CVE-2023-22299 in UR32L
Summary
by MITRE • 07/06/2023
An OS command injection vulnerability exists in the vtysh_ubus _get_fw_logs functionality of Milesight UR32L v32.3.0.5. A specially crafted network request can lead to command execution. An attacker can send a network request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 07/06/2023
The CVE-2023-22299 represents a critical operating system command injection vulnerability within the Milesight UR32L v32.3.0.5 device firmware, specifically affecting the vtysh_ubus _get_fw_logs functionality. This vulnerability resides in the device's command-line interface management system, where untrusted input from network requests is improperly processed and executed without adequate sanitization or validation. The flaw manifests when the system receives crafted network traffic designed to exploit the vtysh_ubus interface, which serves as a bridge between the device's user interface and underlying system commands. This particular vulnerability falls under the CWE-77 category of Command Injection, where attacker-controlled data is interpreted and executed as shell commands by the system.
The technical implementation of this vulnerability demonstrates a classic improper input validation scenario where the _get_fw_logs function fails to properly sanitize user-supplied parameters before incorporating them into system command execution. When an attacker crafts a malicious network request containing specially formatted input, the system processes this data through the vtysh_ubus interface without adequate filtering mechanisms. The vulnerability is particularly concerning because it operates at the system level, allowing remote attackers to execute arbitrary commands with the privileges of the affected service account. This type of vulnerability typically aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where adversaries leverage legitimate system tools to execute malicious code.
The operational impact of CVE-2023-22299 extends beyond simple unauthorized command execution, as it provides attackers with complete control over the affected device's functionality. An attacker could potentially escalate privileges, modify device configurations, access sensitive logs, or even use the compromised device as a pivot point for further network attacks. The vulnerability affects network infrastructure devices that rely on the vtysh_ubus interface for system logging and management operations, making it particularly dangerous in environments where such devices serve as critical network components. The remote exploitation capability means that attackers do not require physical access to the device, significantly expanding the attack surface and potential impact.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from Milesight to address the specific command injection flaw in the vtysh_ubus interface. Network segmentation and access control measures should be implemented to limit exposure of affected devices to untrusted networks. Additionally, administrators should consider implementing network monitoring to detect suspicious traffic patterns that might indicate exploitation attempts. The vulnerability highlights the importance of input validation and proper sanitization of user-supplied data in network management interfaces, aligning with security best practices outlined in NIST SP 800-160 and ISO 27001 standards. Organizations should also conduct thorough vulnerability assessments of their network infrastructure to identify similar issues in other devices that may utilize similar command processing interfaces, as this type of flaw commonly occurs in network management systems where user input is processed without adequate security controls.