Exposed IOCTL with Insufficient Access Control in Advanced SystemCare Ultimate - CVE-2021-21787
Published: July 8, 2021
Vulnerability identifier: #VU54600
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21787
CWE-ID: CWE-782
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain elevated privileges on the system.
The vulnerability exists the way IOBit Advanced SystemCare Ultimate driver handles Privileged I/O write requests within OUT byte. A local user can use a specially crafted I/O request packet (IRP) and escalate privileges.
Affected software
Advanced SystemCare Ultimate
How to mitigate CVE-2021-21787
Install updates from vendor's website.
Advanced SystemCare Ultimate - update to 14.3.0