CVE-2023-30186 Explained : Impact and Mitigation

A detailed look at the use after free issue discovered in ONLYOFFICE DocumentServer 4.0.3 through 7.3.2 that allows remote code execution via a crafted JavaScript file.

Understanding CVE-2023-30186

This section provides an insight into the vulnerability, its impact, affected systems, technical details, and mitigation strategies.

What is CVE-2023-30186?

The CVE-2023-30186 is a use after free vulnerability found in ONLYOFFICE DocumentServer versions 4.0.3 through 7.3.2. It enables malicious actors to execute arbitrary code by leveraging a specially crafted JavaScript file.

The Impact of CVE-2023-30186

The impact of this vulnerability is severe as it allows remote attackers to run arbitrary code on affected systems, potentially leading to unauthorized access, data theft, or system compromise.

Technical Details of CVE-2023-30186

This section delves into the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The use after free flaw in ONLYOFFICE DocumentServer allows remote attackers to execute arbitrary code on vulnerable systems by sending a specially crafted JavaScript file.

Affected Systems and Versions

All versions of ONLYOFFICE DocumentServer from 4.0.3 to 7.3.2 are affected by this vulnerability. Users running these versions are advised to take immediate action.

Exploitation Mechanism

The exploitation of CVE-2023-30186 involves sending a malicious JavaScript file to the target system, causing the application to mishandle memory and execute arbitrary code.

Mitigation and Prevention

In this section, we discuss the steps to mitigate the risks associated with CVE-2023-30186 and prevent future occurrences.

Immediate Steps to Take

Organizations should update their ONLYOFFICE DocumentServer to a patched version immediately to mitigate the risk of exploitation. Additionally, implementing network security measures can help prevent unauthorized access.

Long-Term Security Practices

Practicing secure coding, regularly updating software, performing security audits, and educating users on safe browsing habits are essential for long-term security.

Patching and Updates

Stay informed about security updates released by ONLYOFFICE and apply patches promptly to ensure your systems are protected from known vulnerabilities.