CVE-2021-31727

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…

published May 17, 2021

CVSS
—
EPSS
0%
Percentile
30.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00374 · 30.2th percentile
Published
2021-05-17T12:05Z
EPSS history
Timeline
  • 17 MAY 12:05Z
    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…
    cvelistv5