CVE-2021-21788 (GCVE-0-2021-21788)
Vulnerability from cvelistv5 – Published: 2021-07-07 16:39 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
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 0x9c40a0dc, the first dword passed in the input buffer is the device port to write to and the word 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. A local attacker can send a malicious IRP to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-782 - Exposed IOCTL with Insufficient Access Control
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
Impacted products
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| Author | Source | Type | Date | Other |
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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