CVE-2022-23930: HP PC BIOS Privilege Escalation Flaw

CVE-2022-23930 Overview

CVE-2022-23930 identifies multiple security vulnerabilities in the system BIOS of certain HP PC products. These BIOS/UEFI firmware flaws may allow attackers with local access and high privileges to escalate privileges beyond the operating system boundary, execute arbitrary code at the firmware level, cause denial of service conditions, and potentially disclose sensitive information stored in protected memory regions.

Critical Impact

Successful exploitation could allow attackers to execute code at the BIOS/UEFI level, bypassing operating system security controls and potentially persisting malware below the OS layer.

Affected Products

• HP PC BIOS (multiple product lines)
• Various HP desktop and laptop systems with vulnerable firmware versions
• Systems running unpatched HP BIOS firmware

Discovery Timeline

• 2022-03-11 - CVE-2022-23930 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-23930

Vulnerability Analysis

This vulnerability exists within the HP PC BIOS firmware, which operates at the lowest level of system software. BIOS/UEFI vulnerabilities are particularly concerning because they execute before the operating system loads, meaning traditional security software has limited visibility into this attack surface. The vulnerability requires local access and high privileges to exploit, but the scope is changed—meaning successful exploitation can affect resources beyond the vulnerable component's security boundary.

The firmware-level nature of this vulnerability means that exploitation could allow an attacker to establish persistence that survives operating system reinstallation, modify boot configurations, or access protected memory regions that would normally be inaccessible to the operating system and its applications.

Root Cause

The root cause stems from vulnerabilities in the HP PC BIOS firmware implementation. While specific technical details are not publicly disclosed (classified as NVD-CWE-noinfo), BIOS vulnerabilities of this nature typically arise from improper input validation in System Management Mode (SMM) handlers, insufficient access controls for firmware update mechanisms, or memory corruption issues in privileged firmware code paths.

Attack Vector

The attack vector is local, requiring an attacker to have existing access to the target system with high privileges. This typically means the attacker must already have administrator or root-level access to the operating system. From this position, the attacker could leverage the BIOS vulnerability to:

• Escalate privileges from the operating system level to the firmware level
• Execute arbitrary code within the BIOS/UEFI environment
• Bypass Secure Boot and other firmware-level security mechanisms
• Establish persistent malware that survives OS reinstallation

Exploitation could involve crafted interactions with BIOS interfaces, SMM callouts, or manipulation of firmware update processes. For detailed technical information, refer to the HP Security Advisory.

Detection Methods for CVE-2022-23930

Indicators of Compromise

• Unexpected BIOS/UEFI firmware version changes or modifications
• System Management Mode (SMM) anomalies detected during boot
• Unauthorized modifications to UEFI variables or boot configuration
• Secure Boot validation failures or unexpected boot chain modifications

Detection Strategies

• Implement firmware integrity monitoring solutions to detect unauthorized BIOS modifications
• Enable UEFI Secure Boot and monitor for validation failures
• Use hardware-based root of trust mechanisms (TPM) to verify boot integrity
• Deploy endpoint detection solutions capable of monitoring pre-boot and firmware-level activity

Monitoring Recommendations

• Regularly audit BIOS versions across the enterprise against HP's published firmware updates
• Monitor for attempts to access or modify firmware-related system interfaces
• Implement centralized logging for firmware update events and BIOS configuration changes
• Utilize SentinelOne's firmware protection capabilities to detect anomalous low-level system behavior

How to Mitigate CVE-2022-23930

Immediate Actions Required

• Identify all HP PC systems in your environment and inventory current BIOS versions
• Download and apply the latest BIOS firmware updates from HP's official support channels
• Enable BIOS password protection to prevent unauthorized firmware modifications
• Ensure Secure Boot is enabled on all affected systems

Patch Information

HP has released BIOS firmware updates to address these vulnerabilities. System administrators should consult the HP Security Advisory (ish_5817864-5817896-16) to identify the specific firmware versions required for their hardware models. BIOS updates should be applied following HP's documented procedures, ensuring systems are properly backed up before firmware modifications.

Workarounds

• Restrict local administrative access to affected systems to limit exploitation potential
• Enable BIOS administrator password to prevent unauthorized firmware configuration changes
• Use HP Sure Start or similar firmware protection features if available on affected hardware
• Implement physical security controls to prevent unauthorized local access to vulnerable systems

# Example: Check current BIOS version on Windows systems
wmic bios get smbiosbiosversion,manufacturer,releasedate

# Verify Secure Boot status
Confirm-SecureBootUEFI

# Review HP-specific BIOS settings via PowerShell (HP systems)
Get-WmiObject -Namespace root/hp/instrumentedBIOS -Class HP_BIOSSetting | Select-Object Name,CurrentValue