScript Cryptography Library that is caused by multiple bugs in the libraryâ€™s Elliptic Curve Cryptography (ECC) implementation.An attacker could potentially abuse these bugs to learn information about a serverâ€™s private ECC key (a key leakage attack) or craft an invalid ECDSA signature that nevertheless passes as valid.The security update addresses the vulnerability by fixing the bugs disclosed in the ECC implementation, aka 'MSR JavaScript Cryptography Library Security Feature Bypass Vulnerability'.