Overview
The cybersecurity landscape is regularly marred by the discovery of new vulnerabilities. One such critical vulnerability, designated as CVE-2025-3621, has been discovered in the ActADUR local server product developed by ProTNS. This security flaw has the potential to put a substantial amount of sensitive data at risk and could potentially allow unauthorized users to execute arbitrary code on host systems. Given the widespread use of ActADUR in various IT infrastructures, this vulnerability is a serious concern that merits immediate attention.
Vulnerability Summary
CVE ID: CVE-2025-3621
Severity: Critical (CVSS Score: 9.6)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
A new way to communicate
Ameeba Chat is built on encrypted identity, not personal profiles.
Message, call, share files, and coordinate with identities kept separate.
- • Encrypted identity
- • Ameeba Chat authenticates access
- • Aliases and categories
- • End-to-end encrypted chat, calls, and files
- • Secure notes for sensitive information
Private communication, rethought.
Product | Affected Versions
ActADUR Local Server | Versions from v2.0.1.9 to v2.0.2.0
How the Exploit Works
The vulnerability stems from several weaknesses in the ActADUR local server product. Firstly, the system fails to neutralize special elements used in a command, allowing command injection. Additionally, the use of hard-coded credentials allows unauthorized users to gain access to the system. Furthermore, the system has flaws in its authentication process, and it binds to an unrestricted IP address, both of which contribute to the overall vulnerability of the system.
Conceptual Example Code
The following is a simplified example of how an attacker could exploit this vulnerability:
POST /ActADUR/endpoint HTTP/1.1
Host: vulnerable.system.com
Content-Type: application/json
{
"command": "; rm -rf /;"
"credentials": "hardcoded_user:hardcoded_password"
}In this example, the attacker sends a JSON payload containing a command to delete all files in the system’s root directory, taking advantage of the command injection vulnerability. The hardcoded credentials are also used to bypass the system’s authentication process.
Mitigation
Users are strongly advised to update their ActADUR local server product to version v2.0.2.0 or above. In the meantime, as a temporary mitigation, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) may be used. ProTNS has released a patch to address this vulnerability, and users are urged to apply this patch as soon as possible to protect their systems and maintain the integrity of their data.