What is the CVSS score of CVE-2021-31421?

CVE-2021-31421 has a CVSS 3.1 base score of 6.0 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N. EPSS exploitation probability: 0.4%.

Parallels Desktop CVE-2021-31421

MEDIUM

Path Traversal (CWE-22)

2021-04-29 zdi-disclosures@trendmicro.com

Path Traversal Parallels Desktop

6.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.0 MEDIUM

AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Apr 29, 2021 - 17:15 nvd

MEDIUM 6.0

DescriptionNVD

This vulnerability allows local attackers to delete arbitrary files on affected installations of Parallels Desktop 16.1.1-49141. 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 Toolgate component. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to delete arbitrary files in the context of the hypervisor. Was ZDI-CAN-12129.

AnalysisAI

This vulnerability allows local attackers to delete arbitrary files on affected installations of Parallels Desktop 16.1.1-49141. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. This vulnerability allows local attackers to delete arbitrary files on affected installations of Parallels Desktop 16.1.1-49141. 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 Toolgate component. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to delete arbitrary files in the context of the hypervisor. Was ZDI-CAN-12129. Affected products include: Parallels Parallels Desktop.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.