CVE-2025-52636 in AION
Summary
by MITRE • 03/16/2026
HCL AION is affected by a vulnerability related to the handling of upload size limits. Improper control or validation of upload sizes may allow excessive resource consumption, which could potentially lead to service degradation or denial-of-service conditions under certain scenarios.
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Analysis
by VulDB Data Team • 03/23/2026
The vulnerability identified as CVE-2025-52636 affects HCL AION, a platform that processes file uploads and manages resource allocation. This issue stems from inadequate validation mechanisms within the upload handling subsystem, specifically concerning the maximum file size limits that can be processed. The flaw represents a critical weakness in the application's resource management architecture, where the system fails to properly enforce or validate upload size constraints. When users attempt to upload files that exceed predefined limits, the system does not adequately reject or process these requests, potentially allowing malicious actors to exploit this behavior for resource exhaustion attacks. The vulnerability manifests when the application fails to implement proper input validation controls, creating an opportunity for attackers to consume excessive system resources through carefully crafted upload operations.
The technical implementation of this vulnerability involves the absence of robust size validation checks within the file upload processing pipeline. When a file upload request is received, the system should verify that the file size conforms to established limits before beginning the upload process. However, in affected versions of HCL AION, this validation step is either missing entirely or insufficiently implemented, allowing files of any size to be accepted and processed. This lack of proper boundary checking creates a condition where resource consumption can grow without constraint, potentially leading to memory exhaustion, disk space depletion, or CPU overutilization. The vulnerability aligns with CWE-129, which describes improper validation of array indices and buffer overflows, and more specifically with CWE-400, which addresses unchecked resource consumption. The flaw essentially creates an environment where malicious users can leverage the upload functionality to systematically consume system resources, potentially leading to cascading failures throughout the platform's operational capacity.
The operational impact of this vulnerability extends beyond simple resource consumption, as it creates potential pathways for denial-of-service conditions that can severely impact platform availability and user experience. When an attacker successfully exploits this vulnerability, they can cause legitimate users to experience service degradation or complete unavailability of the upload functionality. The resource exhaustion can occur at multiple levels including memory allocation, disk space utilization, and processing power consumption, creating a multi-faceted attack vector. Depending on the scale of the attack, this vulnerability could result in complete system shutdown, requiring manual intervention to restore normal operations. The impact is particularly concerning in environments where HCL AION serves as a critical component of business operations, as it could lead to significant downtime and potential revenue loss. This vulnerability also creates opportunities for attackers to perform reconnaissance and establish persistence within the system through resource exhaustion attacks that can mask other malicious activities.
Mitigation strategies for CVE-2025-52636 should focus on implementing comprehensive upload size validation controls at multiple layers of the application architecture. Organizations should immediately configure strict file size limits within the HCL AION platform, ensuring that all upload operations are validated against predetermined maximum thresholds before any processing occurs. The implementation should include both client-side and server-side validation mechanisms to prevent bypass attempts and ensure consistent enforcement across all access points. System administrators should also implement monitoring and alerting capabilities to detect unusual upload patterns that may indicate exploitation attempts. Additionally, the platform should incorporate automatic resource allocation limits and monitoring to prevent individual upload operations from consuming disproportionate system resources. Organizations should follow ATT&CK technique T1499, which addresses resource exhaustion attacks, by implementing proper rate limiting and upload throttling mechanisms. The recommended approach includes deploying automated tools to scan for and patch vulnerable installations, implementing network segmentation to limit potential attack vectors, and establishing incident response procedures specifically designed to address resource exhaustion scenarios. Regular security assessments should verify that upload validation controls remain effective and that system resources are properly monitored to prevent exploitation of this vulnerability.