CVE-2021-21787
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductIobit Advanced Systemcare Ultimate
PublishedJul 7, 2021
First seenJul 7, 2021
Weakness typeCWE-782CWE-782
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| iobit advanced_systemcare_ultimate | 14.2.0.220 | — |
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