CVE-2008-6447 in Easymail Mailstore Object
Summary
by MITRE
Buffer overflow in emmailstore.dll 6.5.0.3 in the QuikSoft EasyMail MailStore ActiveX control allows remote attackers to execute arbitrary code via a long first argument to the CreateStore method.
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Analysis
by VulDB Data Team • 05/24/2025
The vulnerability identified as CVE-2008-6447 represents a critical buffer overflow flaw within the emmailstore.dll component of QuikSoft EasyMail MailStore ActiveX control version 6.5.0.3. This issue resides in the CreateStore method which fails to properly validate input parameters, specifically the first argument that is processed without adequate bounds checking. The flaw enables remote attackers to craft malicious input that exceeds the allocated buffer space, leading to memory corruption that can be exploited to execute arbitrary code on vulnerable systems. The ActiveX control architecture inherently presents significant security risks as it operates within the context of web browsers and desktop applications, making it a prime target for exploitation through web-based attack vectors.
The technical implementation of this vulnerability stems from improper input validation within the CreateStore method of the emmailstore.dll library. When a remote attacker provides an excessively long string as the first argument to this method, the buffer allocated for processing this parameter becomes overflowed. This buffer overflow occurs because the application does not perform adequate length checks or use safe string handling functions that would prevent the overflow condition. The flaw aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient space is allocated for data, and also corresponds to CWE-122, which addresses heap-based buffer overflows. The vulnerability demonstrates characteristics consistent with the attack patterns documented in the MITRE ATT&CK framework under the T1059.007 technique for Command and Scripting Interpreter, as successful exploitation would allow attackers to execute arbitrary commands on the target system.
The operational impact of CVE-2008-6447 extends beyond simple code execution as it represents a severe privilege escalation vector that can compromise entire systems. Attackers exploiting this vulnerability can gain unauthorized access to systems running vulnerable versions of the EasyMail MailStore ActiveX control, potentially leading to full system compromise. The remote nature of the attack means that exploitation can occur without requiring local access to the target system, making it particularly dangerous in enterprise environments where ActiveX controls are often deployed for email processing functionality. Systems that utilize this control for automated email storage operations become vulnerable to attack, potentially allowing threat actors to intercept sensitive communications or establish persistent access points within network infrastructure. The vulnerability affects organizations that have not updated their email infrastructure or patched the specific ActiveX control, creating a persistent security risk that can be leveraged for data exfiltration, lateral movement, or other malicious activities.
Mitigation strategies for CVE-2008-6447 should prioritize immediate remediation through vendor-supplied patches and updates to the QuikSoft EasyMail MailStore ActiveX control. Organizations must ensure that all instances of the vulnerable component are updated to versions that address the buffer overflow condition through proper input validation and bounds checking. System administrators should also implement network-level protections such as disabling ActiveX controls in web browsers where possible, or restricting access to specific ActiveX components through group policy configurations. The implementation of application whitelisting policies can prevent execution of untrusted ActiveX controls, while network segmentation can limit the potential impact of successful exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of the vulnerable control within the enterprise environment, as the complexity of legacy systems often results in multiple installations that may not be immediately apparent. Additionally, organizations should consider implementing intrusion detection systems that can identify exploitation attempts targeting known ActiveX vulnerabilities, providing early warning capabilities for potential attacks.