#VU55532 Information disclosure in Parallels Desktop - CVE-2021-34855

Vulnerability identifier: #VU55532

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34855

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

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

Vendor: Parallels

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the lack of proper initialization of memory within the Toolgate component. A local user can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Parallels Desktop: before 16.5.1

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External links
https://www.zerodayinitiative.com/advisories/ZDI-21-939/
https://kb.parallels.com/125013

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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.