CVE-2006-4057 in Eremove
Summary
by MITRE
Buffer overflow in the preview_create function in gui.cpp in Mitch Murray Eremove 1.4 allows remote attackers to cause a denial of service (application crash), and possibly execute arbitrary code, via a large email attachment.
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Analysis
by VulDB Data Team • 03/26/2019
The vulnerability identified as CVE-2006-4057 represents a critical buffer overflow flaw within the Mitch Murray Eremove 1.4 email client software. This issue specifically affects the preview_create function located in the gui.cpp source file, which is responsible for generating preview windows for email attachments. The buffer overflow occurs when processing email attachments that exceed normal size parameters, creating a potential attack vector for remote exploitation. The flaw demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. This vulnerability directly impacts the application's memory management and can lead to unpredictable behavior including crashes and potential code execution.
The technical implementation of this vulnerability stems from inadequate input validation within the email preview functionality. When a remote attacker crafts a malicious email with an oversized attachment, the preview_create function fails to properly validate the attachment size before attempting to process it. This lack of size validation creates a condition where the buffer allocated for attachment preview data can be exceeded, causing memory corruption that may result in application termination or arbitrary code execution. The flaw operates at the application layer and requires no authentication or privileged access to exploit, making it particularly dangerous for email clients that automatically process attachments. This vulnerability aligns with ATT&CK technique T1203, which covers exploitation of software vulnerabilities for privilege escalation and code execution.
The operational impact of CVE-2006-4057 extends beyond simple denial of service to potentially enable remote code execution on affected systems. When the vulnerable application processes a maliciously crafted email attachment, the buffer overflow can corrupt critical memory segments including return addresses, function pointers, or other executable code locations. This memory corruption can result in immediate application crashes or provide attackers with opportunities to inject and execute malicious code with the privileges of the affected application. The vulnerability affects systems running Mitch Murray Eremove 1.4, which would typically be email clients processing incoming messages from untrusted sources. Organizations relying on this software for email management face significant risk of unauthorized access or system compromise through this vector. The vulnerability's remote exploitability means that attackers can target users without requiring physical access to the system or direct network interaction beyond sending the malicious email.
Mitigation strategies for CVE-2006-4057 should prioritize immediate software updates and patches from the vendor, as the vulnerability represents an unpatched flaw in version 1.4 of the email client. System administrators should implement email filtering mechanisms to block suspicious attachments and enforce strict size limitations on incoming email content. Network-based intrusion detection systems should be configured to monitor for patterns associated with potential exploitation attempts, particularly those involving oversized email attachments. Additionally, organizations should consider implementing email client security measures such as sandboxing email previews and disabling automatic preview generation for unknown or untrusted senders. The vulnerability demonstrates the importance of proper input validation and bounds checking in software development practices, aligning with security standards that emphasize defensive programming techniques. Regular security assessments and vulnerability scanning should be conducted to identify similar buffer overflow conditions in other email processing applications and ensure comprehensive protection against similar threats.