CVE-2016-5234 in VP9660
Summary
by MITRE
Buffer overflow in Huawei VP9660, VP9650, and VP9630 multipoint control unit devices with software before V500R002C00SPC200 and RSE6500 videoconference devices with software before V500R002C00SPC100, when an unspecified service is enabled, allows remote attackers to execute arbitrary code via a crafted packet, aka HWPSIRT-2016-05054.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 01/20/2019
This vulnerability represents a critical buffer overflow flaw affecting Huawei multipoint control unit devices including the VP9660, VP9650, and VP9630 series along with RSE6500 videoconference equipment. The vulnerability exists in firmware versions prior to specific service pack releases, creating a persistent security risk for organizations relying on these video conferencing solutions. The flaw manifests when an unspecified service is enabled on the affected devices, allowing remote attackers to exploit the buffer overflow through carefully crafted network packets that can lead to arbitrary code execution on the target systems.
The technical implementation of this vulnerability involves a classic buffer overflow condition where insufficient input validation occurs in the network service handling code. Attackers can craft malicious packets that exceed the allocated buffer space, causing memory corruption that can be leveraged to overwrite critical program execution pointers or inject malicious code. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and represents a significant concern in network services where unauthenticated remote code execution can be achieved. The vulnerability's remote exploitability means that attackers do not require physical access or local credentials to compromise the affected devices, making it particularly dangerous in enterprise environments.
The operational impact of CVE-2016-5234 extends beyond simple system compromise, as it can enable attackers to establish persistent access to video conferencing infrastructure that often serves as critical communication channels for business operations. Organizations may experience complete system takeover, data exfiltration, and potential disruption of critical video conferencing services. The vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would likely involve executing arbitrary commands through the compromised system. Additionally, the attack surface includes potential lateral movement opportunities since these devices typically operate within corporate networks and may serve as entry points to broader network infrastructures.
Mitigation strategies should focus on immediate firmware updates to the patched versions specified by Huawei, as well as network segmentation and access control measures to limit exposure. Organizations should implement network monitoring to detect anomalous packet patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date firmware in network infrastructure devices and highlights the need for regular security assessments of video conferencing systems. Network administrators should also consider implementing intrusion detection systems specifically configured to identify potential buffer overflow exploitation attempts and establish incident response procedures to address successful compromises of these critical communication devices.