RealNetworks Helix Server and Helix Mobile Server contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition and execute arbitrary code.
The vulnerability is due to insufficient bounds checking of user-supplied input that is passed to the Helix Server. An unauthenticated, remote attacker could send a certain crafted request to the affected system to trigger a heap-based buffer overflow condition. An attacker could exploit this vulnerability to execute arbitrary code on the system with the privileges of the service. Failed exploit attempts will likely result in a DoS condition.
RealNetworks has confirmed this vulnerability and updates are available.
Indicators of Compromise
The following RealNetworks products are affected:
Helix Server versions 11.1.6 and prior Helix Server version 12 Helix Mobile Server versions 11.1.6 and prior Helix Mobile Server version 12
The vulnerability is due to insufficient boundary checking when Helix Server processes RTSP DESCRIBE messages. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted request to a system. Due to unspecified errors, the request may trigger a heap-based overflow that creates a DoS condition or executes arbitrary code with the privileges of the service.
Few details are available to describe the vulnerability. Attackers do not require user interaction to conduct an attack. In addition, the attacker does not need to authenticate to the system. Successful exploitation results in a DoS condition or arbitrary code execution with the privileges of the service.
Administrators are advised to apply the appropriate updates.
Administrators may consider restricting network access to affected systems.
Administrators are advised to configure Helix Server to run with minimal privileges.
Administrators may consider using a host-based intrusion prevention or intrusion detection system to help mitigate a successful exploit.
Administrators are advised to closely monitor affected systems.
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM
THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
FIXED SOFTWARE INFORMATION AND LINKS PROVIDED BY SUPPLIERS AND VENDORS ARE FOR REFERENCE ONLY. USERS SHOULD CONTACT THEIR SUPPLIER OR VENDOR FOR UPDATED SOFTWARE.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products
Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.