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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: talos

Published: 2021-07-07T16:39:44

Updated: 2024-08-03T18:23:29.434Z

Reserved: 2021-01-04T00:00:00

Link: CVE-2021-21787

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-07-07T17:15:07.957

Modified: 2022-07-29T12:58:11.467

Link: CVE-2021-21787

cve-icon Redhat

No data.