CVE-2022-32271 in RealPlayer
Summary
by MITRE • 06/03/2022
In Real Player 20.0.8.310, there is a DCP:// URI Remote Arbitrary Code Execution Vulnerability. This is an internal URL Protocol used by Real Player to reference a file that contains an URL. It is possible to inject script code to arbitrary domains. It is also possible to reference arbitrary local files.
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Analysis
by VulDB Data Team • 06/06/2022
The vulnerability identified as CVE-2022-32271 represents a critical remote code execution flaw in Real Player version 20.0.8.310 that leverages the DCP:// URI protocol implementation. This protocol serves as an internal URL mechanism within the media player to reference files containing URLs, creating a potential attack vector where malicious actors can inject script code into arbitrary domains. The vulnerability stems from insufficient input validation and sanitization within the DCP:// URI handler, allowing attackers to craft malicious URIs that bypass normal security boundaries. The flaw specifically affects how the player processes these internal protocol references, enabling unauthorized code execution through crafted URI parameters that can target both remote domains and local system resources. This issue falls under the CWE-77 vulnerability category, which encompasses improper neutralization of special elements used in a command or injection attack, and represents a classic example of a protocol handler vulnerability that can be exploited for arbitrary code execution.
The technical exploitation of this vulnerability occurs through the manipulation of DCP:// URI syntax to inject malicious payloads that the Real Player application processes without adequate security controls. Attackers can construct specially crafted URIs that contain script code or references to external resources, which then execute within the context of the player application. The vulnerability allows for both remote code execution against arbitrary domains and local file access, creating a dual threat vector that can compromise system integrity and confidentiality. The attack surface extends beyond simple command injection to include potential privilege escalation and lateral movement capabilities, particularly when the player application runs with elevated privileges. This type of vulnerability aligns with ATT&CK technique T1203, which covers legitimate user execution through application shimming, and demonstrates how protocol handlers can be weaponized for malicious code execution in media player environments.
The operational impact of CVE-2022-32271 extends significantly beyond traditional media player exploitation scenarios, as it provides attackers with a mechanism to execute arbitrary code on vulnerable systems without requiring user interaction beyond opening a maliciously crafted URI. The vulnerability affects systems where Real Player is installed and actively processes DCP:// URIs, potentially enabling attackers to gain unauthorized access to system resources, execute malicious payloads, and establish persistence mechanisms. The remote nature of the vulnerability means that attackers can exploit it from anywhere on the network, making it particularly dangerous in enterprise environments where media players are commonly used for presentations, training materials, and multimedia content delivery. Organizations using Real Player in their infrastructure face potential data breaches, system compromise, and unauthorized access to sensitive information, as the vulnerability can be exploited through various attack vectors including phishing emails, malicious websites, or compromised content delivery networks. The vulnerability's severity is compounded by the fact that it operates at the application protocol level, making it difficult to detect through traditional network monitoring and intrusion detection systems that may not specifically monitor for DCP:// URI processing anomalies.
Mitigation strategies for CVE-2022-32271 should focus on immediate patching and protocol handler restrictions to prevent exploitation. Organizations must prioritize updating Real Player to versions that address the DCP:// URI processing flaws, as the vendor has likely released security patches to resolve this vulnerability. Network administrators should implement strict URI filtering policies that block or restrict DCP:// protocol usage, particularly in environments where the protocol is not required for legitimate business operations. Additionally, endpoint protection solutions should be configured to monitor and alert on suspicious URI processing activities, particularly those involving protocol handlers that can execute code. The implementation of application whitelisting policies can prevent unauthorized execution of malicious code through protocol handlers, while regular security assessments should be conducted to identify systems running vulnerable versions of Real Player. Security teams should also consider implementing network segmentation to limit the potential impact of successful exploitation, and establish incident response procedures specifically addressing protocol handler vulnerabilities in media applications. The vulnerability serves as a reminder of the importance of secure protocol implementation and the need for regular security assessments of media player applications that handle external URI references.