CVE-2007-3369 in SoundPoint IP 601
Summary
by MITRE
Buffer overflow in the Polycom SoundPoint IP 601 SIP phone with BootROM 3.0.x+ and SIP version 1.6.3.0067 allows remote attackers to cause a denial of service (device hang or reboot) via an INVITE message with a long Via header.
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Analysis
by VulDB Data Team • 10/25/2017
The vulnerability described in CVE-2007-3369 represents a critical buffer overflow condition affecting the Polycom SoundPoint IP 601 SIP phone running specific firmware versions. This issue resides within the device's BootROM 3.0.x+ and SIP version 1.6.3.0067, creating a significant security risk that can be exploited remotely by malicious actors. The flaw manifests when the device receives an INVITE message containing an excessively long Via header, which triggers the buffer overflow condition. This particular vulnerability falls under the CWE-121 buffer overflow category, specifically classified as a stack-based buffer overflow that occurs during the processing of SIP signaling messages. The attack vector leverages the SIP protocol's INVITE message structure, which is fundamental to establishing voice communication sessions, making this a particularly dangerous flaw in telecommunications infrastructure.
The technical implementation of this vulnerability demonstrates how improper input validation can lead to system instability and complete service disruption. When the Polycom SoundPoint IP 601 processes an INVITE message with an oversized Via header, the device's memory management fails to properly handle the excessive data length, causing the buffer to overflow and overwrite adjacent memory segments. This overflow condition directly impacts the device's execution flow, resulting in either a device hang where the phone becomes unresponsive or a complete system reboot. The vulnerability is particularly concerning because it operates at the network protocol level, allowing remote attackers to exploit the flaw without requiring physical access to the device or specialized equipment. The attack can be executed through standard network traffic manipulation, making it accessible to a wide range of threat actors.
The operational impact of this vulnerability extends beyond simple denial of service, as it can severely disrupt communication services in enterprise and institutional environments. Organizations relying on Polycom SoundPoint IP 601 devices for voice communication may experience complete loss of telephony services, potentially affecting business continuity and emergency communication capabilities. The vulnerability affects the core functionality of SIP-based communication systems, where the device's inability to properly process legitimate network traffic can cascade into larger network issues. From an attack framework perspective, this vulnerability aligns with the MITRE ATT&CK technique T1499.004 for network denial of service attacks, specifically targeting network infrastructure components. The device's reboot behavior can also be exploited to create persistent availability issues, potentially requiring manual intervention to restore service.
Mitigation strategies for CVE-2007-3369 require immediate firmware updates from Polycom to address the buffer overflow condition in the affected BootROM and SIP versions. Network administrators should implement strict SIP message filtering at perimeter firewalls and SIP proxies to prevent malformed INVITE messages from reaching the affected devices. The implementation of rate limiting and message size restrictions on SIP traffic can provide additional protective layers. Organizations should also consider network segmentation to isolate voice communication systems from general network traffic, reducing the attack surface for such exploits. Security monitoring solutions should be configured to detect anomalous SIP traffic patterns that may indicate exploitation attempts. The vulnerability highlights the importance of maintaining current firmware versions and implementing robust network security practices for voice-over-IP infrastructure. Regular security assessments of telephony systems and proper input validation mechanisms in network protocols are essential preventive measures that align with industry best practices for securing communication infrastructure.