CVE-2022-24942 in uC-HTTP
Summary
by MITRE • 11/16/2022
Heap based buffer overflow in HTTP Server functionality in Micrium uC-HTTP 3.01.01 allows remote code execution via HTTP request.
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Analysis
by VulDB Data Team • 12/19/2022
The vulnerability CVE-2022-24942 represents a critical heap-based buffer overflow affecting the HTTP server functionality within Micrium uC-HTTP version 3.01.01. This flaw exists in embedded systems that utilize the uC-HTTP library for web server operations, creating a significant security risk for IoT devices, industrial control systems, and other network-connected embedded platforms that rely on this software component. The vulnerability specifically manifests when processing HTTP requests, making it particularly dangerous in environments where remote access is permitted.
The technical implementation of this buffer overflow occurs within the heap memory management of the HTTP server module, where insufficient bounds checking allows an attacker to write data beyond the allocated buffer boundaries. When a specially crafted HTTP request is received, the server fails to properly validate input length or content, leading to memory corruption that can be exploited to overwrite adjacent memory locations. This type of vulnerability falls under CWE-121 heap-based buffer overflow, which is classified as a memory safety issue that directly enables arbitrary code execution capabilities. The vulnerability is particularly concerning because it allows for remote code execution without requiring local access or authentication, making it highly attractive to threat actors targeting embedded systems.
The operational impact of this vulnerability extends beyond simple exploitation to encompass complete system compromise and potential denial of service conditions. Attackers can leverage this weakness to execute arbitrary code on vulnerable systems, potentially gaining full control over the device, installing backdoors, or using the compromised system as a pivot point for further attacks within a network. In industrial environments where uC-HTTP is commonly deployed, such as manufacturing control systems, medical devices, or network infrastructure, this vulnerability could lead to operational disruption, data breaches, or even physical safety risks. The remote nature of the exploit means that attackers can target vulnerable systems from anywhere on the internet without requiring physical access or network proximity.
Mitigation strategies for CVE-2022-24942 should prioritize immediate patching of affected systems, with vendors releasing updated versions of the uC-HTTP library that address the buffer overflow conditions through proper input validation and memory bounds checking. Organizations should implement network segmentation and access controls to limit exposure of vulnerable systems, while also monitoring for suspicious HTTP traffic patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this type of vulnerability under T1210 exploitation for execution, and defensive measures should include regular security assessments of embedded systems and implementation of intrusion detection systems to monitor for anomalous HTTP request patterns. Additionally, network administrators should consider implementing web application firewalls and endpoint protection solutions that can detect and block malicious HTTP requests before they reach vulnerable servers, while also establishing incident response procedures to address potential exploitation events.