CVE-2022-24436: Intel Processor Information Disclosure Flaw

CVE-2022-24436 Overview

CVE-2022-24436 is a side-channel vulnerability affecting Intel processors where observable behavior in power management throttling mechanisms can be exploited by an authenticated attacker to potentially disclose sensitive information via network access. This vulnerability falls under the category of timing-based side-channel attacks, leveraging the observable differences in processor power management behavior to infer protected data.

Critical Impact

Authenticated attackers can exploit power management throttling behavior in Intel processors to leak sensitive information remotely, potentially compromising cryptographic keys or other confidential data processed by the affected systems.

Affected Products

• Intel Processors (various models)
• Systems incorporating affected Intel processor hardware
• NetApp products containing affected Intel processors

Discovery Timeline

• 2022-06-15 - CVE CVE-2022-24436 published to NVD
• 2025-05-05 - Last updated in NVD database

Technical Details for CVE-2022-24436

Vulnerability Analysis

This vulnerability is classified under CWE-203 (Observable Discrepancy), which describes a class of weaknesses where differences in observable behavior can reveal sensitive information to attackers. In the context of CVE-2022-24436, the power management throttling mechanisms in affected Intel processors exhibit observable behavioral patterns that can be measured and analyzed by authenticated users with network access.

Modern processors implement sophisticated power management features including dynamic voltage and frequency scaling (DVFS) to balance performance and energy consumption. These power management decisions are influenced by workload characteristics, including the types of operations being performed. When cryptographic operations or other sensitive computations are executed, the power consumption patterns can differ measurably from other workloads.

An authenticated attacker positioned within the network can observe these power management throttling behaviors to extract information about the computational activities occurring on the target system. This represents a software-observable side-channel that bypasses traditional memory isolation protections.

Root Cause

The root cause of this vulnerability lies in the architectural design of Intel processor power management systems. The power throttling mechanisms exhibit observable behavioral differences based on the computational workload, and these differences are accessible to authenticated users via network interfaces. The lack of sufficient isolation between power management telemetry and user-accessible interfaces creates the side-channel that enables information disclosure.

Attack Vector

The attack leverages network access to monitor power management throttling behavior on affected Intel processors. An authenticated user can observe variations in power management states that correlate with specific computational operations being performed by other processes or users on the system. By carefully timing network interactions and analyzing response characteristics that reflect underlying power states, an attacker can potentially reconstruct sensitive data such as cryptographic keys or other protected information.

The attack requires authenticated access to the target system via network, making it exploitable remotely but requiring valid credentials or authentication tokens. The attacker does not need local console access, expanding the potential attack surface to any authenticated network session.

Detection Methods for CVE-2022-24436

Indicators of Compromise

• Unusual patterns of network queries targeting system power management interfaces or performance monitoring capabilities
• Authenticated sessions exhibiting timing-analysis behavior with repeated precise queries
• Anomalous monitoring of processor frequency or power state information from network-connected clients
• Attempts to correlate network timing with known cryptographic operation patterns

Detection Strategies

• Monitor for authenticated users making unusual numbers of requests that could be used for timing analysis
• Implement anomaly detection for access patterns to processor performance and power management telemetry
• Audit network sessions for behavior consistent with side-channel exploitation attempts
• Deploy endpoint detection solutions capable of identifying power analysis attack patterns

Monitoring Recommendations

• Enable detailed logging of authenticated session activity, particularly around system management interfaces
• Implement rate limiting on access to processor performance monitoring capabilities
• Deploy network traffic analysis to identify patterns consistent with timing-based information gathering
• Monitor for unusual correlation attempts between network activity and system power states

How to Mitigate CVE-2022-24436

Immediate Actions Required

• Review the Intel Security Advisory SA-00698 for affected processor models and recommended mitigations
• Apply firmware and microcode updates from Intel as they become available
• Review the NetApp Security Advisory NTAP-20220624-0007 for NetApp-specific guidance
• Restrict authenticated network access to affected systems where possible

Patch Information

Intel has published security advisory SA-00698 addressing this vulnerability. Organizations should consult the Intel Security Advisory SA-00698 for specific mitigation guidance, firmware updates, and affected processor lists. NetApp customers should also review the NetApp Security Advisory for product-specific patches and configuration guidance.

Workarounds

• Limit authenticated network access to systems processing sensitive cryptographic operations
• Implement network segmentation to isolate systems handling confidential data from potentially malicious authenticated users
• Consider disabling or restricting access to power management telemetry interfaces where operationally feasible
• Deploy additional authentication controls for sensitive systems to reduce the pool of potentially malicious authenticated users

# Example: Restrict access to power management interfaces (system-specific)
# Consult Intel documentation for specific configuration options
# Review BIOS/UEFI settings for power management telemetry controls