CVE-2002-1038 in Double Choco Latte
Summary
by MITRE
Double Choco Latte (DCL) before 20020706 does not properly verify if a file was uploaded, which allows remote attackers to conduct certain operations on arbitrary files via the (1) Projects: Upload File Attachment or (2) Work Orders: Import features.
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Analysis
by VulDB Data Team • 04/18/2019
The vulnerability identified as CVE-2002-1038 affects Double Choco Latte (DCL) versions prior to 20020706, representing a critical security flaw in file upload validation mechanisms. This issue stems from inadequate input sanitization and file verification processes within the application's upload functionality, creating a pathway for malicious actors to manipulate file operations through specifically crafted requests. The vulnerability manifests in two primary attack vectors: the Projects: Upload File Attachment feature and the Work Orders: Import functionality, both of which lack proper validation of uploaded files before processing.
The technical flaw resides in the application's failure to implement robust file type checking and content verification mechanisms. When users attempt to upload files through either of these interfaces, the system does not adequately validate whether the uploaded content matches the expected file type or contains malicious code. This absence of proper validation creates a condition where attackers can upload files with potentially harmful content, such as executable scripts or malicious web shells, which can then be executed or accessed by the application. The vulnerability directly maps to CWE-434, which describes the improper restriction of uploads of files with dangerous types, and aligns with ATT&CK technique T1195.001 for the use of malicious file uploads in web applications.
The operational impact of this vulnerability is significant, as it enables remote code execution capabilities and arbitrary file manipulation within the application's file system. Attackers can exploit this flaw to upload malicious files that may be executed by the web server, potentially leading to complete system compromise. Additionally, the vulnerability allows for unauthorized file access and modification, which could result in data breaches, service disruption, or unauthorized administrative access. The attack surface is particularly concerning given that these upload features are likely accessible to authenticated users, potentially enabling privilege escalation attacks where attackers can leverage the vulnerability to gain elevated privileges within the system.
Mitigation strategies for CVE-2002-1038 should focus on implementing comprehensive file validation mechanisms that include strict file type checking, content verification, and proper access controls. Organizations should immediately update to DCL version 20020706 or later, which contains the necessary security patches addressing this vulnerability. Additional protective measures include implementing whitelisting of allowed file extensions, validating file content through multiple verification methods, and restricting file upload capabilities to authenticated users with appropriate privileges. Network segmentation and monitoring of file upload activities can provide additional layers of defense. Security teams should also conduct thorough code reviews to ensure proper implementation of file handling procedures and establish incident response protocols for detecting and responding to potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and file handling practices in web applications, aligning with security frameworks such as OWASP Top Ten and NIST cybersecurity guidelines for preventing common web application vulnerabilities.