CVE-2007-4599 in RealPlayer
Summary
by MITRE
Stack-based buffer overflow in RealNetworks RealPlayer 10 and possibly 10.5, and RealOne Player 1 and 2, for Windows allows remote attackers to execute arbitrary code via a crafted playlist (PLS) file.
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Analysis
by VulDB Data Team • 07/29/2019
The vulnerability identified as CVE-2007-4599 represents a critical stack-based buffer overflow affecting RealNetworks RealPlayer versions 10 and 10.5, as well as RealOne Player versions 1 and 2 on Windows platforms. This flaw resides in the handling of playlist files with the .pls extension, which are commonly used to organize and stream multimedia content. The vulnerability stems from insufficient bounds checking when processing maliciously crafted playlist data, creating an exploitable condition that can be triggered remotely through network-based attacks.
The technical implementation of this vulnerability occurs when the affected media player processes a specially constructed playlist file containing excessive data in specific fields. The buffer overflow manifests in the stack memory region where the application fails to validate the length of input data before copying it into fixed-size buffers. This allows attackers to overwrite adjacent memory locations including return addresses and control data structures, effectively corrupting the program execution flow. The flaw falls under CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits memory corruption.
From an operational perspective, this vulnerability presents a significant threat to enterprise and individual users alike, as it enables remote code execution without requiring any local privileges or user interaction beyond opening a malicious playlist file. Attackers can leverage this vulnerability to gain complete control over affected systems, potentially installing backdoors, stealing sensitive data, or using compromised machines as launching points for further attacks. The attack vector is particularly dangerous because it can be delivered through various means including email attachments, web downloads, or malicious websites, making it highly accessible to threat actors with minimal technical expertise.
The security implications extend beyond immediate exploitation, as this vulnerability aligns with several tactics outlined in the MITRE ATT&CK framework under the execution and privilege escalation domains. Once successfully exploited, attackers can establish persistent access through the installed malicious payloads, potentially maintaining long-term control over compromised systems. The vulnerability also demonstrates the importance of input validation and memory safety practices in multimedia applications, highlighting how seemingly benign file format processing can become a critical security weakness.
Organizations and users should immediately implement mitigations including applying the vendor-provided security patches, disabling automatic playlist execution, and implementing network-based controls to prevent access to potentially malicious playlist files. System administrators should consider network segmentation and monitoring to detect unusual traffic patterns that might indicate exploitation attempts. Additionally, the vulnerability underscores the necessity of regular security updates and the importance of avoiding outdated software versions that may contain unpatched security flaws. The incident serves as a reminder of the critical need for robust software security practices throughout the development lifecycle, particularly for applications that process external data inputs such as media players and multimedia frameworks.