CVE-2020-1026
CRITICALMSR JavaScript Cryptography Library - Info Disclosure
Title source: llmDescription
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
Patch, Vendor Advisory x_refsource_misc
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1026
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