CVE-2022-24992 in QRcdr
Summary
by MITRE • 07/25/2022
A vulnerability in the component process.php of QR Code Generator v5.2.7 allows attackers to perform directory traversal.
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Analysis
by VulDB Data Team • 08/27/2022
The vulnerability identified as CVE-2022-24992 resides within the process.php component of QR Code Generator version 5.2.7, presenting a critical directory traversal flaw that enables remote attackers to access arbitrary files on the affected system. This vulnerability stems from insufficient input validation and sanitization within the file processing logic, allowing malicious actors to manipulate file paths through crafted requests. The flaw specifically affects the application's ability to properly handle user-supplied input when determining which files to process or generate, creating an avenue for unauthorized access to sensitive system resources.
Directory traversal vulnerabilities represent a well-documented class of security flaws categorized under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. The ATT&CK framework classifies this as a privilege escalation technique under the T1059.007 sub-technique for "Command and Scripting Interpreter" and T1566.001 for "Phishing". Attackers can exploit this vulnerability by crafting malicious requests that include directory traversal sequences such as ../ or ..\, which when processed by the vulnerable application, can navigate outside the intended directory structure and access files that should remain restricted. This includes potentially sensitive configuration files, database credentials, application source code, and other confidential data that may be stored within the application's file system.
The operational impact of CVE-2022-24992 extends beyond simple information disclosure, as it can enable attackers to escalate privileges and potentially execute arbitrary code within the application's environment. When combined with other vulnerabilities or attack vectors, this directory traversal flaw can serve as a stepping stone for more sophisticated attacks. The vulnerability affects the application's core functionality of generating QR codes, but the flaw allows attackers to bypass intended access controls and retrieve files from any location accessible to the web server process. This can lead to complete system compromise if sensitive files containing database credentials, API keys, or application configuration details are accessible through the traversal mechanism. The vulnerability is particularly concerning in environments where the web application runs with elevated privileges or has access to sensitive system resources.
Mitigation strategies for CVE-2022-24992 should focus on implementing robust input validation and sanitization mechanisms within the process.php component. Organizations should immediately upgrade to a patched version of QR Code Generator if available, as this represents the most effective solution to address the vulnerability. Additionally, implementing proper path validation that strips or rejects directory traversal sequences from user input, using whitelisting approaches for file operations, and ensuring the application runs with minimal required privileges can significantly reduce the attack surface. Network segmentation and web application firewalls can provide additional layers of protection by monitoring and filtering suspicious requests that attempt directory traversal attacks. Regular security assessments and input validation testing should be conducted to ensure that similar vulnerabilities are not present in other components of the application or related systems. The vulnerability highlights the importance of following secure coding practices and adhering to the principle of least privilege when developing web applications that process user input.