CVE-2009-2961 in KOL Player
Summary
by MITRE
Stack-based buffer overflow in Thaddy de Konng KOL Player 1.0 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long URL in a .MP3 playlist file.
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Analysis
by VulDB Data Team • 12/08/2024
The vulnerability identified as CVE-2009-2961 represents a critical stack-based buffer overflow flaw within the KOL Player 1.0 media player application. This security weakness specifically affects the handling of playlist files with the .mp3 extension, creating a dangerous condition where remote attackers can manipulate the application's memory structure through carefully crafted input. The vulnerability resides in how the player processes URL strings contained within playlist files, particularly when these URLs exceed the allocated buffer space on the stack. According to the Common Weakness Enumeration framework, this corresponds to CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The flaw manifests when the player attempts to parse and store a URL that exceeds the predetermined buffer capacity, leading to unpredictable memory corruption.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to encompass full arbitrary code execution capabilities. When attackers craft malicious playlist files containing excessively long URLs, the buffer overflow can overwrite critical stack memory regions including return addresses, function pointers, and local variables. This memory corruption allows threat actors to redirect program execution flow and inject malicious code into the target system. The attack vector is particularly concerning because it requires no local privileges or user interaction beyond opening a specially crafted playlist file, making it a classic example of a remote code execution vulnerability that aligns with ATT&CK technique T1203. The vulnerability affects systems running the KOL Player 1.0 application, which was commonly used for multimedia playback in various enterprise and consumer environments, amplifying its potential impact.
The technical exploitation of this vulnerability demonstrates the classic characteristics of stack-based buffer overflow attacks where attackers can leverage the predictable memory layout of the stack to overwrite return addresses and execute arbitrary code. The flaw is particularly dangerous because it operates within the context of media player applications, which often run with elevated privileges when handling multimedia files. Security researchers have documented similar patterns in other media player applications, where playlist parsing functions fail to implement proper input validation and bounds checking. The vulnerability's classification as a remote code execution threat means that attackers can potentially compromise entire systems simply by enticing users to open malicious playlist files, making it a significant concern for organizations with outdated media player software. Organizations should implement immediate mitigations including software updates, network segmentation, and user education to prevent exploitation of this vulnerability.
The remediation approach for CVE-2009-2961 requires a multi-layered strategy that addresses both immediate protection and long-term security posture improvements. System administrators should prioritize patching affected systems by upgrading to newer versions of KOL Player that contain proper bounds checking and input validation mechanisms. The vulnerability highlights the importance of secure coding practices, particularly in applications that process external input through stack-based memory operations. Organizations should also consider implementing network-based protections such as intrusion detection systems that can identify suspicious playlist file patterns and restrict access to known vulnerable applications. Additionally, security awareness training should emphasize the dangers of opening untrusted multimedia files and playlist contents, as social engineering remains a common attack vector for exploiting such vulnerabilities. The incident underscores the critical need for regular security assessments and vulnerability management processes to identify and remediate similar flaws before they can be exploited by malicious actors.