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CVE-2021-31428

8.2 · HIGH

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.5-47309.

Published Apr 29, 2021CWE-122EPSS 0.44%

Overview

CVE-2021-31428 is a high-severity vulnerability. It was published on April 29, 2021 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.5-47309. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the IDE virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13186.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refkb.parallels.com/en/125013Refwww.zerodayinitiative.com/advisories/ZDI-21-436/Refkb.parallels.com/en/125013Refwww.zerodayinitiative.com/advisories/ZDI-21-436/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-31428?

CVE-2021-31428 is a high-severity vulnerability. It was published on April 29, 2021 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2021-31428?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-31428?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-31428?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-31428 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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