CVE-2011-4245 in RealPlayer
Summary
by MITRE
The RealVideo renderer in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors.
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Analysis
by VulDB Data Team • 11/26/2021
The vulnerability identified as CVE-2011-4245 represents a critical security flaw within the RealVideo renderer component of RealNetworks RealPlayer software across multiple platforms and versions. This vulnerability affects both Windows and Mac operating systems with specific version constraints where RealPlayer versions prior to 15.0.0 and Mac RealPlayer versions prior to 12.0.0.1703 are considered vulnerable. The flaw manifests within the multimedia rendering engine responsible for processing and displaying RealVideo content, creating potential attack vectors that could be exploited by malicious actors.
The technical nature of this vulnerability involves memory corruption issues that occur during the processing of specially crafted video content within the RealVideo renderer. These memory corruption flaws typically arise from insufficient input validation and improper handling of malformed multimedia data structures. When the renderer encounters maliciously crafted video files or streams, the processing logic fails to properly manage memory allocation and deallocation, leading to buffer overflows, heap corruption, or other memory management errors. Such conditions create opportunities for attackers to manipulate the program execution flow and potentially inject malicious code into the running process.
The operational impact of CVE-2011-4245 extends beyond simple denial of service scenarios to encompass full arbitrary code execution capabilities. Attackers exploiting this vulnerability can remotely execute malicious code with the privileges of the affected user, potentially leading to complete system compromise. The memory corruption aspects of this vulnerability align with common attack patterns described in the CWE (Common Weakness Enumeration) catalog under weakness categories related to memory safety issues and buffer overflows. This vulnerability also maps to several ATT&CK (Attack Tree Knowledge) techniques including execution through malicious file attachments, privilege escalation, and persistence mechanisms that attackers might leverage after initial compromise.
The attack surface for this vulnerability is particularly concerning given the widespread deployment of RealPlayer across enterprise and consumer environments. The unspecified vectors mentioned in the original description suggest that multiple attack paths could be exploited, potentially including web-based attacks through browser plugins, email attachments, or direct network-based exploitation. Security researchers have noted that multimedia processing components often represent high-value targets due to their complex code bases and the necessity of handling untrusted input from various sources, making them prime candidates for sophisticated exploitation techniques that could leverage the memory corruption vulnerabilities described in this CVE.
Organizations affected by this vulnerability should prioritize immediate remediation through official patches provided by RealNetworks, as the potential for remote code execution makes this a critical security concern. The mitigation strategy should include comprehensive vulnerability assessment across all systems running affected RealPlayer versions, followed by immediate patch deployment and monitoring for any signs of exploitation attempts. Additionally, network segmentation and application whitelisting policies should be implemented to limit the potential impact of any successful exploitation attempts, while regular security updates and patch management processes should be reinforced to prevent similar vulnerabilities from arising in the future.