UTT HiPER 1200GW Buffer Overflow Vulnerability

A buffer overflow vulnerability has been identified in UTT HiPER 1200GW devices with firmware versions up to 2.5.3-170306. The flaw resides within the strcpy function of the /goform/formRemoteControl file, which handles remote control functionalities. A remote attacker can exploit this vulnerability by sending a specially crafted request to trigger the buffer overflow, potentially leading to arbitrary code execution on the affected device. Publicly available exploit code exists, increasing the risk of exploitation. This vulnerability poses a significant threat to organizations using the affected UTT HiPER 1200GW devices, as it could allow attackers to gain unauthorized access and control over the device and potentially the network it is connected to.

Attack Chain

1. Attacker identifies a vulnerable UTT HiPER 1200GW device exposed to the internet.
2. Attacker crafts a malicious HTTP request targeting the /goform/formRemoteControl endpoint.
3. The malicious request includes a payload designed to overflow the buffer when processed by the strcpy function.
4. The vulnerable strcpy function within /goform/formRemoteControl copies the attacker-controlled data without proper bounds checking.
5. The buffer overflow overwrites adjacent memory regions, potentially including critical program data or execution pointers.
6. The attacker leverages the overflow to inject and execute arbitrary code on the device.
7. The attacker gains control of the device, potentially escalating privileges.
8. The attacker uses the compromised device to pivot to other systems on the network, exfiltrate sensitive data, or cause further damage.

Impact

Successful exploitation of this vulnerability could lead to complete compromise of the affected UTT HiPER 1200GW device. Attackers could gain unauthorized access to sensitive data, disrupt device functionality, or use the device as a foothold for further attacks within the network. Given that public exploits are available, the risk of widespread exploitation is high. While the exact number of affected devices is unknown, organizations using UTT HiPER 1200GW devices should take immediate action to mitigate this vulnerability.

Recommendation

• Apply available patches or firmware updates from UTT to address the buffer overflow vulnerability in UTT HiPER 1200GW devices.
• Monitor network traffic for suspicious requests targeting the /goform/formRemoteControl endpoint, and deploy the Sigma rule Detect Suspicious Requests to FormRemoteControl to identify potentially malicious activity.
• Implement input validation and sanitization measures to prevent buffer overflows in web applications.
• Consider network segmentation to limit the impact of a compromised device on other systems within the network.
• Review and restrict access to the device’s web interface to only authorized personnel.