CVE-2021-21787

Summary

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.

Affected Software

VendorProductVersion RangeStatus
n/aIobitIOBit Advanced SystemCare Ultimate 14.2.0.220affected

Weaknesses

  • CWE-782: CWE-782: Exposed IOCTL with Insufficient Access Control

ADP Enrichment

CVE Program Container

Additional References

References