CVE-2010-2307 in Surfboard Sbv6120e
Summary
by MITRE
Multiple directory traversal vulnerabilities in the web server for Motorola SURFBoard cable modem SBV6120E running firmware SBV6X2X-1.0.0.5-SCM-02-SHPC allow remote attackers to read arbitrary files via (1) "//" (multiple leading slash), (2) ../ (dot dot) sequences, and encoded dot dot sequences in a URL request.
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Analysis
by VulDB Data Team • 09/16/2024
The vulnerability identified as CVE-2010-2307 represents a critical directory traversal flaw affecting Motorola SURFBoard cable modem SBV6120E devices running specific firmware versions. This weakness resides within the web server component of the device's firmware, creating a pathway for remote attackers to access arbitrary files on the system. The vulnerability specifically impacts the URL parsing mechanism that processes incoming web requests, allowing malicious actors to manipulate file paths through various traversal techniques.
The technical implementation of this vulnerability exploits multiple methods of directory traversal including multiple leading slashes denoted as "//", standard dot-dot sequences "../", and encoded variants of these traversal patterns within URL requests. These techniques enable attackers to bypass normal file access controls and navigate the file system to access sensitive files that should remain restricted. The vulnerability stems from insufficient input validation and sanitization within the web server's request handling code, allowing raw path traversal sequences to be processed without proper security checks.
From an operational perspective, this vulnerability presents significant risks to network security as it enables remote code execution and information disclosure capabilities. Attackers can potentially access system configuration files, authentication credentials, network settings, and other sensitive data stored on the modem. The remote nature of the attack means that adversaries do not require physical access to the device or network proximity to exploit the vulnerability, making it particularly dangerous in enterprise and residential networking environments. This weakness directly violates the principle of least privilege and can lead to complete system compromise.
The vulnerability maps to CWE-22 Directory Traversal and aligns with several ATT&CK techniques including T1059 Command and Scripting Interpreter for executing malicious commands and T1083 File and Directory Discovery for enumerating system files. Organizations using affected Motorola devices should implement immediate mitigations including firmware updates from Motorola, network segmentation to isolate critical devices, and firewall rules blocking unnecessary web traffic to the affected modems. Additionally, regular security assessments and network monitoring should be conducted to detect potential exploitation attempts. The vulnerability highlights the importance of secure coding practices and input validation in embedded systems, particularly those handling network communications and serving web content.