CVE-2017-4949 Use after free in Fusion
A guest VM can execute code on the host via a use-after-free in the NAT service when IPv6 is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-4949?
CVE-2017-4949 is a high-severity use after free vulnerability in Vmware Fusion, published on 11 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
VMware Workstation and Fusion contain a use-after-free vulnerability in VMware NAT service when IPv6 mode is enabled. This issue may allow a guest to execute code on the host. Note: IPv6 mode for VMNAT is not enabled by default.
Weakness: CWE-416
Which versions are affected by CVE-2017-4949?
It affects 2 products.
Products include Vmware Fusion, Vmware Workstation.
How do I fix CVE-2017-4949?
No fix has been published for CVE-2017-4949 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2017-4949 being exploited?
There is no known exploitation of CVE-2017-4949 in the wild and no public exploit code.
Other vulnerabilities in Vmware Fusion
Sources
Also known as GHSA-xp8m-46mm-88p5.