CVE-2021-31728 Privilege escalation in n/a
A local attacker can exploit incorrect access control in MalwareFox drivers to achieve ring 0 code execution and elevate privileges.
- 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-2021-31728?
CVE-2021-31728 is a high-severity vulnerability in n/a, published on 17 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 allows a non-privileged process to open a handle to \.\ZemanaAntiMalware, register itself with the driver by sending IOCTL 0x80002010, allocate executable memory using a flaw in IOCTL 0x80002040, install a hook with IOCTL 0x80002044 and execute the executable memory using this hook with IOCTL 0x80002014 or 0x80002018, this exposes ring 0 code execution in the context of the driver allowing the non-privileged process to elevate privileges.
Which versions are affected by CVE-2021-31728?
It affects 1 product.
Products include Malwarefox Antimalware.
How do I fix CVE-2021-31728?
No fix has been published for CVE-2021-31728 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-31728 being exploited?
There is no known exploitation of CVE-2021-31728 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-hgc8-6w6r-m2w8.