CVE-2009-5075 in Audio
Summary
by MITRE
Monkey s Audio before 4.02 allows remote attackers to cause a denial of service (application crash) via a malformed APE file.
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Analysis
by VulDB Data Team • 02/09/2019
The vulnerability identified as CVE-2009-5075 affects Monkey s Audio software version 4.02 and earlier, presenting a significant denial of service risk through malformed APE file manipulation. This issue resides within the audio compression and decompression processing pipeline where the application fails to properly validate input file structures before attempting to parse them. The flaw represents a classic buffer over-read or improper input validation vulnerability that can be exploited by remote attackers to crash the targeted application. The APE file format, which stands for Monkey s Audio, is a lossless audio compression format designed for efficient storage and playback of high-quality audio files. The vulnerability specifically targets the parser component responsible for interpreting APE file headers and metadata structures, where insufficient boundary checking allows maliciously crafted file content to trigger unexpected application behavior. This type of vulnerability falls under the CWE-125 weakness category, which describes out-of-bounds read conditions that occur when an application attempts to read data beyond the boundaries of a buffer or array. The attack vector is particularly concerning as it requires no authentication or privilege escalation, making it accessible to any remote attacker who can deliver a malicious APE file to a vulnerable system. The operational impact extends beyond simple service disruption, as this vulnerability could be leveraged as part of a broader attack chain where initial compromise might occur through other means, but the application crash serves as an effective denial of service mechanism that can prevent legitimate users from accessing audio processing capabilities.
The technical exploitation of CVE-2009-5075 demonstrates how improper input validation can lead to application instability and complete service unavailability. When a malformed APE file is processed by the vulnerable Monkey s Audio software, the parser encounters unexpected data structures that cause it to attempt memory access operations beyond allocated buffer boundaries. This typically results in segmentation faults or access violations that cause the application to terminate unexpectedly. The vulnerability is particularly dangerous because APE files are commonly used in multimedia applications and audio processing workflows, making the attack surface broad and potentially impactful for media servers, audio editing workstations, and streaming applications. The attack pattern aligns with ATT&CK technique T1499.004, which covers network denial of service attacks through application or service manipulation. The flaw likely stems from inadequate error handling within the file format parsing routine, where the software does not properly validate the length fields in APE file headers before attempting to read associated data blocks. This type of vulnerability is often classified as a software defect in the input validation layer, where the system assumes all input conforms to expected formats without proper sanitization checks. The vulnerability could be exploited in various scenarios including web-based audio processing services, automated media conversion systems, or any application that accepts and processes APE files from untrusted sources.
Mitigation strategies for CVE-2009-5075 should focus on both immediate remediation and long-term architectural improvements. The primary solution involves upgrading to Monkey s Audio version 4.02 or later, where the parsing routines have been enhanced to properly validate file structures and handle malformed input gracefully. Organizations should implement comprehensive patch management processes to ensure all vulnerable systems are updated promptly, particularly in environments where audio processing services are exposed to external networks or untrusted users. Additional protective measures include implementing file format validation at network boundaries, deploying content filtering systems that can detect and block suspicious APE files, and establishing robust application sandboxing techniques that limit the impact of potential exploitation attempts. Security monitoring should be enhanced to detect unusual application crash patterns or service disruptions that might indicate exploitation attempts. The vulnerability also highlights the importance of implementing proper input validation frameworks and conducting regular security testing of file processing components. Organizations should consider implementing automated testing procedures that include fuzzing techniques to identify similar parsing vulnerabilities in other multimedia processing components. From a compliance perspective, this vulnerability underscores the need for adherence to security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity frameworks, which emphasize the critical importance of input validation and secure coding practices. The remediation process should also include thorough testing to ensure that the patch does not introduce compatibility issues with legitimate APE files while effectively preventing the denial of service condition.