CVE-2025-61864 in V-SFT
Summary
by MITRE • 10/10/2025
A use after free vulnerability exists in VS6ComFile!load_link_inf of V-SFT v6.2.7.0 and earlier. Opening specially crafted V-SFT files may lead to information disclosure, affected system's abnormal end (ABEND), and arbitrary code execution.
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Analysis
by VulDB Data Team • 10/10/2025
The vulnerability identified as CVE-2025-61864 represents a critical use after free flaw within the VS6ComFile component of V-SFT version 6.2.7.0 and earlier installations. This issue resides in the load_link_inf function which processes V-SFT file formats, creating a dangerous condition where memory previously allocated to a data structure is accessed after it has been freed by the application's memory management system. The vulnerability manifests when the software encounters specially crafted V-SFT files that trigger improper memory handling during file parsing operations. This particular flaw falls under the CWE-416 category of use after free conditions, which is classified as a serious memory safety issue that can lead to arbitrary code execution and system compromise. The vulnerability is particularly concerning as it affects a file processing component that could be exploited through various attack vectors including email attachments, file downloads, or network shares containing maliciously crafted V-SFT files.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious V-SFT file that, when opened by the vulnerable software, causes the load_link_inf function to free a memory block while still maintaining references to it. During subsequent operations, the application attempts to access this freed memory location, leading to unpredictable behavior including information disclosure, system crashes, or potentially full system compromise. The memory corruption that results from this use after free condition can be leveraged by attackers to execute arbitrary code within the context of the vulnerable application, potentially allowing for privilege escalation or complete system control. This type of vulnerability is particularly dangerous in enterprise environments where V-SFT files might be processed automatically or through automated workflows, amplifying the potential impact of exploitation.
The operational impact of CVE-2025-61864 extends beyond simple system instability to encompass serious security implications including unauthorized information disclosure and potential remote code execution capabilities. When exploited successfully, the vulnerability can cause affected systems to experience abnormal end (ABEND) conditions, leading to service disruption and potential data loss. The information disclosure aspect of this vulnerability means that attackers could potentially extract sensitive data from memory locations that should remain protected, including credentials, personal information, or proprietary data. Organizations running vulnerable versions of V-SFT software face significant risk of compromise, particularly in environments where automated file processing or file sharing occurs. The vulnerability's exploitation potential aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute malicious code within the application's execution context, potentially leading to persistent access or lateral movement within the network.
Mitigation strategies for CVE-2025-61864 should prioritize immediate software updates to versions that contain patches addressing the use after free condition in the VS6ComFile component. Organizations should implement strict file validation procedures for V-SFT files, particularly those received from untrusted sources, and consider deploying sandboxing solutions to isolate file processing operations. Network segmentation and access controls should be implemented to limit the potential impact of successful exploitation attempts. Security monitoring should include detection of unusual file processing activities or system crashes that could indicate exploitation attempts. Additionally, organizations should conduct vulnerability assessments to identify all systems running vulnerable versions of V-SFT software and establish incident response procedures specifically addressing use after free vulnerabilities. Regular security awareness training for personnel handling file attachments and downloads can help reduce the risk of successful social engineering attacks that might deliver malicious V-SFT files. The remediation process should also include thorough testing of patches in controlled environments before widespread deployment to ensure compatibility and prevent unintended service disruptions.