CVE-2019-25331 in AVS Audio Converter
Summary
by MITRE • 02/13/2026
AVS Audio Converter 9.1 contains a local buffer overflow vulnerability that allows local attackers to overwrite CPU registers by manipulating the 'Exit folder' input field. Attackers can craft a specially designed text file with 264 bytes of padding followed by register overwrite values to compromise the application and potentially execute arbitrary code.
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Analysis
by VulDB Data Team • 02/13/2026
The vulnerability identified as CVE-2019-25331 represents a critical local buffer overflow flaw within AVS Audio Converter version 9.1 that demonstrates a classic software security weakness with severe operational implications. This vulnerability resides in the application's handling of user input within the 'Exit folder' configuration field, where insufficient bounds checking permits attackers to manipulate memory allocation patterns and overwrite critical processor registers. The flaw manifests when the application processes specially crafted input data that exceeds the allocated buffer space, creating a condition where adjacent memory locations become accessible for modification through controlled data injection.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient boundary checks allow attackers to overwrite adjacent memory locations including return addresses and CPU registers. The specific exploitation technique requires attackers to prepare a text file containing exactly 264 bytes of padding followed by carefully constructed register overwrite values that can manipulate the program execution flow. This precise padding requirement indicates that the vulnerability operates through a predictable memory layout where the buffer overflow directly impacts the processor's register state, potentially allowing for privilege escalation or code execution within the application's security context.
From an operational security perspective, this vulnerability creates a significant risk for local attackers who can leverage the buffer overflow to gain control over the application's execution flow and potentially execute arbitrary code with the privileges of the running process. The attack vector requires local system access but does not necessitate network connectivity, making it particularly dangerous in environments where local privilege escalation opportunities exist. The vulnerability's impact extends beyond simple application compromise as the overwritten registers can be manipulated to redirect execution flow to attacker-controlled code segments, potentially enabling privilege escalation to system-level access depending on the application's execution context and user permissions.
The security implications of this vulnerability align with ATT&CK technique T1068, which covers 'Local Privilege Escalation' through the exploitation of software vulnerabilities, and T1059, which addresses 'Command and Scripting Interpreter' where malicious code execution can occur through manipulated application inputs. Organizations using AVS Audio Converter 9.1 should implement immediate mitigations including disabling the affected input field, applying vendor patches when available, and implementing input validation controls to prevent similar vulnerabilities from being exploited. System administrators should also consider monitoring for unusual process behavior and implementing application whitelisting controls to prevent unauthorized execution of potentially vulnerable software components. The vulnerability demonstrates the critical importance of proper input validation and memory management practices in preventing local privilege escalation attacks that can compromise entire system environments through seemingly benign application interfaces.