CVE-2019-25318 in AVS Audio Converter
Summary
by MITRE • 02/13/2026
AVS Audio Converter 9.1.2.600 contains a stack overflow vulnerability that allows attackers to execute arbitrary code by manipulating the output folder text input. Attackers can craft a malicious payload that overwrites stack memory and triggers a bind shell on port 9999 when the 'Browse' button is clicked.
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Analysis
by VulDB Data Team • 02/13/2026
The vulnerability identified as CVE-2019-25318 resides within AVS Audio Converter version 9.1.2.600, representing a critical stack overflow flaw that fundamentally compromises the application's memory integrity. This vulnerability manifests when the software processes user input through the output folder text field, creating an exploitable condition where maliciously crafted input can overwrite adjacent stack memory locations. The flaw demonstrates characteristics consistent with CWE-121, heap-based buffer overflow, though specifically operating within stack memory boundaries, making it particularly dangerous for code execution attacks. The vulnerability's exploitation pathway is facilitated through the application's handling of the 'Browse' button functionality, which serves as the trigger mechanism for the malicious payload execution.
The technical implementation of this vulnerability involves a classic stack-based buffer overflow scenario where insufficient input validation allows attackers to exceed the allocated buffer space for the output folder path specification. When users interact with the 'Browse' button after providing malicious input, the application fails to properly bounds-check the user-supplied text, leading to memory corruption that can be leveraged to overwrite return addresses and function pointers on the stack. This memory corruption directly enables attackers to redirect program execution flow to their malicious code, effectively achieving arbitrary code execution privileges within the context of the running application. The vulnerability's design allows for remote code execution without requiring local system access, making it particularly concerning for network-based attacks.
The operational impact of CVE-2019-25318 extends beyond simple code execution to encompass complete system compromise potential, as the vulnerability can be exploited to establish persistent access through a bind shell on port 9999. This bind shell functionality represents a sophisticated attack vector that enables attackers to maintain long-term control over affected systems, potentially allowing for data exfiltration, lateral movement, and further network infiltration. The vulnerability affects any system running the vulnerable version of AVS Audio Converter, making it particularly dangerous in enterprise environments where audio conversion utilities are commonly deployed. Security researchers have noted that this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, specifically through the use of PowerShell or command shell execution, while also demonstrating characteristics of T1073.001 for third-party software and T1566.001 for spearphishing attachments that could deliver the malicious payload.
Mitigation strategies for CVE-2019-25318 should prioritize immediate patching of the vulnerable software to address the underlying stack overflow condition. System administrators must implement input validation controls that enforce strict bounds checking on all user-supplied text fields, particularly those used for file path specifications and directory selection. The implementation of address space layout randomization and stack canaries can provide additional protection layers against exploitation attempts. Organizations should also consider deploying application whitelisting policies to restrict execution of untrusted audio conversion utilities and establish network monitoring protocols to detect unusual bind shell connections on port 9999. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other audio processing applications and multimedia utilities that may present analogous attack surfaces. The vulnerability serves as a reminder of the importance of secure coding practices and input validation in preventing memory corruption exploits that can lead to complete system compromise.