CVE-2023-30188 : Security Advisory and Response

A Memory Exhaustion vulnerability in ONLYOFFICE Document Server 4.0.3 through 7.3.2 has been identified, allowing remote attackers to cause a denial of service via a crafted JavaScript file.

Understanding CVE-2023-30188

This section will cover the details of the vulnerability, its impact, technical aspects, and steps to mitigate the risk.

What is CVE-2023-30188?

CVE-2023-30188 is a Memory Exhaustion vulnerability found in ONLYOFFICE Document Server versions 4.0.3 through 7.3.2. Remote attackers can exploit this flaw via a specially crafted JavaScript file, leading to a denial of service.

The Impact of CVE-2023-30188

The vulnerability can be exploited remotely, potentially resulting in a denial of service condition for the affected ONLYOFFICE Document Server instances. This could disrupt services and impact the availability of the server.

Technical Details of CVE-2023-30188

Understanding the specifics of the vulnerability is crucial to implementing effective mitigation strategies.

Vulnerability Description

The Memory Exhaustion vulnerability in ONLYOFFICE Document Server allows attackers to exhaust server memory by leveraging a specially crafted JavaScript file.

Affected Systems and Versions

Versions 4.0.3 through 7.3.2 of ONLYOFFICE Document Server are impacted by this vulnerability.

Exploitation Mechanism

Remote attackers can trigger the vulnerability by sending malicious requests containing the crafted JavaScript file to the vulnerable server, leading to memory exhaustion.

Mitigation and Prevention

Taking immediate and proactive measures can help prevent exploitation of CVE-2023-30188.

Immediate Steps to Take

Update to the latest version of ONLYOFFICE Document Server that addresses the Memory Exhaustion vulnerability.
Implement network controls to restrict access to the server from untrusted sources.

Long-Term Security Practices

Regularly monitor security advisories for ONLYOFFICE Document Server to stay informed about potential vulnerabilities.
Conduct periodic security assessments and audits to identify and address any security gaps.

Patching and Updates

Apply patches provided by ONLYOFFICE promptly to ensure that your Document Server is protected against known vulnerabilities.