CVE-2021-31728

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.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 7.48% Top 10%

Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31728.md	third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-31728?: CVE-2021-31728 has been scored as a high severity vulnerability.
How to fix CVE-2021-31728?: To fix CVE-2021-31728, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31728 being actively exploited in the wild?: It is possible that CVE-2021-31728 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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