// For flags

CVE-2022-34899

Parallels Access Agent Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability

Severity Score

7.8
*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 Access 6.5.4 (39316) Agent. An attacker must first obtain the ability to execute low-privileged code on the target host system in order to exploit this vulnerability. The specific flaw exists within the Parallels service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-16134.

Esta vulnerabilidad permite a atacantes locales escalar privilegios en las instalaciones afectadas de Parallels Access versión 6.5.4 (39316) Agent. Un atacante debe obtener primero la capacidad de ejecutar código poco privilegiado en el sistema anfitrión de destino para poder explotar esta vulnerabilidad. El fallo específico se presenta dentro del servicio de Parallels. Al crear un enlace simbólico, un atacante puede abusar del servicio para ejecutar un archivo. Un atacante puede aprovechar esta vulnerabilidad para escalar privilegios y ejecutar código arbitrario en el contexto de root. Era ZDI-CAN-16134

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Access Agent. An attacker must first obtain the ability to execute low-privileged code on the target host system in order to exploit this vulnerability.
The specific flaw exists within the Parallels service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

*Credits: Reno Robert of Trend Micro Zero Day Initiative
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-07-01 CVE Reserved
  • 2022-07-01 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC
References (2)
URL Tag Source
https://www.zerodayinitiative.com/advisories/ZDI-22-947 Third Party Advisory
URL Date SRC
URL Date SRC
URL Date SRC
https://kb.parallels.com/en/129010 2022-07-28
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 Access
Search vendor "Parallels" for product "Parallels Access"
 6.5.4_\(39316\)
Search vendor "Parallels" for product "Parallels Access" and version "6.5.4_\(39316\)"
-
Affected