ZDI-21-433: Parallels Desktop Tools Integer Overflow Privilege Escalation Vulnerability
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 Tools component. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel on the target guest system.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Parallels Desktop for Mac |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of ZDI-21-433?
The severity of ZDI-21-433 is high due to its ability to allow local privilege escalation.
How do I fix ZDI-21-433?
To fix ZDI-21-433, update Parallels Desktop to the latest version provided by Parallels.
Who is affected by ZDI-21-433?
ZDI-21-433 affects users of Parallels Desktop for Mac.
Can ZDI-21-433 be exploited remotely?
No, ZDI-21-433 requires local access to exploit the privilege escalation vulnerability.
What should I do if I can't update due to ZDI-21-433?
If unable to update, limit local user access to the affected system and monitor for unusual activity.
- agent/references
- agent/type
- agent/softwarecombine
- agent/title
- agent/weakness
- agent/severity
- agent/event
- agent/description
- agent/source
- agent/tags
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-21-433
- alias/ZDI-CAN-12791
- alias/CVE-2021-31426
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/parallels
- canonical/parallels desktop for mac