CVE-2005-3526 in Ipswitch Collaboration Suite
Summary
by MITRE
Buffer overflow in the IMAP daemon in Ipswitch Collaboration Suite 2006.02 and earlier allows remote authenticated users to execute arbitrary code via a long FETCH command.
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Analysis
by VulDB Data Team • 06/15/2019
The vulnerability described in CVE-2005-3526 represents a critical buffer overflow flaw within the IMAP daemon component of Ipswitch Collaboration Suite version 2006.02 and earlier releases. This security weakness specifically targets the mail server's IMAP service implementation, which is a fundamental protocol for accessing email messages stored on remote servers. The vulnerability arises from insufficient input validation mechanisms within the FETCH command processing functionality, creating an exploitable condition that can be leveraged by authenticated remote attackers to gain unauthorized code execution privileges on the affected system.
The technical implementation of this buffer overflow occurs when the IMAP daemon receives a specially crafted FETCH command containing excessive data that exceeds the allocated buffer space. This condition violates the fundamental principle of memory safety and can lead to unpredictable behavior including application crashes, memory corruption, or complete system compromise. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, where the attacker can manipulate the program's execution flow by overwriting adjacent memory locations including return addresses and function pointers. The attack requires only authenticated access to the IMAP service, making it particularly dangerous as it can be exploited by legitimate users who have valid credentials, potentially escalating privileges from standard user access to full system control.
From an operational impact perspective, this vulnerability presents significant risks to organizations relying on Ipswitch Collaboration Suite for their email infrastructure. The remote execution capability allows attackers to install backdoors, modify email content, access sensitive communications, or establish persistent access to the compromised system. The vulnerability affects the integrity and availability of email services, potentially leading to data breaches, service disruption, and unauthorized access to confidential information. Security analysts should consider this weakness in relation to the ATT&CK framework's privilege escalation and command and control tactics, as successful exploitation can enable attackers to move laterally within networks and maintain persistent access to target environments.
Mitigation strategies for CVE-2005-3526 should prioritize immediate patching of the Ipswitch Collaboration Suite to version 2006.03 or later, which contains the necessary security fixes addressing the buffer overflow condition. Network segmentation and access controls should be implemented to limit exposure of the IMAP service to only authorized users and systems. Monitoring for suspicious FETCH command patterns and unusual authentication activities can help detect potential exploitation attempts. Organizations should also implement regular vulnerability assessments and penetration testing to identify similar memory corruption vulnerabilities in other legacy email systems. Additionally, security teams should consider implementing intrusion detection systems that can identify and alert on malformed IMAP commands that may indicate exploitation attempts, while maintaining proper log retention for forensic analysis and compliance requirements.