CVE-2013-6924 in BlackArmor NAS
Summary
by MITRE
Seagate BlackArmor NAS devices with firmware sg2000-2000.1331 allow remote attackers to execute arbitrary commands via shell metacharacters in the ip parameter to backupmgt/getAlias.php.
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Analysis
by VulDB Data Team • 06/22/2024
The vulnerability identified as CVE-2013-6924 affects Seagate BlackArmor Network Attached Storage devices running specific firmware versions, presenting a critical remote command execution flaw that could enable attackers to gain unauthorized control over affected systems. This vulnerability resides within the backupmgt/getAlias.php web script, which processes user input through the ip parameter without adequate sanitization or validation mechanisms. The flaw represents a classic command injection vulnerability that allows remote threat actors to inject malicious shell metacharacters into the targeted parameter, potentially executing arbitrary system commands with the privileges of the web application.
The technical nature of this vulnerability aligns with CWE-77, known as "Command Injection," which occurs when an application passes untrusted data to an operating system command without proper validation or sanitization. The affected Seagate BlackArmor NAS devices expose a web interface that processes user-supplied input through the ip parameter, creating an attack vector where malicious actors can craft specially formatted input containing shell metacharacters such as semicolons, ampersands, or backticks. When the web application processes this unvalidated input and incorporates it directly into system commands, it creates an environment where attackers can execute arbitrary code on the underlying operating system.
From an operational impact perspective, this vulnerability poses significant risks to organizations relying on Seagate BlackArmor NAS devices for data storage and backup operations. Remote attackers who exploit this vulnerability can potentially gain full system control, allowing them to access sensitive data, modify backup configurations, install malicious software, or use the compromised device as a pivot point for attacking other systems within the network. The attack surface is particularly concerning because it requires no authentication to exploit, making it accessible to anyone who can reach the device's web interface. This characteristic places the vulnerability in the ATT&CK framework under the T1059.001 technique for "Command and Scripting Interpreter: PowerShell" and T1203 for "Exploitation for Client Execution," though the specific implementation involves direct shell command injection rather than PowerShell.
The mitigation strategies for this vulnerability should focus on immediate firmware updates from Seagate, as the company would have likely released patches addressing the command injection flaw. Organizations should also implement network segmentation to restrict access to NAS devices, deploy web application firewalls to monitor and filter incoming requests, and apply input validation controls to prevent malicious characters from reaching the application layer. Additionally, network monitoring solutions should be configured to detect suspicious patterns in HTTP requests targeting the backupmgt/getAlias.php endpoint, particularly those containing shell metacharacters or unusual command sequences. System administrators should also consider disabling unnecessary web services and implementing principle of least privilege access controls to limit the potential damage from successful exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and output encoding in web applications, particularly when dealing with user-supplied data that may be passed to system commands, aligning with security best practices outlined in OWASP Top Ten and NIST Cybersecurity Framework guidelines for preventing injection vulnerabilities.