CVE-2022-36749 in RPi-Jukebox-RFID
Summary
by MITRE • 08/31/2022
RPi-Jukebox-RFID v2.3.0 was discovered to contain a command injection vulnerability via the component /htdocs/utils/Files.php. This vulnerability is exploited via a crafted payload injected into the file name of an uploaded file.
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Analysis
by VulDB Data Team • 10/10/2022
The vulnerability identified as CVE-2022-36749 affects the RPi-Jukebox-RFID v2.3.0 system, a popular open-source music player solution designed for raspberry pi devices. This system enables users to control music playback through RFID tags and provides web-based management interfaces for file handling and system configuration. The specific vulnerability resides within the /htdocs/utils/Files.php component which processes file upload operations and handles filename manipulation. The flaw represents a critical security weakness that allows attackers to execute arbitrary commands on the underlying system through improper input validation and sanitization.
The technical implementation of this command injection vulnerability stems from insufficient validation of user-supplied filenames during the file upload process. When users upload files through the web interface, the system processes the filename without adequate sanitization measures, allowing malicious payloads to be embedded within the filename itself. Attackers can craft specially formatted filenames containing shell command syntax that gets executed when the system processes these files. This represents a classic command injection vulnerability where user input directly influences system command execution, making it particularly dangerous for systems with elevated privileges.
The operational impact of this vulnerability extends beyond simple unauthorized command execution, as it provides attackers with complete control over the affected system. An attacker who successfully exploits this vulnerability can execute arbitrary commands with the privileges of the web server process, potentially leading to full system compromise. The attack surface is particularly concerning given that RPi-Jukebox-RFID systems are often deployed in home environments where they may have network access and could be targeted for lateral movement within local networks. This vulnerability can be exploited remotely through the web interface, making it accessible to attackers without physical access to the device.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms within the file upload processing pipeline. The system should validate all user-supplied filenames against a strict whitelist of allowed characters and reject any input containing potentially dangerous sequences such as semicolons, ampersands, or other command injection indicators. Additionally, the system should implement proper file handling procedures that separate user-provided filenames from command execution contexts. Organizations should also consider implementing web application firewalls and input validation layers to provide additional protection against similar vulnerabilities. The fix should align with CWE-77 principles for command injection prevention and follow ATT&CK technique T1059.001 for command and scripting interpreter to ensure comprehensive protection against command execution attacks. Regular security audits and input validation testing should be implemented to prevent similar vulnerabilities from emerging in future versions of the software.