#VU58975 Spoofing attack in PowerShell - CVE-2021-43896

Vulnerability identifier: #VU58975

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-43896

CWE-ID: CWE-451

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
PowerShell
Client/Desktop applications / Software for system administration

Vendor: Microsoft

Description

The vulnerability allows a local attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Microsoft PowerShell. A local attacker can spoof page content.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PowerShell: 7.2.0

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43896

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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.