CVE-2004-2239 in vpopmail
Summary
by MITRE
Buffer overflow in vsybase.c in vpopmail 5.4.2 and earlier might allow attackers to cause a denial of service or execute arbitrary code.
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Analysis
by VulDB Data Team • 07/18/2017
The vulnerability identified as CVE-2004-2239 represents a critical buffer overflow flaw within the vpopmail email server software version 5.4.2 and earlier. This issue specifically affects the vsybase.c component which handles database operations for the vpopmail system. The buffer overflow occurs when processing certain input data, creating an opportunity for malicious actors to exploit the weakness and potentially gain unauthorized access to systems running vulnerable versions of vpopmail. The vulnerability resides in the software's inability to properly validate input lengths before copying data into fixed-size buffers, a fundamental security flaw that has been documented under CWE-121 as a classic buffer overflow condition.
The technical exploitation of this vulnerability involves crafting malicious input that exceeds the allocated buffer space in the vsybase.c module, leading to memory corruption that can be leveraged to execute arbitrary code or cause denial of service conditions. Attackers can potentially manipulate the email server's database operations to trigger the overflow, which may result in the execution of malicious instructions in the context of the running vpopmail process. This type of vulnerability aligns with ATT&CK technique T1059.007 for command and script injection, where attackers can leverage buffer overflows to inject and execute malicious code within the target system's memory space. The flaw essentially allows for privilege escalation and remote code execution when successfully exploited.
From an operational impact perspective, systems running vulnerable versions of vpopmail face significant security risks including complete system compromise, data breaches, and unauthorized access to email services. The denial of service aspect can render email services unavailable to legitimate users, while the arbitrary code execution capability provides attackers with persistent access to the compromised systems. Organizations using vpopmail for email management and hosting services are particularly vulnerable, as this flaw can be exploited to gain control over email infrastructure and potentially pivot to other systems within the network. The vulnerability affects the core functionality of email server operations, making it a critical concern for system administrators and security teams responsible for email infrastructure protection.
Mitigation strategies for CVE-2004-2239 primarily focus on immediate software updates and patches provided by the vpopmail maintainers. System administrators should prioritize upgrading to vpopmail versions that contain fixes for this buffer overflow vulnerability, as the original vulnerable versions are no longer supported. Additional protective measures include implementing input validation controls, network segmentation to limit exposure, and monitoring for suspicious activities that may indicate exploitation attempts. The vulnerability demonstrates the importance of regular security updates and proper code review processes, particularly in network services that handle external input. Organizations should also consider implementing intrusion detection systems and security monitoring to detect potential exploitation attempts and maintain comprehensive backup and recovery procedures to address potential system compromise. This vulnerability serves as a reminder of the critical need for secure coding practices and regular vulnerability assessments in email server software to prevent similar issues from occurring in the future.