CVE-2018-2404 in Disclosure Management
Summary
by MITRE
SAP Disclosure Management 10.1 allows an attacker to upload any file without proper file format validation.
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Analysis
by VulDB Data Team • 02/27/2023
SAP Disclosure Management version 10.1 contains a critical security vulnerability that enables remote attackers to bypass file validation mechanisms and upload arbitrary files to the system. This vulnerability stems from insufficient input validation within the file upload functionality, which fails to properly verify the file formats and content before processing. The flaw exists in the application's file handling logic where it does not adequately enforce file type restrictions or perform proper content inspection, creating an avenue for malicious file injection. According to CWE-434, this represents a weakness where the application accepts files from untrusted sources without proper validation, making it susceptible to various attack vectors including malware deployment and code execution. The vulnerability impacts the integrity and confidentiality of the disclosure management system, as attackers can potentially upload malicious files such as web shells, executables, or scripts that could compromise the entire infrastructure.
The technical implementation of this vulnerability allows an attacker to manipulate the file upload process by crafting requests that bypass the intended validation checks. The system's file validation mechanism appears to rely on simple file extension checks or inadequate content type verification, which can be easily circumvented through various techniques such as renaming files with legitimate extensions, using null byte injection, or manipulating HTTP headers. This type of vulnerability falls under the ATT&CK framework's technique T1195 for "Supply Chain Compromise" and T1059 for "Command and Scripting Interpreter" when exploited for remote code execution. The lack of proper file validation creates a pathway for attackers to deploy malicious payloads that can establish persistent access, exfiltrate sensitive data, or disrupt normal business operations within the disclosure management environment.
The operational impact of this vulnerability extends beyond simple file upload capabilities and can severely compromise the security posture of organizations relying on SAP Disclosure Management for regulatory compliance and financial reporting. Attackers exploiting this vulnerability can potentially gain unauthorized access to sensitive financial disclosures, confidential business information, or regulatory documents that the system is designed to protect. The vulnerability creates opportunities for attackers to establish backdoors, deploy additional malware, or use the compromised system as a launch point for lateral movement within the network. Organizations using this software may face regulatory violations, financial penalties, and reputational damage if sensitive data is compromised through unauthorized file uploads. The vulnerability also affects the system's availability as attackers could potentially upload files that cause system instability or denial of service conditions.
Organizations should implement multiple layers of defense to mitigate this vulnerability including immediate patching of the SAP Disclosure Management system to the latest available security releases. Network segmentation and strict firewall rules should be implemented to limit access to the disclosure management system to authorized personnel only. File upload restrictions should be enhanced with comprehensive content validation, including MIME type checking, file signature verification, and size limitations. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other applications within the organization's infrastructure. According to NIST SP 800-53 security controls, organizations should implement proper access controls, audit logging, and intrusion detection mechanisms to monitor for suspicious file upload activities. Additionally, implementing web application firewalls and content filtering solutions can provide additional protection against exploitation attempts, while regular security awareness training for administrators can help prevent social engineering attacks that might leverage this vulnerability.