CVE-2022-26999 in TR3300
Summary
by MITRE • 03/16/2022
Arris TR3300 v1.0.13 was discovered to contain a command injection vulnerability in the static ip settings function via the wan_ip_stat, wan_mask_stat, wan_gw_stat, and wan_dns1_stat parameters. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
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Analysis
by VulDB Data Team • 03/18/2022
The CVE-2022-26999 vulnerability represents a critical command injection flaw in Arris TR3300 routers running firmware version 1.0.13. This vulnerability resides within the static ip settings functionality of the device's web interface, specifically affecting parameters used for configuring wan_ip_stat, wan_mask_stat, wan_gw_stat, and wan_dns1_stat. The flaw stems from inadequate input validation and sanitization within the router's configuration handling mechanisms, allowing malicious actors to inject arbitrary commands through specially crafted HTTP requests. The vulnerability demonstrates a classic lack of proper parameter validation that enables attackers to bypass normal input restrictions and execute unauthorized system commands with the privileges of the web server process.
This command injection vulnerability falls under the CWE-77 category, which specifically addresses command injection flaws in software applications. The ATT&CK framework categorizes this as a command and control technique under the T1059.001 sub-technique, where adversaries leverage command injection to execute arbitrary commands on compromised systems. The vulnerability's impact is particularly severe as it allows remote code execution without requiring authentication, making it a prime target for automated exploitation campaigns. The affected parameters are typically used during network configuration processes, making legitimate administrative access points vulnerable to exploitation by attackers who can craft malicious requests to manipulate the device's network configuration.
The operational impact of this vulnerability extends beyond simple remote code execution, as it provides attackers with complete control over the affected router's functionality. Successful exploitation can lead to persistent backdoor access, network reconnaissance, traffic interception, and potential lateral movement within the network. Attackers can leverage the compromised device as a pivot point to target other systems on the same network segment, while also potentially disrupting network services or creating denial of service conditions. The vulnerability affects both the router's web interface and its underlying operating system, meaning that attackers can manipulate not just the configuration parameters but also execute system-level commands that could compromise the entire device.
Mitigation strategies for CVE-2022-26999 should prioritize immediate firmware updates from Arris, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should also implement network segmentation to limit the potential impact of a compromised device, while monitoring for suspicious network traffic patterns that might indicate exploitation attempts. Additional defensive measures include disabling unnecessary web interfaces, implementing strict access controls for administrative functions, and regularly auditing network configurations to detect unauthorized changes. Security monitoring solutions should be configured to detect anomalous command execution patterns and unusual parameter values in HTTP requests. Organizations should also consider implementing network access controls that restrict access to router management interfaces to trusted network segments only, as this vulnerability can be exploited from external network positions. The vulnerability highlights the importance of input validation and proper sanitization in embedded web applications, particularly those handling network configuration parameters that could be manipulated by unauthorized users.