Table of Contents
February 5, 2025
|6m
How to Fix CVE-2025-0364: Protect BigAntSoft BigAnt Server from Critical Unauthenticated Remote Code Execution Vulnerability?
BigAntSoft BigAnt Server, a popular communication and collaboration platform, has recently been identified as having a critical security vulnerability. This flaw, designated as CVE-2025-0364, allows an unauthenticated remote attacker to execute arbitrary code on the affected server. This article provides security professionals with a comprehensive guide on understanding and mitigating this severe vulnerability to protect their BigAntSoft BigAnt Server deployments. We will delve into the technical details of the vulnerability, its potential impact, and, most importantly, the steps you can take to fix or mitigate it. This guide is aimed at helping security professionals remediate the vulnerability and protect their products from being exploited.
A Short Introduction to BigAntSoft BigAnt Server
BigAntSoft BigAnt Server is a communication and collaboration platform designed for businesses to facilitate internal and external communication. It offers features such as instant messaging, group chat, file sharing, and task management, aiming to streamline workflow and improve team collaboration. BigAntSoft BigAnt Server can be deployed on-premises, giving organizations greater control over their data and security.
Summary of CVE-2025-0364
CVE ID: CVE-2025-0364
Description: Unauthenticated remote code execution via account registration in BigAntSoft BigAnt Server.
CVSS Score: 9.8 (Critical)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
BigAntSoft BigAnt Server, in versions up to and including 5.6.06, is susceptible to an unauthenticated remote code execution vulnerability. This flaw allows a remote attacker to create an administrative user through a publicly exposed SaaS registration mechanism. Upon successfully creating an administrative account, the attacker can then leverage the "Cloud Storage Addin" to upload and execute arbitrary PHP code. The vulnerability stems from a failure to properly secure the registration process, enabling unauthorized users to gain administrative privileges. For more information, you can check CVE details.
Impact of CVE-2025-0364
The impact of CVE-2025-0364 is severe. An unauthenticated attacker can gain full administrative access to the BigAnt Server and execute arbitrary code remotely. This can lead to complete system compromise, allowing the attacker to steal sensitive data, manipulate or destroy critical information, install malware, or use the compromised server as a launching point for further attacks within the network. The vulnerability poses a critical risk to the confidentiality, integrity, and availability of affected systems and the broader network infrastructure. Due to the ease of exploitation and the high degree of control gained, this vulnerability should be addressed immediately. The ability to create admin users without authentication makes this flaw very dangerous. This highlights the importance of patch management.
Products Affected by CVE-2025-0364
The following product versions are affected by CVE-2025-0364:
|
Product
|
Version(s) Affected
|
|---|---|
|
BigAntSoft BigAnt Server
|
Up to and including 5.6.06
|
It is important to note that versions of BigAntSoft BigAnt Server later than 5.6.06 may also be affected if the underlying vulnerability has not been addressed in subsequent releases. Users are advised to monitor official channels for any security updates or patches related to this vulnerability, even if they are running a version later than 5.6.06. If there are indications that the registration mechanism or Cloud Storage Addin remain vulnerable, consider implementing the mitigations described further below.
How to Check Your Product is Vulnerable?
Identifying whether your BigAntSoft BigAnt Server deployment is vulnerable to CVE-2025-0364 is crucial. Here are a few ways to check:
Version Verification: Log in to the BigAntSoft BigAnt Server administration interface and check the software version. If the version is 5.6.06 or earlier, the server is vulnerable.
SaaS Registration Check: Attempt to register a new account through the publicly exposed SaaS registration mechanism. If you can successfully create an account, the server might be vulnerable. Further investigation is needed to confirm administrative privileges.
Administrative Access Test: After creating a new account via the SaaS registration, attempt to access administrative features or settings. If you can access these features without proper authentication, the server is likely vulnerable.
Cloud Storage Addin Test: If administrative access is gained, try uploading and executing a simple PHP script using the "Cloud Storage Addin." If the script executes successfully, the server is vulnerable to remote code execution.
Network Traffic Analysis: Monitor network traffic for requests to the SaaS registration endpoint. Unusual or excessive requests could indicate exploitation attempts. Review server logs for unauthorized account creation or suspicious activity related to the "Cloud Storage Addin." This can be achieved through security logging.
How to Fix the Vulnerability?
As of the vulnerability disclosure, there is no mention of an available patch from BigAntSoft. Until a patch is released, consider the following mitigation steps to reduce the risk of exploitation:
Disable SaaS Registration: If the SaaS registration mechanism is not required for your organization, disable it to prevent unauthorized account creation. This will effectively close the attack vector.
Implement Network Segmentation: Implement strong network segmentation to limit access to the BigAnt Server. Restrict access to trusted networks and users only.
Web Application Firewall (WAF): Use a WAF to filter malicious requests to the BigAnt Server. Configure the WAF to block requests targeting the SaaS registration endpoint or containing suspicious PHP code.
Monitor for Unauthorized Account Creation: Continuously monitor user accounts for any unauthorized creations. Implement alerts for new account creation events and investigate any suspicious activity.
Restrict Access to Cloud Storage Addin: If possible, disable or restrict access to the "Cloud Storage Addin" feature to prevent attackers from uploading and executing arbitrary code.
Take the Server Offline (Temporary): If the risk is deemed too high and other mitigation steps are not sufficient, consider temporarily taking the BigAnt Server offline until a patch is available.
Regularly Audit User Accounts: Regularly audit user accounts, especially those with administrative privileges, to ensure that no unauthorized accounts exist.
Implement Multi-Factor Authentication (MFA): If possible, implement MFA for all user accounts, including administrative accounts, to add an extra layer of security against unauthorized access.
Monitor Official Channels: Monitor official channels, such as the BigAntSoft website and security advisories, for any security updates or patches related to this vulnerability. Apply any patches as soon as they become available. This highlights the need for a PSIRT.
Input Validation and Sanitization: Review and enhance input validation and sanitization processes for all user-supplied data to prevent malicious code from being injected into the system. Consider using SOAR.
By implementing these mitigation steps, security professionals can significantly reduce the risk of exploitation and protect their BigAntSoft BigAnt Server deployments from CVE-2025-0364. It is essential to remain vigilant and monitor for any signs of exploitation attempts. You can use threat intelligence for this purpose.
Found this article interesting? Keep visit thesecmaster.com, and our social media page on Facebook, LinkedIn, Twitter, Telegram, Tumblr, Medium, and Instagram and subscribe to receive tips like this.
You may also like these articles:
Arun KL
Arun KL is a cybersecurity professional with 15+ years of experience in IT infrastructure, cloud security, vulnerability management, Penetration Testing, security operations, and incident response. He is adept at designing and implementing robust security solutions to safeguard systems and data. Arun holds multiple industry certifications including CCNA, CCNA Security, RHCE, CEH, and AWS Security.
