CVE-2004-1102 in Mailpost
Summary
by MITRE
MailPost 5.1.1sv, and possibly earlier versions, displays a different error message depending on whether the requested file exists or not, which allows remote attackers to gain sensitive information.
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Analysis
by VulDB Data Team • 11/21/2024
The vulnerability identified as CVE-2004-1102 affects MailPost version 5.1.1sv and potentially earlier releases, presenting a significant information disclosure risk through inconsistent error messaging. This flaw resides in the application's file access handling mechanism where the system provides different error responses based on whether a requested file exists within the system's filesystem. The inconsistent error messages create a directory traversal information disclosure vulnerability that can be exploited by remote attackers to enumerate system files and potentially gain insights into the underlying filesystem structure.
This vulnerability maps directly to CWE-200, which describes the exposure of sensitive information through error messages, and represents a classic example of information leakage that can be leveraged for further attacks. The flaw operates at the application layer and demonstrates poor error handling practices where the system's response varies based on file existence rather than providing generic error responses. Attackers can exploit this by systematically requesting files and observing the different error messages returned, effectively mapping the filesystem structure without authentication.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a reconnaissance tool for more sophisticated attacks. Remote attackers can use the varying error messages to identify valid file paths, discover system configurations, and potentially locate sensitive files such as configuration files, database connection strings, or other system resources that might contain authentication credentials or other confidential data. This information can then be used to plan more targeted attacks against the system.
The attack surface for this vulnerability is significant as it allows unauthenticated remote exploitation, making it particularly dangerous in environments where MailPost is accessible from external networks. The flaw can be exploited through any interface that processes file requests, potentially affecting web interfaces, API endpoints, or other application components that interact with the filesystem. This vulnerability aligns with ATT&CK technique T1212, which involves exploitation of information disclosure vulnerabilities to gather system information.
Mitigation strategies for this vulnerability should focus on implementing consistent error handling across all file access operations. Organizations should ensure that all file access operations return identical error messages regardless of whether the requested file exists, thereby preventing information leakage through error responses. The recommended approach involves modifying the application code to standardize error handling, implementing generic error messages for file access operations, and conducting thorough code reviews to identify similar patterns throughout the application. Additionally, system administrators should consider implementing proper access controls and network segmentation to limit exposure of vulnerable applications to external threats. Regular security assessments and vulnerability scanning should be performed to identify similar information disclosure issues in other applications and systems within the environment.