CVE-2010-4596 in Helix Server
Summary
by MITRE
Stack-based buffer overflow in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server 12.x, 13.x, and 14.x before 14.2, allows remote attackers to execute arbitrary code via a long string in an RTSP request.
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Analysis
by VulDB Data Team • 10/21/2021
The vulnerability identified as CVE-2010-4596 represents a critical stack-based buffer overflow flaw affecting RealNetworks Helix Server and Helix Mobile Server versions 12.x through 14.x prior to 14.2. This vulnerability resides within the RealNetworks streaming media server software that handles Real Time Streaming Protocol requests, making it a significant threat to media server deployments across various network environments. The flaw specifically manifests when the server processes RTSP (Real Time Streaming Protocol) requests containing excessively long string data, creating a condition where memory allocated on the stack becomes overwritten beyond its intended boundaries. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue that has been consistently identified as a critical threat in cybersecurity assessments and vulnerability management programs.
The technical exploitation of this vulnerability occurs through the manipulation of RTSP protocol requests sent to the affected server instances. When an attacker crafts a malicious RTSP request containing an overly long string parameter, the server's processing logic fails to properly validate the input length before copying it into a fixed-size stack buffer. This overflow condition allows the attacker to overwrite adjacent stack memory locations, potentially including return addresses, saved registers, and other critical control data. The exploitation process typically involves carefully constructed payload data that can overwrite the instruction pointer or other control structures, enabling the execution of arbitrary code with the privileges of the affected server process. This represents a classic example of how protocol handling vulnerabilities can be leveraged for remote code execution, aligning with tactics described in the MITRE ATT&CK framework under T1203 Exploitation for Client Execution and T1059 Command and Scripting Interpreter.
The operational impact of CVE-2010-4596 extends beyond simple remote code execution, as it can compromise entire media server infrastructures and potentially provide attackers with persistent access to network resources. Organizations relying on RealNetworks Helix Server for streaming media services face significant risk of unauthorized access, data exfiltration, and service disruption when this vulnerability remains unpatched. The vulnerability affects both desktop and mobile server variants, indicating a widespread impact across RealNetworks' streaming platform. Network administrators must consider that successful exploitation could lead to complete server compromise, allowing attackers to establish backdoors, escalate privileges, or use the compromised server as a launch point for further attacks against internal network resources. The vulnerability's remote nature means that attackers do not require physical access or local network presence to exploit the flaw, making it particularly dangerous for publicly accessible media servers. Organizations implementing security controls should reference industry standards such as NIST SP 800-125 and ISO 27001 to understand proper vulnerability remediation procedures and ensure comprehensive security postures are maintained.
Mitigation strategies for CVE-2010-4596 primarily focus on immediate patch deployment and network-level defensive measures. The most effective remediation involves upgrading to RealNetworks Helix Server 14.2 or later versions where the buffer overflow vulnerability has been addressed through proper input validation and memory management practices. Organizations should also implement network segmentation to limit access to affected servers, deploy intrusion detection systems to monitor for suspicious RTSP traffic patterns, and consider implementing application firewalls that can filter malformed RTSP requests before they reach the vulnerable server instances. Additionally, security teams should conduct thorough vulnerability assessments to identify all instances of the affected software across their network infrastructure and establish monitoring procedures for detecting potential exploitation attempts. The remediation process should align with established cybersecurity frameworks including the NIST Cybersecurity Framework and ISO 27001 standards to ensure comprehensive coverage of the vulnerability's impact and appropriate response measures are implemented across all affected systems.