cve/2021/CVE-2021-21787.md

CVE-2021-21787

Description

A privilege escalation vulnerability exists in the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O write requests. During IOCTL 0x9c40a0d8, the first dword passed in the input buffer is the device port to write to and the byte at offset 4 is the value to write via the OUT instruction. The OUT instruction can write one byte to the given I/O device port, potentially leading to escalated privileges of unprivileged users.

POC

Reference

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1254

Github

No PoCs found on GitHub currently.