Security Feature Bypass in Microsoft MSR JavaScript Cryptography Library
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-1026 |
| CWE-ID | CWE-254 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
MSR JavaScript Cryptography Library Universal components / Libraries / Libraries used by multiple products |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Security Features
EUVDB-ID: #VU26887
Risk: High
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-1026
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThis vulnerability allows a local user to bypass security rescritions feature.
The vulnerability exists in the MSR JavaScript Cryptography Library due to multiple bugs in the library’s Elliptic Curve Cryptography (ECC) implementation. A remote attacker can gain information about a server’s private ECC key (a key leakage attack) or craft an invalid ECDSA signature that nevertheless passes as valid.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMSR JavaScript Cryptography Library: All versions
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1026
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
