CVE-2024-35397 in CP900L
Summary
by MITRE • 05/28/2024
TOTOLINK CP900L v4.1.5cu.798_B20221228 weas discovered to contain a command injection vulnerability in the NTPSyncWithHost function via the hostTime parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/19/2024
The vulnerability identified as CVE-2024-35397 affects the TOTOLINK CP900L router firmware version v4.1.5cu.798_B20221228 and represents a critical command injection flaw within the Network Time Protocol synchronization functionality. This vulnerability resides in the NTPSyncWithHost function where the hostTime parameter is improperly handled, creating an avenue for malicious actors to inject and execute arbitrary commands on the affected device. The issue stems from insufficient input validation and sanitization mechanisms that fail to properly filter user-supplied data before incorporating it into system commands.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious HTTP request containing specially formatted input in the hostTime parameter. The router's firmware fails to adequately sanitize this input, allowing the attacker to append shell commands that get executed with the privileges of the affected service. This command injection vulnerability falls under CWE-77 which specifically addresses command injection flaws in software systems. The impact is particularly severe as it enables remote code execution without requiring authentication, making the device vulnerable to unauthorized access and potential compromise.
From an operational perspective, this vulnerability poses significant risks to network security infrastructure as it allows attackers to gain full control over the router's functionality. Once exploited, adversaries can manipulate network configurations, redirect traffic, establish persistence mechanisms, and potentially use the compromised device as a pivot point for further attacks within the network. The vulnerability directly aligns with ATT&CK technique T1059.001 for command and scripting interpreter, and T1021.001 for remote services, enabling attackers to execute malicious payloads and maintain persistent access to the network. Network administrators face the challenge of securing devices that may be accessible from untrusted networks, particularly when these devices are exposed to the internet without proper firewall protection.
Mitigation strategies for CVE-2024-35397 should prioritize immediate firmware updates from TOTOLINK to address the command injection vulnerability. Organizations should implement network segmentation to isolate critical infrastructure from general network traffic, deploy intrusion detection systems to monitor for suspicious HTTP requests targeting the affected router, and establish network access controls to prevent unauthorized access to network devices. Additionally, security professionals should conduct comprehensive vulnerability assessments of all network equipment to identify similar command injection vulnerabilities in other devices. The implementation of web application firewalls and input validation controls can provide additional layers of protection, while regular security audits should ensure that all network devices maintain current firmware versions and security patches. Organizations should also consider implementing network monitoring solutions that can detect anomalous command execution patterns and provide real-time alerts for potential exploitation attempts.