Vulnerability · Published Apr 15, 2020 · Assigned by microsoft
CVE-2020-1026
Critical 9.8
In plain English
A critical-severity security flaw in Microsoft Research JavaScript Cryptography Library V1.4 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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'.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | msrcrypto | 1.5.8 | GHSA-9x9j-836w-8f55 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Research JavaScript Cryptography Library V1.4 | unspecified |