CVE-2021-22767 in PowerLogic EGX100
Summary
by MITRE • 06/11/2021
A CWE-20: Improper Input Validation vulnerability exists in PowerLogic EGX100 (Versions 3.0.0 and newer) and PowerLogic EGX300 (All Versions) that could cause denial of service or remote code execution via a specially crafted HTTP packet.This CVE ID is unique from CVE-2021-2276
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Analysis
by VulDB Data Team • 05/30/2026
The vulnerability identified as CVE-2021-22767 represents a critical security flaw classified under CWE-20: Improper Input Validation within PowerLogic EGX100 and EGX300 industrial network devices. This weakness manifests in the device's HTTP packet processing functionality where insufficient validation of incoming network requests allows malicious actors to exploit the system through crafted HTTP payloads. The affected versions include PowerLogic EGX100 running firmware versions 3.0.0 and newer, alongside all versions of PowerLogic EGX300 devices. The vulnerability's classification as a denial of service or remote code execution threat aligns with ATT&CK technique T1210: Exploitation of Remote Services, which specifically addresses the exploitation of services accessible over networks to gain unauthorized access or disrupt operations. The improper input validation creates a pathway for attackers to inject malicious data that can bypass normal security controls and potentially compromise the entire device.
The technical implementation of this vulnerability stems from inadequate sanitization and validation of HTTP request parameters received by the affected PowerLogic devices. When these devices process specially crafted HTTP packets, the malformed input can trigger unexpected behavior within the application layer, potentially leading to buffer overflows, stack corruption, or other memory-related issues that may result in system crashes or allow arbitrary code execution. The flaw demonstrates a classic input validation failure where the system fails to properly validate the structure, length, or content of incoming HTTP requests before processing them. This weakness is particularly concerning in industrial control systems where these devices often operate in critical infrastructure environments where availability and integrity are paramount. The vulnerability's impact extends beyond simple service disruption as it could potentially enable attackers to gain persistent access to the device, allowing them to manipulate configuration settings, access sensitive data, or use the compromised device as a foothold for further attacks within the industrial network.
The operational implications of CVE-2021-22767 pose significant risks to organizations relying on PowerLogic EGX series devices for energy management and monitoring in industrial environments. A successful exploitation could result in complete system compromise, leading to unauthorized access to critical energy infrastructure data and potentially disrupting power distribution operations. The vulnerability's remote exploitability means attackers do not require physical access to the devices, making it particularly dangerous for environments where physical security measures may be limited. Organizations implementing these devices in critical infrastructure settings face potential regulatory compliance issues, as the vulnerability could violate standards such as NIST SP 800-82 for industrial control systems security. The threat landscape for industrial control systems has evolved significantly, with adversaries increasingly targeting operational technology environments, and this vulnerability exemplifies how legacy industrial protocols can contain security gaps that align with ATT&CK framework's T1071.004: Application Layer Protocol - DNS techniques, where network-based attacks can be leveraged to compromise industrial control systems.
Mitigation strategies for CVE-2021-22767 should focus on immediate network segmentation and access control measures to limit exposure of affected devices to untrusted networks. Organizations should implement network access control lists to restrict HTTP access to only trusted administrative systems and establish monitoring protocols to detect anomalous HTTP traffic patterns that may indicate exploitation attempts. The implementation of web application firewalls specifically configured to filter HTTP requests and validate input parameters can provide additional protection layers. Device firmware updates should be prioritized, though the vulnerability description indicates that support status may be limited for affected versions. Network administrators should also consider implementing intrusion detection systems with signatures specifically designed to detect exploitation attempts targeting this vulnerability. The remediation process should include comprehensive network scanning to identify all affected devices and establish a timeline for firmware updates or hardware replacement. Organizations should also conduct thorough security assessments to understand the full attack surface and implement compensating controls such as disabling unnecessary HTTP services when not required for operational purposes. The vulnerability underscores the importance of maintaining current security patches for industrial control systems and highlights the need for robust security practices in OT environments that align with frameworks such as IEC 62443 for industrial automation and control systems security.