CVE-2009-4759 in BMXPlay
Summary
by MITRE
Buffer overflow in BrotherSoft BMXPlay 0.4.4b allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long string in a .BMX file.
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Analysis
by VulDB Data Team • 05/03/2026
The vulnerability identified as CVE-2009-4759 represents a critical buffer overflow flaw within BrotherSoft BMXPlay version 0.4.4b, a media playback application designed for handling specific multimedia file formats. This issue arises from inadequate input validation mechanisms within the software's parsing logic for .BMX files, which are proprietary multimedia containers used by BrotherSoft's imaging and printing solutions. The flaw exists in the application's handling of user-supplied data during file processing, creating an exploitable condition that can be triggered through maliciously crafted input.
The technical implementation of this vulnerability stems from improper bounds checking within the BMXPlay application's file parser. When processing a .BMX file containing an excessively long string parameter, the application fails to validate the input length against predetermined buffer size limitations. This oversight allows attackers to overwrite adjacent memory locations in the application's runtime stack or heap, potentially leading to unpredictable application behavior. The vulnerability manifests as a classic stack-based buffer overflow when the software attempts to copy user-controlled data into a fixed-length buffer without proper boundary verification, a weakness commonly classified under CWE-121 in the Common Weakness Enumeration catalog.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable remote code execution, making it particularly dangerous for environments where the affected application processes untrusted multimedia content. An attacker could craft a malicious .BMX file containing an oversized string payload that, when opened by an unsuspecting user, would trigger the buffer overflow condition. The resulting application crash could be exploited to redirect execution flow through carefully crafted malicious input, potentially allowing arbitrary code execution with the privileges of the affected user. This capability aligns with attack patterns documented in the MITRE ATT&CK framework under the execution and privilege escalation domains.
Mitigation strategies for CVE-2009-4759 should prioritize immediate patching of the affected BrotherSoft BMXPlay application to version 0.4.4c or later, which includes proper input validation and bounds checking mechanisms. Organizations should implement network segmentation to limit access to systems running the vulnerable software and establish strict file validation policies for multimedia content processing. Additionally, security awareness training should emphasize the dangers of opening untrusted multimedia files, while application whitelisting solutions can help prevent execution of unauthorized software versions. The vulnerability demonstrates the importance of input validation in preventing memory corruption exploits and aligns with industry best practices for secure coding as outlined in the OWASP Top Ten and CERT/CC secure coding guidelines.