CVE-2022-26998 in TR3300
Summary
by MITRE • 03/16/2022
Arris TR3300 v1.0.13 was discovered to contain a command injection vulnerability in the wps setting function via the wps_enrolee_pin parameter. 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-2022-26998 vulnerability represents a critical command injection flaw in Arris TR3300 routers running firmware version 1.0.13. This vulnerability specifically targets the wireless protected setup wps setting function, where the wps_enrolee_pin parameter fails to properly sanitize user input. The flaw enables remote attackers to inject malicious commands directly into the router's command execution pipeline, potentially compromising the entire network infrastructure. Such vulnerabilities are particularly dangerous in network devices as they can provide attackers with elevated privileges and persistent access to connected systems.
The technical implementation of this vulnerability aligns with CWE-77, which describes command injection flaws where untrusted data is incorporated into system commands without proper validation or sanitization. The wps_enrolee_pin parameter serves as the attack vector, allowing malicious actors to craft specially formatted requests that bypass input validation mechanisms. When the router processes these malformed inputs, it executes the injected commands within the context of the device's operating system, potentially granting attackers root-level access or the ability to modify critical network configurations. This type of vulnerability falls under the ATT&CK framework's T1059.001 technique for command and scripting interpreter, specifically targeting the command shell component of network infrastructure devices.
The operational impact of CVE-2022-26998 extends beyond simple unauthorized access, as it can lead to complete network compromise and persistent backdoor installation. An attacker could leverage this vulnerability to establish remote command execution capabilities, potentially using the compromised router as a pivot point to scan internal networks, redirect traffic, or deploy additional malware. The vulnerability's remote exploitability means that attackers do not require physical access to the device, making it particularly concerning for enterprise and residential deployments. Network administrators may experience unauthorized modifications to wireless settings, potential data exfiltration, and the possibility of using the device as a launching point for broader network attacks.
Mitigation strategies for CVE-2022-26998 should focus on immediate firmware updates from Arris, as the vendor has likely released patches addressing this specific command injection flaw. Network segmentation and access control measures can help limit the potential impact if exploitation occurs, while monitoring for unusual network traffic patterns and command execution attempts should be implemented. Security teams should also consider disabling unnecessary wireless features like WPS when not actively required, as this reduces the attack surface. Regular vulnerability assessments of network infrastructure devices, including thorough input validation reviews, can help identify similar command injection vulnerabilities in other network equipment. The remediation process should include comprehensive testing of updated firmware to ensure that the patch effectively addresses the vulnerability without introducing compatibility issues with existing network configurations.