CVE-2009-0700 in Business Manager
Summary
by MITRE
Plunet BusinessManager 4.1 and earlier allows remote authenticated users to bypass access restrictions and (1) read sensitive Customer or Order data via a modified Pfad parameter to pagesUTF8/Sys_DirAnzeige.jsp, or (2) list sensitive Jobs via a direct request to pagesUTF8/auftrag_job.jsp.
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Analysis
by VulDB Data Team • 11/29/2024
The vulnerability described in CVE-2009-0700 represents a critical access control flaw within Plunet BusinessManager version 4.1 and earlier systems. This issue stems from insufficient input validation and improper authorization checks within the web application's parameter handling mechanisms. The vulnerability affects the application's ability to properly verify user permissions before granting access to sensitive business data, creating a pathway for authenticated attackers to circumvent intended security controls.
The technical implementation of this vulnerability occurs through manipulation of the Pfad parameter in the Sys_DirAnzeige.jsp page and direct access attempts to the auftrag_job.jsp endpoint. When users submit modified Pfad parameters, the application fails to properly validate the requested resource paths against the authenticated user's permission levels, allowing unauthorized data access. This type of vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems. The flaw demonstrates a classic case of insufficient input sanitization where the application trusts user-supplied parameters without adequate validation or access control verification.
The operational impact of this vulnerability extends beyond simple data exposure to encompass significant business risks including customer data breaches, competitive intelligence theft, and potential regulatory compliance violations. Attackers can access sensitive customer information and order details, which may contain personal identification numbers, financial data, and business-critical transaction records. The ability to list sensitive jobs through direct requests to the auftrag_job.jsp endpoint compounds the risk by providing attackers with comprehensive visibility into business operations and resource allocation. This vulnerability can be exploited by malicious actors who have already gained legitimate authentication credentials, making it particularly dangerous in environments where privilege escalation is not adequately controlled.
Mitigation strategies should focus on implementing robust input validation and access control mechanisms throughout the application architecture. The primary remediation involves strengthening parameter validation in the Pfad parameter handling within Sys_DirAnzeige.jsp and ensuring proper authentication checks before any sensitive data access is permitted. Organizations should implement principle of least privilege controls, where access to business-critical endpoints like auftrag_job.jsp requires explicit authorization verification. Additionally, implementing proper session management, input sanitization, and comprehensive logging of access attempts can help detect and prevent exploitation attempts. This vulnerability demonstrates the importance of following secure coding practices as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting, emphasizing the need for layered security approaches. Regular security testing and code reviews are essential to identify and remediate similar access control weaknesses before they can be exploited by adversaries.