Vulnerability identifier: #VU13791

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8319

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MSR JavaScript Cryptography Library
Universal components / Libraries / Libraries used by multiple products

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists in MSR JavaScript Cryptography Library due to incorrect arithmetic computations. A remote unauthenticated attacker can craft a signature, without the need of the corresponding key, and mimic the entity associated with the public/private key pair to bypass security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MSR JavaScript Cryptography Library: All versions

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8319

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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.