CVE-2023-1162 in Vigor 2960
Summary
by MITRE • 03/03/2023
A vulnerability, which was classified as critical, was found in DrayTek Vigor 2960 1.5.1.4. Affected is the function sub_1225C of the file mainfunction.cgi. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-222258 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 08/02/2024
The vulnerability identified as CVE-2023-1162 represents a critical command injection flaw within the DrayTek Vigor 2960 router firmware version 1.5.1.4. This security weakness resides in the mainfunction.cgi file at the sub_1225C function, which processes user input without adequate sanitization or validation mechanisms. The affected device operates as a network gateway and firewall appliance, making it a prime target for attackers seeking to compromise network infrastructure. The vulnerability's classification as critical stems from its potential to allow unauthorized execution of arbitrary commands on the affected device, which could result in complete system compromise and unauthorized network access.
The technical implementation of this command injection vulnerability occurs through improper input handling within the sub_1225C function, which processes parameters passed to the mainfunction.cgi script. When user-supplied data is directly incorporated into system commands without proper sanitization, attackers can manipulate input fields to inject malicious commands that execute with the privileges of the web server process. This allows adversaries to execute arbitrary code on the router, potentially gaining root access to the device's operating system. The vulnerability's remote exploitability means that attackers do not require physical access to the device, as the flaw can be exploited through network-based attacks targeting the web management interface.
The operational impact of this vulnerability extends beyond simple command execution, as it enables attackers to fully compromise the network gateway device. Once exploited, attackers can gain persistent access to the router's configuration, modify firewall rules, redirect network traffic, and potentially establish backdoors for continued access. The DrayTek Vigor 2960 serves as a critical network component, and its compromise could lead to widespread network disruption, data exfiltration, and lateral movement within the compromised network. The public disclosure of the exploit (VDB-222258) increases the risk profile significantly, as malicious actors can readily implement the attack without requiring advanced technical skills.
Mitigation strategies for CVE-2023-1162 should prioritize immediate firmware updates from DrayTek, as this represents the most effective defense against the vulnerability. Network administrators should implement network segmentation to limit access to the affected device, disable unnecessary services, and monitor network traffic for suspicious activities. The vulnerability aligns with CWE-77 and CWE-94 categories, representing command injection flaws that allow arbitrary code execution. From an ATT&CK framework perspective, this vulnerability maps to techniques such as T1059.001 (Command and Scripting Interpreter: PowerShell) and T1566 (Phishing), as attackers may use the compromised device as a staging point for further attacks. Organizations should also consider implementing network monitoring solutions to detect potential exploitation attempts and maintain detailed logs of management interface access for forensic analysis purposes.