OA E-Office LazyUploadify Arbitrary File Upload Scanner

OA E-Office LazyUploadify is a software component commonly used in enterprise office environments for managing file uploads. It is typically utilized by organizations to streamline document management and sharing processes across departments. This software is often employed by administrative staff, document controllers, and project managers as it integrates seamlessly into existing office software suites. Its primary purpose is to facilitate efficient file upload, download, and management functionalities. Despite its utility, this component must be carefully secured due to its potential exposure to external threats. The architecture of OA E-Office encourages ease of use, which may sometimes lead to overlooked security configurations.

The arbitrary file upload vulnerability allows attackers to upload malicious files to the server running OA E-Office LazyUploadify without proper authorization. This security flaw is critical as it can act as a gateway for attackers to execute further exploits on the server. Once an attacker is able to upload malicious files, they can take various actions ranging from defacing the website to creating backdoors for persistent access. File upload vulnerabilities are particularly dangerous due to their potential to change the file structure, execute malicious scripts, or exfiltrate sensitive data. Affected systems are at significant risk until this vulnerability is addressed and mitigated appropriately.

Technical analysis of this vulnerability reveals that the vulnerable endpoint is located in the file upload functionality within the LazyUploadify library distributed with OA E-Office. In particular, the endpoint '/general/weibo/javascript/LazyUploadify/uploadify.php' does not validate file types or sizes adequately, permitting potentially harmful uploads. Vulnerable parameters include the filename and the content type, which can be manipulated to bypass checks and upload executable scripts. The use of unvalidated POST requests compounds the issue, facilitating unauthorized file manipulation. Mitigation strategies must focus on restricting file types, validating content, and implementing robust authentication checks.

If exploited, the arbitrary file upload vulnerability in OA E-Office LazyUploadify can lead to severe consequences, including server compromise and unauthorized data access. Attackers can execute arbitrary code, leading to data loss, corruption, or disclosure. The ability to upload executable scripts may result in the installation of malware, ransomware, or the establishment of persistent backdoors. Additionally, this vulnerability can be a precursor to further attacks, such as privilege escalation or network infiltration, compromising the integrity and availability of the entire system. Organizations must address this vulnerability to prevent potential exploitation.

REFERENCES

• https://github.com/w-digital-scanner/w9scan/blob/master/plugins/weaver_oa/2158.py