Privilege escalation in Insyde AhciBusDxe driver



Published: 2022-02-03
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
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AhciBusDxe
Hardware solutions / Drivers

Vendor

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU60271

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43522

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 5.3: 05.33.34, 5.2: 05.24.34, 5.1: 05.14.34


CPE2.3 External links

http://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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