CVE-2013-6935 in Watermark Master
Summary
by MITRE
Buffer overflow in VideoCharge Software Watermark Master 2.2.23 allows remote attackers to execute arbitrary code via a long string in the SourcePath value in a .wcf file.
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Analysis
by VulDB Data Team • 06/10/2025
The vulnerability identified as CVE-2013-6935 represents a critical buffer overflow flaw within VideoCharge Software Watermark Master version 2.2.23. This software application, designed for video editing and watermarking operations, contains a programming error that manifests when processing specially crafted .wcf configuration files. The vulnerability specifically occurs during the handling of the SourcePath parameter within these files, where an insufficient input validation mechanism fails to properly check the length of user-supplied data before copying it into a fixed-size buffer structure.
The technical implementation of this vulnerability stems from improper bounds checking in the application's file parsing routine. When a maliciously crafted .wcf file containing an excessively long string in the SourcePath field is processed, the software attempts to store this data in a predetermined memory buffer without adequate size verification. This condition creates a classic buffer overflow scenario where the excessive data overflows into adjacent memory locations, potentially corrupting program execution flow and allowing attackers to overwrite critical memory segments including return addresses and function pointers. The vulnerability falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow conditions that occur when insufficient bounds checking is performed on data copied to fixed-size buffers.
From an operational perspective, this vulnerability presents a significant remote code execution risk that can be exploited by attackers without requiring local system access. The attack vector requires only that a victim open or process a maliciously crafted .wcf file, making it particularly dangerous in environments where users frequently handle third-party configuration files or where automated processing of such files occurs. The implications extend beyond simple code execution, as successful exploitation could enable attackers to gain complete control over the affected system, potentially leading to data breaches, privilege escalation, or deployment of additional malware. The vulnerability aligns with the MITRE ATT&CK framework under the technique T1059.007 for command and scripting interpreter, as exploitation would likely involve executing malicious code through the compromised application environment.
Mitigation strategies for CVE-2013-6935 should focus on immediate software updates and patches provided by VideoCharge Software, as the vendor would have addressed the buffer overflow condition through proper input validation and bounds checking mechanisms. Organizations should implement strict file validation policies that prevent processing of untrusted .wcf files, particularly those received from external sources or unknown origins. Network-based defenses could include content filtering solutions that scan for potentially malicious file characteristics and prevent automatic execution of configuration files. Additionally, system hardening measures such as address space layout randomization and data execution prevention should be enabled to make exploitation more difficult even if the underlying vulnerability remains unpatched. Security monitoring should specifically track unusual file processing activities and potential attempts to load malformed configuration files that could trigger buffer overflow conditions.