CVE-2022-44611: Intel Celeron J6413 Privilege Escalation

CVE-2022-44611 Overview

CVE-2022-44611 is a privilege escalation vulnerability affecting the BIOS firmware across a wide range of Intel processors. The vulnerability stems from improper input validation in the BIOS firmware, which may allow a privileged user with adjacent network access to escalate their privileges on affected systems. This firmware-level vulnerability poses significant risks to enterprise environments, data centers, and embedded systems utilizing affected Intel processors.

Critical Impact

Privileged users with adjacent network access can exploit this BIOS firmware flaw to escalate privileges, potentially gaining full control over affected systems at the firmware level.

Affected Products

• Intel Core Processors (8th, 9th, 10th, and 11th Generation) including i3, i5, i7, and i9 variants
• Intel Xeon E-Series and W-Series Processors (E-2100, E-2200, E-2300 families and W-1300 series)
• Intel Atom x6000 Series, Celeron J/N Series, and Pentium J/N Series Processors

Discovery Timeline

• August 11, 2023 - CVE-2022-44611 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-44611

Vulnerability Analysis

This vulnerability is classified as an improper input validation flaw (CWE-20) residing within the BIOS firmware of multiple Intel processor families. The vulnerability allows an attacker who already possesses privileged access and is positioned on an adjacent network to exploit the input validation weakness to escalate their privileges further within the system.

BIOS firmware operates at the lowest level of the software stack, executing before the operating system loads. Vulnerabilities at this level are particularly dangerous because they can persist across operating system reinstallations, bypass traditional security controls, and provide attackers with deep system access that is difficult to detect or remediate.

The adjacent network attack vector indicates that the attacker must be on the same network segment as the target system, which somewhat limits the attack surface compared to remotely exploitable vulnerabilities. However, in enterprise environments with shared network infrastructure, this requirement may be easily satisfied by an insider threat or an attacker who has gained initial network access.

Root Cause

The root cause of CVE-2022-44611 is improper input validation within the BIOS firmware code. The firmware fails to adequately validate certain inputs, allowing a privileged user to supply malformed or unexpected data that the BIOS processes incorrectly. This lack of proper bounds checking or input sanitization creates a condition where an attacker can manipulate firmware behavior to gain elevated privileges.

Attack Vector

The attack requires the adversary to have existing privileged access to the target system and be positioned on an adjacent network. The exploitation flow involves:

1. The attacker establishes a position on the same network segment as the target system
2. Using their existing privileged access, the attacker crafts malicious input designed to exploit the input validation flaw
3. The BIOS firmware processes the malicious input without proper validation
4. Successful exploitation results in privilege escalation, potentially allowing the attacker to execute code at the firmware level or gain additional system access

Due to the nature of BIOS vulnerabilities, exploitation could potentially allow attackers to install persistent implants that survive operating system reinstallation, disable security features, or gain access to sensitive cryptographic material stored in firmware.

Detection Methods for CVE-2022-44611

Indicators of Compromise

• Unexpected changes to BIOS configuration settings or firmware version information
• Anomalous system behavior during boot sequences or firmware update processes
• Unusual adjacent network traffic patterns targeting system management interfaces
• Evidence of unauthorized firmware modifications in system logs

Detection Strategies

• Deploy hardware-based root of trust solutions to verify firmware integrity at boot time
• Monitor system management interfaces (SMI) for unusual activity or unauthorized access attempts
• Implement network segmentation and monitoring to detect adjacent network attack attempts
• Utilize firmware integrity verification tools to compare BIOS firmware against known-good hashes

Monitoring Recommendations

• Enable and monitor BIOS event logging where supported by the platform
• Implement network intrusion detection systems (NIDS) to identify suspicious adjacent network traffic
• Deploy endpoint detection and response (EDR) solutions capable of monitoring low-level system activity
• Establish baseline firmware configurations and alert on deviations

How to Mitigate CVE-2022-44611

Immediate Actions Required

• Review Intel's security advisory INTEL-SA-00813 for specific remediation guidance
• Identify all affected Intel processors in your environment using hardware inventory tools
• Prioritize systems in shared network environments or those accessible to potentially malicious insiders
• Implement network segmentation to limit adjacent network access to critical systems

Patch Information

Intel has released BIOS firmware updates to address this vulnerability. Organizations should contact their system or motherboard manufacturer to obtain the appropriate BIOS update for their specific hardware configuration. The vendor advisory provides detailed information about affected processor families and recommended firmware versions.

For systems utilizing NetApp products with affected Intel processors, refer to the NetApp Security Advisory NTAP-20230824-0001 for specific guidance.

Workarounds

• Restrict privileged access to systems with affected processors to minimize the pool of potential attackers
• Implement strict network access controls to limit adjacent network connectivity
• Enable BIOS password protection and secure boot features where available
• Monitor for unauthorized BIOS modification attempts and implement alerting

# Verify current BIOS version on Linux systems
sudo dmidecode -t bios | grep -E "Version|Release"

# Check processor model to determine if affected
cat /proc/cpuinfo | grep -E "model name" | head -1

# Monitor system management interface access (example)
journalctl -u ipmi | grep -i "authentication"