CVE-2024-48857 in QNX Software Development Platform
Summary
by MITRE • 01/14/2025
NULL pointer dereference in the PCX image codec in QNX SDP versions 8.0, 7.1 and 7.0 could allow an unauthenticated attacker to cause a denial-of-service condition in the context of the process using the image codec.
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Analysis
by VulDB Data Team • 01/14/2025
The vulnerability identified as CVE-2024-48857 represents a critical null pointer dereference flaw within the PCX image codec implementation of QNX Software Development Platform versions 8.0, 7.1, and 7.0. This issue manifests when processing specially crafted PCX image files that contain malformed or incomplete data structures, specifically targeting the image decoding pipeline where the codec fails to properly validate input parameters before attempting memory access operations. The root cause stems from inadequate input validation mechanisms within the PCX decoder component, which operates under the assumption that all incoming image data conforms to expected format specifications. When encountering unexpected data patterns or missing fields within the PCX file structure, the codec attempts to dereference a null pointer reference, leading to immediate process termination and subsequent denial-of-service conditions.
The operational impact of this vulnerability extends beyond simple service interruption as it affects any application or system component that relies on the QNX image processing stack for PCX file handling. This includes embedded systems, automotive infotainment platforms, industrial control systems, and other environments where QNX SDP serves as the underlying operating system. The vulnerability is particularly concerning because it requires no authentication credentials to exploit, making it accessible to any remote or local attacker who can influence the processing of PCX images through legitimate system interfaces. The denial-of-service condition affects not only the specific process utilizing the image codec but can potentially cascade through system components that depend on proper image handling functionality, leading to broader operational disruptions in mission-critical applications.
From a cybersecurity perspective, this vulnerability aligns with CWE-476, which specifically addresses null pointer dereference conditions in software implementations. The flaw demonstrates poor defensive programming practices where input validation occurs too late in the processing pipeline, allowing malformed data to propagate through the system before causing a crash. The ATT&CK framework categorizes this vulnerability under the T1499.004 sub-technique for "Endpoint Denial of Service" as it enables adversaries to disrupt system operations through targeted resource consumption or process termination. The vulnerability's exploitation pattern suggests a potential attack vector involving malicious file delivery through email attachments, web downloads, or file sharing mechanisms that could trigger the PCX codec processing path when users open or preview these files. Security professionals should note that this issue represents a classic example of how image processing libraries can become attack surfaces when insufficient validation is implemented, particularly in embedded systems where patching cycles may be extended.
Mitigation strategies for CVE-2024-48857 should prioritize immediate implementation of input validation controls within applications that process PCX images, including the deployment of additional data sanitization layers before passing files to the QNX image codec. System administrators should consider implementing file type restrictions or content filtering mechanisms to prevent untrusted PCX files from reaching vulnerable processes. The most effective long-term solution involves upgrading to QNX SDP versions that contain patches addressing this specific null pointer dereference vulnerability, as provided by the vendor. Organizations should also implement monitoring and logging mechanisms to detect unusual patterns of image processing failures or process terminations that could indicate exploitation attempts. Additionally, application sandboxing techniques can be employed to isolate image processing components, limiting the potential impact of successful exploitation attempts to individual processes rather than entire system operations. The vulnerability highlights the importance of comprehensive security testing for image processing libraries and the need for robust input validation at multiple levels within software architectures.