CVE-2013-4974 in RealPlayer
Summary
by MITRE
RealNetworks RealPlayer before 16.0.3.51, and RealPlayer SP 1.0 through 1.1.5, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a malformed RealMedia file.
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Analysis
by VulDB Data Team • 05/21/2021
The vulnerability identified as CVE-2013-4974 represents a critical memory corruption flaw affecting RealNetworks RealPlayer software across multiple versions including RealPlayer 16.0.3.51 and earlier releases, as well as RealPlayer SP 1.0 through 1.1.5. This security weakness stems from insufficient input validation mechanisms within the media player's handling of RealMedia file formats, creating a pathway for malicious actors to exploit memory management vulnerabilities through carefully crafted malformed media files.
The technical implementation of this vulnerability involves improper bounds checking and memory allocation handling when processing specially constructed RealMedia files. Attackers can leverage this flaw by crafting malicious media content that triggers buffer overflow conditions or heap corruption during the parsing and rendering processes. The vulnerability manifests as a direct result of the player's failure to properly validate file headers, data structures, and stream parameters, allowing crafted inputs to overwrite memory regions beyond intended boundaries. This memory corruption can lead to arbitrary code execution when the corrupted memory locations contain executable instructions or cause denial of service through application crashes and system instability.
From an operational perspective, this vulnerability presents significant risks to end users and organizations relying on RealPlayer for media playback. The remote exploitation capability means attackers can deliver malicious payloads through various attack vectors including email attachments, web downloads, or compromised websites without requiring local system access. The impact extends beyond individual user compromise to potential network-wide disruption, as successful exploitation could allow attackers to gain unauthorized system access, escalate privileges, or deploy additional malware components. Organizations using legacy RealPlayer installations face heightened risk due to the extended support period for these vulnerable versions and the difficulty in immediately patching systems that depend on older media player functionality.
The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-122, covering buffer overflow vulnerabilities in heap-based memory structures. From an adversary tactics perspective, this weakness maps to ATT&CK technique T1203, involving exploitation of remote services through crafted payloads, and T1059, focusing on command and control through compromised applications. The attack surface is particularly concerning given RealPlayer's widespread deployment in enterprise environments and consumer markets, making this vulnerability attractive to both nation-state actors and criminal organizations seeking persistent access to target systems.
Effective mitigation strategies include immediate deployment of RealNetworks security patches addressing the identified memory corruption issues in versions 16.0.3.51 and later, along with implementing network-based controls such as content filtering and sandboxing mechanisms to prevent execution of potentially malicious media files. Organizations should also consider implementing application whitelisting policies that restrict execution of untrusted media player components and establish network monitoring procedures to detect anomalous file access patterns. Additionally, regular security assessments should verify proper patch management procedures and ensure that legacy systems utilizing vulnerable RealPlayer versions are either updated or isolated from critical network segments to minimize potential attack surface exposure.