CVE-2005-1014 in Professional Edition
Summary
by MITRE
Buffer overflow in the IMAP service for MailEnable Enterprise 1.04 and earlier and Professional 1.54 allows remote attackers to execute arbitrary code via a long AUTHENTICATE command.
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Analysis
by VulDB Data Team • 07/09/2019
The vulnerability identified as CVE-2005-1014 represents a critical buffer overflow flaw within the IMAP service of MailEnable email server software versions 1.04 and earlier for Enterprise edition and 1.54 and earlier for Professional edition. This vulnerability resides in the authentication handling mechanism of the IMAP protocol implementation, specifically during the processing of AUTHENTICATE commands. The flaw occurs when the server fails to properly validate the length of input data provided during the authentication phase, creating an opportunity for malicious input to overwrite adjacent memory locations in the application's memory space.
The technical implementation of this vulnerability stems from inadequate bounds checking within the IMAP service's command processing logic. When a remote attacker sends a specially crafted AUTHENTICATE command containing an excessive amount of data, the buffer allocated to store this input exceeds its designated memory boundaries. This buffer overflow condition allows an attacker to overwrite critical memory structures including return addresses, function pointers, and other control data. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which directly enables arbitrary code execution capabilities when the overflowed memory is subsequently executed as code.
From an operational perspective, this vulnerability presents a severe threat to email server infrastructure since it allows remote code execution without requiring authentication. Attackers can exploit this flaw from any network location to gain complete control over the affected MailEnable server, potentially leading to data theft, service disruption, or further network penetration. The vulnerability is particularly dangerous because it targets the IMAP service which is commonly exposed to external networks and often used for legitimate email access by multiple users. The attack vector requires only sending a malformed AUTHENTICATE command to the IMAP port, making it easily exploitable by automated scanning tools and reducing the skill level required for exploitation.
The impact of this vulnerability extends beyond immediate system compromise as it provides attackers with persistent access to email infrastructure that can be used for further reconnaissance and lateral movement within networks. Organizations using affected MailEnable versions face potential data breaches, email spoofing, spam relay capabilities, and complete server compromise. The vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1059.007 for command and scripting interpreter usage, as compromised systems can be used to execute malicious commands and scripts. Security professionals should note that this vulnerability predates many modern security controls and defensive measures, making affected systems particularly vulnerable to exploitation in environments where patch management is not properly implemented.
Mitigation strategies for this vulnerability require immediate patching of MailEnable software to versions that address the buffer overflow in the IMAP authentication handling. Organizations should also implement network segmentation to limit access to IMAP services, deploy intrusion detection systems to monitor for suspicious AUTHENTICATE command patterns, and consider disabling unnecessary IMAP services when not required. The vulnerability demonstrates the importance of proper input validation and memory safety practices in server applications, aligning with security standards that emphasize defensive programming techniques and the principle of least privilege in service configuration.