CVE-2004-0510 in OpenServer
Summary
by MITRE
Multiple buffer overflows in MMDF on OpenServer 5.0.6 and 5.0.7, and possibly other operating systems, may allow attackers to execute arbitrary code, as demonstrated via the execmail program.
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability identified as CVE-2004-0510 represents a critical security flaw affecting MMDF Mailer software running on OpenServer 5.0.6 and 5.0.7 operating systems, with potential exploitation across other platforms. This issue stems from multiple buffer overflow conditions that can be triggered through the execmail program, creating a significant attack surface for malicious actors seeking unauthorized system access. The vulnerability's classification aligns with CWE-121, which addresses stack-based buffer overflow conditions, and CWE-122, covering heap-based buffer overflow scenarios that are commonly exploited in such environments.
The technical implementation of this vulnerability involves improper input validation within the execmail program, which processes mail commands without adequate bounds checking on user-supplied data. When attackers provide maliciously crafted input exceeding the allocated buffer space, the overflow can overwrite adjacent memory locations including return addresses and control data. This memory corruption enables attackers to manipulate program execution flow and inject arbitrary code into the target system. The specific nature of the buffer overflow allows for both local privilege escalation and remote code execution depending on the attack vector and system configuration, making it particularly dangerous in multi-user environments where MMDF services are exposed to external networks.
The operational impact of this vulnerability extends beyond immediate code execution capabilities to encompass complete system compromise and potential data exfiltration. Attackers exploiting this vulnerability can gain elevated privileges, establish persistent backdoors, and move laterally within network environments where affected systems exist. The vulnerability's exploitation requires minimal prerequisites since it targets a core mail processing utility that typically runs with elevated privileges. This characteristic makes the vulnerability particularly attractive to threat actors seeking to establish footholds in enterprise networks where email systems serve as critical infrastructure components. The attack surface is further expanded when considering that MMDF implementations may be present on various Unix-based systems beyond just OpenServer platforms, potentially affecting a broader range of enterprise environments.
Security mitigations for CVE-2004-0510 should prioritize immediate patch application from vendors, as this vulnerability was addressed through software updates that implemented proper input validation and buffer management techniques. System administrators must conduct comprehensive inventory assessments to identify all instances of MMDF software across their network infrastructure and apply security patches promptly. Network segmentation strategies should be implemented to limit exposure of mail processing services to untrusted networks, while monitoring solutions should be deployed to detect anomalous mail processing activities that might indicate exploitation attempts. Additional protective measures include implementing mandatory access controls, disabling unnecessary mail services, and conducting regular security audits of mail server configurations. The vulnerability's characteristics align with attack patterns documented in the MITRE ATT&CK framework under the T1059.007 technique for command and scripting interpreter, as attackers can leverage the compromised system to execute arbitrary commands and establish persistent access through the executed code. Organizations should also consider implementing intrusion detection systems specifically configured to identify buffer overflow exploitation patterns and maintain comprehensive incident response procedures tailored to handle such critical vulnerabilities.