CVE-2021-43448 : Security Advisory and Response

CVE-2021-43448 involves an Improper Input Validation vulnerability in ALL versions of ONLYOFFICE as of November 8, 2021, potentially allowing attackers to spoof user names in document interactions.

Understanding CVE-2021-43448

What is CVE-2021-43448?

CVE-2021-43448 is an Improper Input Validation vulnerability in ONLYOFFICE, where a lack of input validation could enable attackers to impersonate users by spoofing their names during document interactions.

The Impact of CVE-2021-43448

This vulnerability may lead to unauthorized access and impersonation within document collaborations, compromising the confidentiality and integrity of user interactions.

Technical Details of CVE-2021-43448

Vulnerability Description

The vulnerability arises from a lack of input validation in ONLYOFFICE, which permits spoofing of user names when interacting with documents if the document ID is known.

Affected Systems and Versions

Vendor: N/A
Affected Product: N/A
Vulnerable Versions: All versions of ONLYOFFICE as of November 8, 2021

Exploitation Mechanism

Attackers with knowledge of document IDs can exploit this flaw to impersonate users within document collaborations.

Mitigation and Prevention

Immediate Steps to Take

Implement input validation mechanisms to ensure data integrity and prevent spoofing attacks.
Regularly monitor document interactions for any suspicious activity.

Long-Term Security Practices

Conduct security audits to identify and address vulnerabilities proactively.
Educate users about safe document sharing practices to mitigate risks of impersonation attacks.

Patching and Updates

Apply patches or updates from ONLYOFFICE to fix the vulnerability and enhance security measures.