CVE-2021-34986: Parallels Desktop Service Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.0 (49183). An attacker must first obtain the ability to execute low-privileged code on the target 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-13932.
Other sources
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. An attacker must first obtain the ability to execute low-privileged code on the target 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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-34986?
CVE-2021-34986 is a vulnerability that allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.0 (49183).
How can an attacker exploit CVE-2021-34986?
An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
What is the affected software?
The affected software is Parallels Desktop 16.5.0 (49183).
How severe is CVE-2021-34986?
CVE-2021-34986 has a severity rating of 7.8 (High).
How do I fix CVE-2021-34986?
To fix CVE-2021-34986, you should update Parallels Desktop to the latest version provided by the vendor.