CVE-2007-6732 in Extended Module Player
Summary
by MITRE
Multiple buffer overflows in the dtt_load function in loaders/dtt_load.c Extended Module Player (XMP) 2.5.1 and earlier allow remote attackers to execute arbitrary code via unspecified vectors related to an untrusted length value and the (1) pofs and (2) plen arrays.
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Analysis
by VulDB Data Team • 08/22/2021
The vulnerability identified as CVE-2007-6732 represents a critical buffer overflow condition within the Extended Module Player (XMP) media player software version 2.5.1 and earlier. This flaw exists in the dtt_load function located within the loaders/dtt_load.c source file, making it a significant security concern for systems that process or handle module music files. The vulnerability manifests when the application processes specially crafted input data that contains maliciously constructed length values, creating conditions where memory boundaries are exceeded during data processing operations.
The technical implementation of this vulnerability involves two distinct array structures within the affected codebase: the pofs and plen arrays that are manipulated during the module loading process. These arrays are populated with untrusted length values that are not properly validated or sanitized before being used to determine buffer allocation sizes. When attackers supply malicious input containing oversized length values, the application fails to perform adequate bounds checking, allowing subsequent memory operations to overwrite adjacent memory regions. This classic buffer overflow condition creates opportunities for arbitrary code execution, as the overflow can potentially overwrite critical program control structures such as return addresses or function pointers.
From an operational perspective, this vulnerability presents a severe risk to systems that utilize XMP for processing audio modules, particularly those that handle untrusted input from remote sources. The remote attack vector means that adversaries can exploit this flaw without requiring local access to the target system, making it particularly dangerous in networked environments. Systems that automatically process or download module files from untrusted sources become vulnerable to exploitation, as the buffer overflow can be triggered during normal file loading operations. The impact extends beyond simple code execution to potentially allow complete system compromise, depending on the execution environment and available privileges.
The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of improper input validation in memory management operations. From an ATT&CK framework perspective, this vulnerability maps to techniques involving code injection and privilege escalation, as the successful exploitation can lead to arbitrary code execution with the privileges of the affected application. The attack surface is particularly concerning given that XMP is widely used in various media applications and game engines that process module files, potentially affecting numerous downstream applications that depend on this library for audio processing capabilities.
Mitigation strategies should prioritize immediate patching of affected systems to XMP versions 2.5.2 or later, which contain the necessary fixes for the buffer overflow conditions. System administrators should implement input validation measures to prevent processing of suspicious module files, particularly those from untrusted sources. Network segmentation and access controls can help limit the potential impact of exploitation attempts, while application whitelisting can prevent unauthorized execution of vulnerable versions. Regular security assessments and vulnerability scanning should be conducted to identify any remaining instances of the vulnerable software, and organizations should maintain updated threat intelligence to monitor for exploitation attempts targeting this specific vulnerability.