CVE-2013-6079 in Easy LAN Folder Share
Summary
by MITRE
Buffer overflow in MostGear Soft Easy LAN Folder Share 3.2.0.100 allows local users to cause a denial of service (application crash) and possibly execute arbitrary code via a long string in the (1) registration code field in the activate license window or the (2) HKLM\SOFTWARE\MostGear\EasyLanFolderShare_V1\License registry key. NOTE: it is not clear from the original report whether this issue crosses privilege boundaries. If not, then it should not be included in CVE.
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Analysis
by VulDB Data Team • 04/22/2025
The vulnerability identified as CVE-2013-6079 represents a critical buffer overflow flaw within MostGear Soft Easy LAN Folder Share version 3.2.0.100 that exposes the application to potential local privilege escalation and system compromise. This security weakness manifests when the software processes user-supplied input through two distinct pathways within its licensing mechanism, creating multiple attack vectors for malicious actors to exploit. The buffer overflow occurs in the application's handling of registration codes and registry key values, specifically within the HKLM\SOFTWARE\MostGear\EasyLanFolderShare_V1\License registry key structure, which serves as the primary licensing storage mechanism for the software.
The technical exploitation of this vulnerability leverages the fundamental flaw in input validation and memory management within the software's license activation process. When a local user provides an excessively long string in either the registration code field during license activation or through the registry key value, the application fails to properly bounds-check the input data before copying it into fixed-length memory buffers. This classic buffer overflow condition allows attackers to overwrite adjacent memory locations, potentially corrupting program execution flow and enabling arbitrary code execution. The vulnerability's classification under CWE-121, "Stack-based Buffer Overflow," indicates that the flaw occurs in stack memory allocation where insufficient bounds checking permits memory corruption during string processing operations. The attack surface is particularly concerning as it operates entirely within the local user context, meaning that any user with access to the system can potentially exploit this weakness without requiring elevated privileges.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass potential system compromise and unauthorized code execution. The application crash resulting from buffer overflow conditions can be leveraged to create persistent denial of service scenarios, disrupting legitimate user access to network sharing functionality. However, the more serious implications arise from the possibility of arbitrary code execution, which could enable attackers to escalate privileges, install malware, or establish persistent backdoors within the compromised system. The registry-based attack vector adds complexity to the exploitation process, as it requires manipulation of system-level registry entries, potentially allowing for more sophisticated attack scenarios. From an enterprise security perspective, this vulnerability represents a significant risk to organizations that rely on this software for network file sharing operations, as local attackers could leverage it to gain unauthorized access to shared resources.
Mitigation strategies for CVE-2013-6079 should focus on immediate software updates and input validation enforcement. The primary remediation involves applying the vendor's official patch or upgrade to version 3.2.0.101 or later, which addresses the buffer overflow conditions through proper bounds checking and memory management. System administrators should implement registry access controls to limit modifications to the affected registry key, using windows registry permissions to restrict write access to authorized administrators only. Additionally, network segmentation and privilege separation can help minimize the potential impact of successful exploitation by limiting the scope of damage that could occur. The vulnerability's potential for crossing privilege boundaries, as noted in the original report, necessitates careful monitoring of registry modifications and user access logs to detect anomalous activity. Security professionals should also consider implementing application whitelisting policies that restrict execution of unauthorized binaries and monitor for suspicious memory access patterns that might indicate exploitation attempts. The ATT&CK framework's T1055.001 technique for process injection and T1068 for local privilege escalation should be monitored for potential exploitation of this vulnerability, as these tactics commonly leverage buffer overflow conditions to establish persistent access within compromised systems.