CVE-2009-3969 in Faslo Player
Summary
by MITRE
Stack-based buffer overflow in Faslo Player 7.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long string in a .m3u playlist file.
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Analysis
by VulDB Data Team • 12/09/2024
The vulnerability identified as CVE-2009-3969 represents a critical stack-based buffer overflow flaw within Faslo Player version 7.0 that exposes the application to remote exploitation. This issue specifically manifests when the vulnerable media player processes malformed .m3u playlist files containing excessively long strings, creating a condition where attacker-controlled input can overwrite adjacent memory locations on the stack. The flaw resides in the player's insufficient input validation mechanisms when parsing playlist metadata, particularly within the string handling routines that process URI references and metadata fields. Such buffer overflow conditions are classified under CWE-121 as stack-based buffer overflow, where the overflow occurs in stack memory allocated for local variables and function call information.
The operational impact of this vulnerability extends beyond simple denial of service to potentially enable remote code execution, making it a significant security risk for systems that process untrusted media content. When an attacker crafts a malicious .m3u playlist file with an oversized string parameter, the player's parsing routine fails to enforce proper bounds checking, allowing the input to overwrite critical stack memory regions including return addresses and local variables. This memory corruption can lead to unpredictable application behavior, resulting in crashes that constitute denial of service, or more severely, allow attackers to manipulate the program execution flow to inject and execute arbitrary code within the context of the running player process. The vulnerability affects systems where Faslo Player is installed and used to process playlist files, particularly in environments where users might encounter or download untrusted media content from web sources or peer-to-peer networks.
The exploitation of CVE-2009-3969 aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to initial access and execution phases where adversaries leverage software vulnerabilities to gain system control. Attackers can deploy this vulnerability through social engineering campaigns that distribute malicious .m3u playlist files, often disguised as legitimate media playlists, to unsuspecting users. The attack chain typically begins with the delivery of the malicious file through compromised websites, email attachments, or file sharing networks, followed by automatic or user-triggered execution of the vulnerable player application. This vulnerability demonstrates the importance of input validation and memory safety practices in multimedia applications, as the flaw directly relates to improper handling of user-supplied data without adequate bounds checking or sanitization. Security professionals should note that this type of vulnerability commonly appears in legacy media players and multimedia frameworks that were not designed with modern security practices in mind, making them prime targets for exploitation in environments where older software versions persist.
Mitigation strategies for CVE-2009-3969 require immediate remediation through software updates and patches provided by the vendor, as well as network-level defenses to prevent the distribution of malicious playlist files. Organizations should implement strict file type validation and content scanning procedures for media files, particularly those originating from untrusted sources, to prevent automatic execution of potentially malicious playlist files. Additionally, system administrators should consider implementing application whitelisting policies that restrict execution of known vulnerable applications or enforce sandboxing measures for media processing activities. The vulnerability highlights the necessity of regular security assessments and patch management procedures, as Faslo Player 7.0 represents an outdated software version that likely lacks modern security features such as stack canaries, address space layout randomization, and other exploit mitigation techniques. Network segmentation and user access controls should be enforced to limit the potential impact of successful exploitation, while incident response procedures should be established to quickly identify and contain any exploitation attempts targeting this specific vulnerability.