CVE-2021-34857 Memory corruption in Desktop
Local attackers with guest code execution can exploit a buffer overflow in Parallels Desktop to execute arbitrary code in the hypervisor context.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34857?
CVE-2021-34857 is a high-severity memory corruption vulnerability in Parallels Parallels Desktop, published on 25 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). 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 user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13601.
Weakness: CWE-787
Which versions are affected by CVE-2021-34857?
It affects 1 product.
Products include Parallels Parallels Desktop.
How do I fix CVE-2021-34857?
No fix has been published for CVE-2021-34857 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-34857 being exploited?
There is no known exploitation of CVE-2021-34857 in the wild and no public exploit code.
Other vulnerabilities in Parallels Parallels Desktop
Sources
Also known as GHSA-xq5h-r69f-qf3r.