CVE-2025-28238: Session Hijacking Vulnerability in Elber REBLE310 Firmware

Overview

The Common Vulnerabilities and Exposures (CVE) system has identified a critical vulnerability – CVE-2025-28238, within Elber REBLE310 Firmware v5.5.1.R. This vulnerability, characterized by improper session management, has the potential to allow malicious attackers to execute a session hijacking attack, leading to system compromise or data leakage. The severity of this vulnerability, rated at a high CVSS score of 9.8, underscores its potential to have a severe impact on organizations using affected versions of this firmware.

Vulnerability Summary

CVE ID: CVE-2025-28238
Severity: Critical (9.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

Product | Affected Versions

Elber REBLE310 Firmware | v5.5.1.R

How the Exploit Works

The vulnerability CVE-2025-28238 arises from improper session management in Elber REBLE310 Firmware. When an authenticated user initiates a session, the system does not adequately manage or terminate this session. This flaw provides an opportunity for attackers to hijack the session by gaining unauthorized access to session tokens or IDs. Once an attacker has control, they can masquerade as the authenticated user, possibly leading to unauthorized actions such as system compromise or data leakage.

Conceptual Example Code

The following is a conceptual example demonstrating how the vulnerability might be exploited. In this scenario, an attacker intercepts the HTTP request of an authenticated session and reuses the session ID to impersonate the legitimate user.

GET /resource_endpoint HTTP/1.1
Host: target.example.com
Cookie: session_id=1234567890

The attacker can then send requests on behalf of the authenticated user, leading to unauthorized actions.

POST /action_endpoint HTTP/1.1
Host: target.example.com
Cookie: session_id=1234567890
{ "malicious_action": "data_leakage" }

Recommendations for Mitigation

To mitigate against this vulnerability, it is recommended to apply the vendor patch as soon as it becomes available. In the absence of a vendor patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation, detecting and possibly preventing attempts at session hijacking. Furthermore, strengthening session management practices, such as enforcing session timeouts and regularly rotating session tokens, can enhance the overall security of the system against such attacks.