CVE-1999-1046 in IMail
Summary
by MITRE
Buffer overflow in IMonitor in IMail 5.0 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long string to port 8181.
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Analysis
by VulDB Data Team • 12/01/2024
The vulnerability described in CVE-1999-1046 represents a critical buffer overflow flaw within the IMonitor component of IMail 5.0 email server software. This issue specifically affects the service listening on port 8181, which is commonly used for administrative monitoring functions within the IMail ecosystem. The buffer overflow occurs when the system receives a malformed input string that exceeds the allocated buffer space, creating a condition where adjacent memory regions can be overwritten. This type of vulnerability falls under CWE-121, which categorizes buffer overflow conditions where insufficient boundary checking allows attackers to write beyond allocated memory boundaries.
The technical exploitation of this vulnerability demonstrates how remote attackers can leverage the lack of input validation in the IMonitor service to craft malicious payloads. When a specially crafted long string is sent to port 8181, the system's failure to properly validate input length results in memory corruption that can lead to unpredictable behavior. The vulnerability's impact extends beyond simple denial of service, as the buffer overflow can potentially be leveraged to execute arbitrary code on the target system. This represents a classic example of how insufficient input sanitization can create pathways for privilege escalation and remote code execution.
From an operational perspective, this vulnerability poses significant risks to email server infrastructure that relies on IMail 5.0 for their messaging services. Organizations using this software are exposed to potential remote compromise of their email servers, which could result in complete system takeover, data exfiltration, or disruption of critical communication services. The attack vector is particularly concerning because it requires no authentication and can be executed from any remote location, making it a prime target for automated exploitation campaigns. The vulnerability's classification aligns with ATT&CK technique T1203, which covers exploitation for privilege escalation through buffer overflow conditions.
The mitigation strategies for this vulnerability should focus on immediate patching of the IMail 5.0 software to address the buffer overflow in the IMonitor component. Organizations should also implement network segmentation to restrict access to port 8181, particularly if the monitoring service is not essential for operations. Additionally, network-based intrusion detection systems should be configured to monitor for unusual traffic patterns on port 8181 that might indicate exploitation attempts. The remediation process should include thorough testing of patched software to ensure that the buffer overflow conditions are properly addressed while maintaining system functionality. Security teams should also conduct comprehensive vulnerability assessments to identify any other instances of similar buffer overflow conditions within their email infrastructure and related services.