Privilege escalation in Insyde AhciBusDxe driver



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-43522
CWE-ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
 AhciBusDxe
Hardware solutions / Drivers

Vendor Insyde Software

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU60271

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-43522

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in SMM. A remote attacker can write fixed or predictable data to SMRAM, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AhciBusDxe: before 5.1: 05.14.34

CPE2.3 External links

https://www.insyde.com/security-pledge


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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