Description
Velocidex WinPmem versions 4.1 and below suffer from an Improper Input Validation vulnerability whereby an attacker with admin access can trigger a BSOD with a parallel thread changing the memory’s access right under the control of the user-mode application. This is due to verification only being performed at the beginning of the routine allowing the userspace to change page permissions half way through the routine. A valid workaround is a rule to detect unauthorized loading of winpmem outside incident response operations.
Problem types
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Product status
<= 4.1 (semver)
Credits
We thank David Baptiste from the ERNW Vulnerability Disclosure Team for responsibly disclosing this issue.
References
github.com/Velocidex/WinPmem/releases/tag/v4.1.dev1
