CVE-2021-31727 Missing authorization in n/a
A local attacker can exploit missing access controls in the MalwareFox driver to overwrite the boot sector or pagefile, achieving privilege escalation.
- 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-2021-31727?
CVE-2021-31727 is a high-severity missing authorization 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 where IOCTL's 0x80002014, 0x80002018 expose unrestricted disk read/write capabilities respectively. A non-privileged process can open a handle to \.\ZemanaAntiMalware, register with the driver using IOCTL 0x80002010 and send these IOCTL's to escalate privileges by overwriting the boot sector or overwriting critical code in the pagefile.
Which versions are affected by CVE-2021-31727?
It affects 1 product.
Products include Malwarefox Antimalware.
How do I fix CVE-2021-31727?
No fix has been published for CVE-2021-31727 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-31727 being exploited?
There is no known exploitation of CVE-2021-31727 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-hh6m-r6vq-m2mg.