Denial of service in Microsoft PowerShell Core

Published: 2018-03-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-0875
Exploitation vector Network
Public exploit N/A
Vulnerable software
PowerShell Core
Client/Desktop applications / Software for system administration

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU11030

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0875

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No


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

The weakness exists in the way that .NET Core handles specially crafted requests. A remote attacker can send a small number of specially crafted requests to an .NET Core web application, trigger a hash collision and cause performance to degrade significantly enough to cause service crash.


Install updates from vendor's website.

Vulnerable software versions

PowerShell Core: 6.0.0

External links

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.