CVE-2021-31421 : This vulnerability allows local attackers to delete arbitrary files on affected

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.

Published 2021-04-29 17:15:09

Updated 2021-05-10 13:55:57

Source Zero Day Initiative

View at NVD, CVE.org

Vulnerability category: Directory traversal

Products affected by CVE-2021-31421

Parallels » Parallels Desktop » Version: 16.1.1-49141
cpe:2.3:a:parallels:parallels_desktop:16.1.1-49141:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-31421

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 14 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31421

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:P/A:N	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
3.2	LOW	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N	1.5	1.4	Zero Day Initiative
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Changed Confidentiality: None Integrity: Low Availability: None
6.0	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N	1.5	4.0	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Changed Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2021-31421

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Assigned by: zdi-disclosures@trendmicro.com (Primary)

References for CVE-2021-31421

https://www.zerodayinitiative.com/advisories/ZDI-21-425/

ZDI-21-425 | Zero Day Initiative
Third Party Advisory;VDB Entry
https://kb.parallels.com/en/125013

Parallels Desktop Security Updates
Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-31421

Products affected by CVE-2021-31421

Exploit prediction scoring system (EPSS) score for CVE-2021-31421

CVSS scores for CVE-2021-31421

CWE ids for CVE-2021-31421

References for CVE-2021-31421