Remote code execution in Microsoft PowerShell
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-8256 CVE-2018-8415 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system PowerShell Core Client/Desktop applications / Software for system administration |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU15866
Risk: High
CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-8256
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of user-supplied input within PowerShell files. A remote attacker can create a specially crafted PowerShell file, trick the victim into opening it and execute arbitrary code on the target system with privileges of the current user.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 1809
Windows Server: 2008 R2 - 2019 1803
PowerShell Core: 6.0.0 - 6.1
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8256
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Input validation error
EUVDB-ID: #VU15867
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-8415
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of user-supplied input within PowerShell files. A remote attacker can create a specially crafted PowerShell file, trick the victim into opening it and execute unlogged code on the target system with privileges of the current user.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 1809
Windows Server: 2008 R2 - 2019 1803
PowerShell Core: 6.0.0 - 6.1
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8415
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.
