// For flags

CVE-2020-8873

Parallels Desktop xHCI Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.2-47123. 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 xHCI component. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor. Was ZDI-CAN-10031.

Esta vulnerabilidad permite a atacantes locales escalar privilegios sobre las instalaciones afectadas de Parallels Desktop versión 15.1.2-47123. Un atacante primero debe obtener la capacidad de ejecutar código muy privilegiado sobre el sistema invitado objetivo a fin de explotar esta vulnerabilidad. El fallo específico se presenta dentro del componente xHCI. El problema resulta de la falta de un bloqueo apropiado cuando se realizan operaciones en un objeto. Un atacante puede aprovechar esta vulnerabilidad para escalar privilegios y ejecutar código en el contexto del hypervisor. Fue ZDI-CAN-10031.

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. 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 xHCI component. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.

*Credits: Reno Robert
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-02-11 CVE Reserved
  • 2020-03-13 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-269: Improper Privilege Management
  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC
References (1)
URL Tag Source
https://www.zerodayinitiative.com/advisories/ZDI-20-294 Third Party Advisory
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Parallels
Search vendor "Parallels"
 Parallels Desktop
Search vendor "Parallels" for product "Parallels Desktop"
 < 15.1.3
Search vendor "Parallels" for product "Parallels Desktop" and version " < 15.1.3"
macos
Affected