CVE-2007-5081 in RealPlayer
Summary
by MITRE
Heap-based buffer overflow in RealNetworks RealPlayer 8, 10, 10.1, and possibly 10.5; RealOne Player 1 and 2; and RealPlayer Enterprise allows remote attackers to execute arbitrary code via a crafted RM file.
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Analysis
by VulDB Data Team • 07/29/2019
The vulnerability identified as CVE-2007-5081 represents a critical heap-based buffer overflow affecting multiple versions of RealNetworks RealPlayer and RealOne Player software. This flaw exists within the media player's handling of RealMedia (.rm) files, which are commonly used for streaming audio and video content. The vulnerability is particularly concerning because it allows remote attackers to execute arbitrary code on affected systems simply by tricking users into opening a maliciously crafted .rm file. The affected software versions include RealPlayer 8, 10, 10.1, and potentially 10.5, along with RealOne Player 1 and 2, indicating a widespread impact across RealNetworks' media player portfolio. This vulnerability aligns with CWE-122, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent heap memory regions.
The technical implementation of this vulnerability occurs during the parsing of RealMedia file structures, specifically when the software processes certain header fields or metadata within the .rm file format. The heap-based nature of the overflow means that attackers can manipulate heap memory layout to inject and execute malicious code with the privileges of the affected user. This type of vulnerability is particularly dangerous because it can be exploited through various attack vectors including email attachments, web downloads, or malicious websites that serve the crafted .rm files. The attack surface is broad given that RealPlayer was widely distributed and used across enterprise and consumer environments, making it an attractive target for cybercriminals seeking to gain unauthorized system access.
The operational impact of CVE-2007-5081 extends beyond simple code execution, as successful exploitation can lead to complete system compromise and persistent backdoor access. Attackers can leverage this vulnerability to establish unauthorized remote access to vulnerable systems, potentially leading to data theft, system monitoring, or further network infiltration. The vulnerability's remote exploitability means that attackers do not need physical access to target systems, enabling large-scale attacks against multiple victims simultaneously. From an enterprise security perspective, this vulnerability represents a significant risk as RealPlayer installations were common across corporate networks, potentially providing attackers with a vector to move laterally within networks. The vulnerability also maps to several ATT&CK techniques including T1059 for command and scripting interpreter usage and T1068 for exploit for privilege escalation, highlighting the multi-stage attack potential.
Mitigation strategies for CVE-2007-5081 should focus on immediate software patching and deployment of security updates provided by RealNetworks. Organizations should implement network-based controls to block .rm file downloads and prevent automatic execution of media files from untrusted sources. Security professionals should consider disabling RealPlayer in enterprise environments where it is not required for business operations. Additional protective measures include implementing application whitelisting policies to restrict execution of vulnerable software, deploying intrusion detection systems to monitor for exploitation attempts, and conducting regular vulnerability assessments to identify remaining instances of affected software. The vulnerability also underscores the importance of maintaining up-to-date security patches and implementing comprehensive software inventory management to quickly identify and remediate similar issues across the enterprise infrastructure.