CVE-2022-27276 in InRouter 900 Industrial 4G Router
Summary
by MITRE • 04/11/2022
InHand Networks InRouter 900 Industrial 4G Router before v1.0.0.r11700 was discovered to contain a remote code execution (RCE) vulnerability via the function sub_10F2C. This vulnerability is triggered via a crafted packet.
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Analysis
by VulDB Data Team • 04/13/2022
The vulnerability identified as CVE-2022-27276 represents a critical remote code execution flaw in InHand Networks InRouter 900 Industrial 4G routers running firmware versions prior to v1.0.0.r11700. This device operates within industrial environments where network infrastructure reliability and security are paramount, making such vulnerabilities particularly dangerous. The affected router model is designed for industrial 4G connectivity and is commonly deployed in remote monitoring and control applications where unauthorized access could lead to significant operational disruptions. The vulnerability resides within the function sub_10F2C which processes incoming network packets, creating a pathway for attackers to execute arbitrary code on the affected device.
The technical implementation of this vulnerability involves a flaw in how the router handles crafted network packets, specifically within the sub_10F2C function. This function appears to process incoming data without adequate input validation or sanitization mechanisms, allowing malicious actors to construct packets that trigger buffer overflow conditions or other memory corruption issues. The vulnerability can be exploited remotely without requiring authentication, making it particularly dangerous as attackers can target these devices from anywhere on the internet. The flaw likely stems from improper handling of user-supplied data within the network processing pipeline, creating a condition where crafted input can overwrite memory locations and potentially redirect execution flow to malicious code. This type of vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a classic example of unsafe memory manipulation in network services.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables complete compromise of the affected industrial router. Once exploited, attackers can gain full administrative control over the device, allowing them to modify network configurations, intercept traffic, redirect connections, or even use the device as a pivot point to attack other systems within the industrial network. In industrial environments where these routers often serve as critical communication links between field devices and central control systems, such compromise could lead to operational technology (OT) security breaches with potentially severe consequences. The vulnerability affects devices deployed in sectors including energy, manufacturing, and transportation where network reliability is crucial. Attackers could leverage this RCE capability to disrupt operations, steal sensitive operational data, or even cause physical damage through manipulation of industrial control systems. The attack surface is particularly concerning given that these industrial routers are often deployed in remote locations with limited physical security and may have minimal network monitoring in place.
Mitigation strategies for this vulnerability require immediate firmware updates from InHand Networks to address the specific flaw in function sub_10F2C. Organizations should implement network segmentation to isolate these devices from critical systems and monitor network traffic for unusual patterns that might indicate exploitation attempts. The vulnerability's remote nature means that traditional perimeter security measures alone are insufficient, and organizations should consider implementing intrusion detection systems specifically configured to identify malicious packet patterns targeting this vulnerability. Network administrators should also review and restrict access to these devices through network access control lists and disable unnecessary services to minimize the attack surface. From an ATT&CK framework perspective, this vulnerability maps to techniques involving remote service exploitation and privilege escalation, with potential for lateral movement once initial access is achieved. The affected devices should be prioritized for immediate remediation, and organizations should conduct comprehensive vulnerability assessments to identify other potentially affected industrial network equipment that may share similar architectural flaws.