CVE-2021-31728
MalwareFox AntiMalware ZemanaAntiMalware Ring 0 Code Execution Vulnerability
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.
INFO
Published Date :
May 17, 2021, 1:15 p.m.
Last Modified :
July 12, 2022, 5:42 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2021-31728 has a 9 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-31728.
| URL | Resource |
|---|---|
| https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31728.md | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A varient of SadBoy.Terminator - Uses the vulnerable 'Zemana Antimalware' driver to kill EDR.
C++ C
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
A nim re-write of Terminator by ZeroMemoryEx
Nim
None
None
vulnerability in zam64.sys, zam32.sys allowing ring 0 code execution. CVE-2021-31727 and CVE-2021-31728 public reference.
vulnerability cve-2021-31727 cve-2021-31728
C
Some usefull info when reverse engineering Kernel Mode Anti-Cheat
anti-cheat anticheat reverse-engineering kernel windows driver kernel-driver heuristics kmac
C++
Kernel Driver Utility
loader driver-loader dse byovd
C C++ Assembly
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-31728 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31728 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE CWE-863 NVD-CWE-Other -
Initial Analysis by [email protected]
May. 26, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31728.md No Types Assigned https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31728.md Third Party Advisory Added CWE NIST CWE-863 Added CPE Configuration OR *cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31728 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-31728
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.10264
percentile