CVE-2015-7243 in WAV to MP3 Converter
Summary
by MITRE
Buffer overflow in Boxoft WAV to MP3 Converter allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted WAV file.
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Analysis
by VulDB Data Team • 11/18/2024
The vulnerability identified as CVE-2015-7243 represents a critical buffer overflow flaw within the Boxoft WAV to MP3 Converter software, a widely used audio conversion utility that processes multimedia files for format transformation. This vulnerability specifically manifests when the application processes maliciously crafted WAV files, creating a scenario where remote attackers can exploit the software's failure to properly validate input data length and boundaries. The flaw resides in the converter's handling of audio file headers and data structures, where insufficient bounds checking allows attackers to overflow memory buffers allocated for processing WAV file data. According to CWE-121, this vulnerability falls under the category of stack-based buffer overflow, where the application fails to enforce proper memory limits when copying data from the input file into internal buffers. The attack vector is particularly concerning as it enables remote exploitation, meaning malicious actors can deliver the crafted WAV file through various network channels without requiring physical access to the target system. The vulnerability's potential for arbitrary code execution places it within the ATT&CK framework's technique T1059.007 for command and scripting interpreter, as successful exploitation could allow attackers to execute malicious code with the privileges of the affected application. When exploited, the buffer overflow causes the application to crash and terminate unexpectedly, resulting in a denial of service condition that disrupts legitimate user operations and potentially provides a foothold for more sophisticated attacks.
The technical implementation of this vulnerability stems from the converter's insufficient validation of WAV file structure elements, particularly the handling of chunk sizes and data offsets within the file headers. Attackers can craft WAV files containing oversized data fields or malformed header structures that exceed the allocated buffer space during processing. The flaw is particularly dangerous because the application does not perform adequate input sanitization or length verification before copying data into fixed-size memory buffers. When the converter attempts to process the malicious file, the excessive data overflows into adjacent memory regions, potentially corrupting program execution flow and allowing attackers to redirect code execution. This type of vulnerability is classified as CWE-787, which describes out-of-bounds write conditions where an application writes data past the boundaries of a fixed-length buffer, often leading to memory corruption and potential code execution. The buffer overflow occurs during the parsing phase when the application reads WAV file metadata and attempts to convert it to MP3 format, making the attack surface particularly broad as any user who processes audio files through this converter becomes potentially vulnerable. The exploitation requires minimal technical skill and can be automated through web-based delivery mechanisms, making it attractive to threat actors seeking widespread impact.
The operational impact of CVE-2015-7243 extends beyond simple denial of service, as it creates opportunities for more severe security breaches and system compromise. Organizations that deploy this converter in environments where users might encounter untrusted audio files face significant risk, including potential unauthorized code execution on systems running the vulnerable software. The vulnerability affects not only individual users but also enterprise environments where audio conversion tools are commonly used for multimedia processing, content management, or digital asset handling. In addition to direct exploitation risks, the vulnerability can serve as a stepping stone for attackers to establish persistent access or escalate privileges within compromised systems. The flaw's remote exploitability means that attackers can target users without requiring local system access, making it particularly dangerous in networked environments. The vulnerability also impacts the availability of legitimate services, as users may inadvertently trigger the buffer overflow when processing files from untrusted sources, leading to service disruption and potential data loss. According to security best practices and industry standards, this type of vulnerability requires immediate attention and remediation to prevent exploitation, as the combination of remote exploitability and potential code execution creates a high-risk scenario for both individual users and enterprise environments.
Mitigation strategies for CVE-2015-7243 must address both immediate protection and long-term security improvements within affected systems. The most effective immediate solution involves applying vendor patches or updates that address the buffer overflow vulnerability through proper input validation and memory boundary checking. Organizations should implement network-based controls such as content filtering and file type validation to prevent users from processing potentially malicious WAV files through the vulnerable converter. Security monitoring should include detection of unusual application behavior or crashes that may indicate exploitation attempts, while endpoint protection solutions should be configured to block execution of the vulnerable application until patches are applied. System administrators should consider implementing application whitelisting policies that restrict execution of untrusted audio conversion tools, particularly those with known vulnerabilities. The vulnerability also highlights the importance of secure coding practices and input validation in multimedia processing applications, emphasizing the need for developers to follow established security guidelines such as those provided by the Open Web Application Security Project. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other multimedia processing tools and applications. Additionally, user education about the risks of processing untrusted audio files and the importance of keeping software updated helps reduce the likelihood of successful exploitation. Organizations should also consider implementing sandboxing mechanisms for audio processing tasks to limit the potential impact of any successful exploitation attempts, and maintain comprehensive incident response procedures to address potential security breaches related to this vulnerability.