#VU56979 Improper access control in Parallels Desktop - CVE-2021-34864

Vulnerability identifier: #VU56979

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34864

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Parallels Desktop
Operating systems & Components / Operating system package or component

Vendor: Parallels

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to improper access control within the WinAppHelper component, which leads to security restrictions bypass and privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Parallels Desktop: before 17

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External links
https://www.zerodayinitiative.com/advisories/ZDI-21-1000/

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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.