#VU52518 Heap-based buffer overflow in Parallels Desktop - CVE-2021-31428

Vulnerability identifier: #VU52518

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-31428

CWE-ID: CWE-122

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the IDE virtual device. A local administrator can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Parallels Desktop: before 16.5.0

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External links
https://www.zerodayinitiative.com/advisories/ZDI-21-436/
https://kb.parallels.com/en/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.