CVE-2020-1026

CRITICAL

MSR JavaScript Cryptography Library - Info Disclosure

Title source: llm
STIX 2.1

Description

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'.

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0254
EPSS Percentile 82.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-200 CWE-347
Status published
Products (2)
microsoft/research_javascript_cryptography_library 1.4
npm/msrcrypto 0 - 1.5.8npm
Published Apr 15, 2020
Tracked Since Feb 18, 2026