CVE-2007-4748 in PPStream
Summary
by MITRE
Buffer overflow in the PowerPlayer.dll ActiveX control in PPStream 2.0.1.3829 allows remote attackers to execute arbitrary code via a long Logo parameter.
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Analysis
by VulDB Data Team • 10/03/2024
The vulnerability identified as CVE-2007-4748 represents a critical buffer overflow flaw within the PowerPlayer.dll ActiveX control component of PPStream media player version 2.0.1.3829. This vulnerability resides in the handling of the Logo parameter, which is processed through the ActiveX control interface that enables web-based multimedia playback functionality. The flaw manifests when an attacker crafts a specially designed malicious web page that passes an excessively long Logo parameter value to the vulnerable ActiveX control, causing memory corruption that can be exploited to execute arbitrary code on the target system.
The technical implementation of this vulnerability follows the classic buffer overflow pattern where insufficient input validation allows an attacker to overwrite adjacent memory locations in the application's memory space. The PowerPlayer.dll ActiveX control lacks proper bounds checking when processing the Logo parameter, which typically expects a string value representing a logo image or identifier. When an attacker supplies a Logo parameter exceeding the allocated buffer size, the excess data overflows into adjacent memory regions, potentially corrupting the stack or heap memory structures. This memory corruption can result in the execution of attacker-controlled code with the privileges of the user running the vulnerable application, typically with the security context of the web browser or media player process.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a means to gain unauthorized access to systems running the vulnerable PPStream software. The attack vector leverages web-based delivery mechanisms where users visiting compromised websites or clicking malicious links can be automatically exploited without requiring user interaction beyond normal browsing behavior. This makes the vulnerability particularly dangerous in environments where users frequently visit untrusted websites or where automated exploitation tools can be deployed. The vulnerability affects systems where PPStream 2.0.1.3829 is installed and the PowerPlayer.dll ActiveX control is enabled in web browsers, commonly found in enterprise environments that utilize media streaming solutions or in scenarios where ActiveX controls are permitted.
Security mitigations for this vulnerability require immediate patching of the affected PPStream software to version 2.0.1.3830 or later, which contains the necessary memory boundary checks and input validation fixes. System administrators should also implement browser security configurations that restrict ActiveX control usage or disable ActiveX controls entirely in environments where they are not required for legitimate business operations. Network-based protections can include implementing web application firewalls that monitor for suspicious parameter values and blocking requests that contain excessively long Logo parameters. Additionally, users should be educated about the risks of visiting untrusted websites and the importance of keeping multimedia software updated. From a compliance perspective, this vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and represents a significant concern under ATT&CK technique T1059.007 for execution through scripting, where attackers can leverage the vulnerability to establish persistent access through malicious code execution.
The vulnerability demonstrates the persistent security challenges associated with ActiveX controls in legacy Windows environments, where the lack of modern security features and the prevalence of outdated software creates persistent attack surfaces. Organizations should conduct comprehensive vulnerability assessments to identify all systems running vulnerable versions of PPStream or similar media player software, particularly in environments where ActiveX controls remain enabled. The remediation process should also include monitoring for exploitation attempts through network traffic analysis and endpoint detection systems that can identify suspicious memory access patterns or code execution attempts. This vulnerability serves as a reminder of the importance of maintaining up-to-date software versions and implementing defense-in-depth strategies that reduce the attack surface available to threat actors targeting legacy multimedia applications.