Vulnerability identifier: #VU15487

Vulnerability risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-8584

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to improper access control в Data Sharing Service (dssvc.dll). A local attacker can abuse a new Windows service not checking permissions again, delete OS files or DLLs, replace them with malicious versions and crash the operating system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10 1809

Windows Server: 2016 - 2019

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External links
http://twitter.com/SandboxEscaper/status/1054744201244692485
http://github.com/SandboxEscaper/randomrepo/blob/master/DeleteBug1.rar
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8584

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.