CVE-2022-34414

Vulnerability

The vulnerability is an improper SMM communication buffer verification in Dell PowerEdge BIOS and Dell Precision BIOS, as described in DSA-2022-204 [1]. A local malicious user with high privileges may exploit this flaw. The exact affected BIOS versions are not listed in the available reference, but the advisory covers multiple CVEs including CVE-2022-34414.

Exploitation

An attacker requires local access and high privileges (e.g., administrative or root) to exploit this vulnerability. The attack complexity is high, and user interaction is not required. The exploitation involves manipulating SMM communication buffers to trigger the improper verification, potentially leading to arbitrary code execution or denial of service.

Impact

Successful exploitation could allow the attacker to execute arbitrary code in System Management Mode (SMM) or cause a denial of service. This could lead to full compromise of confidentiality, integrity, and availability of the affected system.

Mitigation

Dell has released a security advisory (DSA-2022-204) with BIOS updates to address this vulnerability [1]. Users should apply the latest BIOS update for their specific Dell PowerEdge or Precision model from the Dell support site. No workaround is mentioned in the available reference.