Source: cve@mitre.org
op5 Monitor and op5 Appliance before 5.5.0 do not properly manage session cookies, which allows remote attackers to have an unspecified impact via unspecified vectors.
op5 Monitor and op5 Appliance versions prior to 5.5.0 suffer from a session cookie management vulnerability, enabling remote attackers to potentially gain unauthorized access or control of the system. This flaw allows attackers to bypass authentication or hijack existing sessions, leading to data breaches or system compromise. Immediate patching and mitigation strategies are crucial to prevent exploitation.
Step 1: Reconnaissance: The attacker identifies a vulnerable op5 Monitor or Appliance instance, likely through port scanning or vulnerability scanning.
Step 2: Session Cookie Manipulation: The attacker crafts a malicious request to the op5 Monitor/Appliance, potentially setting a known or predictable session cookie value. This could involve exploiting a flaw in how the system generates or handles cookies.
Step 3: User Interaction (Session Fixation): The attacker lures a legitimate user to access the op5 Monitor/Appliance using the manipulated cookie (session fixation). Alternatively, the attacker attempts to steal a valid cookie from a legitimate user (session hijacking).
Step 4: Authentication Bypass/Session Hijacking: The attacker leverages the manipulated or stolen cookie to bypass authentication or hijack the user's active session. This allows the attacker to access the system with the privileges of the targeted user.
Step 5: Privilege Escalation (Potential): Depending on the attacker's goals and the user's privileges, they may attempt to escalate their privileges within the op5 Monitor/Appliance environment.
The vulnerability stems from inadequate session cookie handling within op5 Monitor and Appliance. The software likely fails to properly invalidate or secure session cookies, potentially allowing attackers to reuse or predict them. This could involve issues like insufficient cookie attributes (e.g., lack of HttpOnly or Secure flags), predictable cookie generation, or improper cookie expiration handling. The root cause is a flaw in the session management logic, leading to a weakness in the authentication and authorization process. This could manifest as a session fixation attack, where an attacker sets a known cookie value and then tricks a user into using it, or a session hijacking attack, where an attacker steals a valid cookie.
Due to the lack of specific details, it is difficult to attribute this vulnerability to specific Advanced Persistent Threats (APTs) or malware campaigns. However, any vulnerability that allows for remote access is attractive to a wide range of threat actors. The CISA KEV (Known Exploited Vulnerabilities) status is unknown due to the age and lack of specific details. However, given the potential for remote code execution or unauthorized access, it is reasonable to assume that this vulnerability could be exploited by various threat actors, including those seeking to establish a foothold within a network or steal sensitive data.
Monitor web server logs for suspicious activity, such as unusual cookie values or repeated login attempts.
Analyze network traffic for unusual HTTP requests, particularly those involving session cookies.
Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) with rules to detect potential session hijacking or cookie manipulation attempts.
Monitor for unauthorized access to sensitive data or system resources.
Review authentication logs for anomalies, such as multiple failed login attempts followed by a successful login using a potentially compromised session cookie.
Use a web application firewall (WAF) to filter malicious requests and protect against session-related attacks.
Upgrade op5 Monitor and op5 Appliance to version 5.5.0 or later.
Implement the latest security patches provided by the vendor.
Configure web server to use HttpOnly and Secure flags for session cookies to prevent client-side script access and ensure cookies are only transmitted over HTTPS.
Implement strong password policies and multi-factor authentication (MFA) to mitigate the impact of compromised credentials.
Regularly review and audit system logs for suspicious activity.
Conduct penetration testing and vulnerability assessments to identify and address security weaknesses.
Implement a web application firewall (WAF) to filter malicious requests and protect against session-related attacks.