Weaver E-Office Unrestricted File Upload Scanner

Weaver E-Office is a widely used software application, primarily utilized by organizations for managing their e-office operations efficiently. It serves a crucial role in facilitating paperless offices, document management, and workflow automation. Typically employed by large enterprises, government institutions, and educational organizations, it ensures seamless office operations. The software is appreciated for its user-friendly interface and customizable features, accommodating a diverse set of requirements across business and governmental entities. By integrating various office functions, Weaver E-Office supports productivity enhancement and operational efficiencies. Its deployment is often overseen by IT departments or dedicated personnel specializing in office management technologies.

The arbitrary file upload vulnerability is a critical security flaw that allows unauthorized users to upload files without proper validation. This can lead to the execution of malicious files, potentially compromising the system's security and integrity. The flaw could enable attackers to insert scripts that execute commands on the server, leading to data breaches or further unauthorized access. The vulnerability is especially dangerous as it can serve as a gateway for more severe attacks, including remote code execution. Exploiting this flaw is relatively straightforward, making it a prime target for cybercriminals. It poses significant risks if not addressed promptly, potentially impacting the confidentiality, integrity, and availability of the affected systems.

In the specific case of Weaver E-Office, the vulnerability lies in its file upload endpoint. The software's file upload function does not sufficiently validate incoming file types, allowing potentially harmful files to be uploaded. Attackers can craft a multipart/form-data POST request to the vulnerable endpoint, bypassing constraints meant to ensure only safe file types are accepted. Once uploaded, these files can be accessed via predictable URL patterns, making it easy for attackers to execute them. Moreover, the vulnerability does not involve complex parameters, further simplifying the attack process. This lack of proper restrictions on file uploads makes the system highly susceptible to exploitation.

Exploiting the arbitrary file upload vulnerability in Weaver E-Office can lead to severe consequences, including unauthorized remote access to sensitive files and directories. It could allow attackers to gain a foothold within the network, executing further attacks internally. Once inside, attackers can alter, delete, or steal confidential data, potentially resulting in significant financial losses and reputational damage for the organization. The vulnerability can also be leveraged to deploy ransomware, leading to data encryption and extortion attempts. Ultimately, if left unpatched, it undermines the entire security posture of the affected system, creating an opening for additional vulnerabilities to be exploited.

REFERENCES

• https://github.com/RCEraser/cve/blob/main/Weaver.md