Overview
A new and critical vulnerability, CVE-2023-47294, has been recently discovered in NCR Terminal Handler v1.5.1. This vulnerability could allow low-level privileged, authenticated attackers to manipulate user accounts, including deactivation, locking, and deletion. The attack is carried out through a uniquely crafted session cookie. The implications of this vulnerability are far-reaching, affecting a variety of organizations utilizing NCR Terminal Handler for their operations. The severity of this vulnerability underscores the importance of taking immediate action to mitigate potential system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2023-47294
Severity: Critical (CVSS Score: 8.1)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: User account manipulation leading to potential system compromise or data leakage
Affected Products
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Product | Affected Versions
NCR Terminal Handler | v1.5.1
How the Exploit Works
This exploit works by an attacker crafting a malicious session cookie that is then sent to the NCR Terminal Handler. Because of the flaw in the software’s security, it fails to properly validate the authenticity and integrity of the session cookie. As such, an attacker can manipulate the session cookie to impersonate a legitimate user. This results in unauthorized access to the system, with the ability to perform actions based on the privileges of the compromised user account, including deactivation, locking, and deletion of user accounts.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. This pseudocode represents the crafting of a malicious session cookie:
POST /ncr/terminal/handler/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
Cookie: session_id=<crafted_session_id>
{
"action": "delete_user",
"user_id": "<targeted_user_id>"
}In this example, “ represents a session cookie that has been manipulated by an attacker, and “ represents the ID of the user account an attacker aims to manipulate.
Remember, this is just a conceptual example and the actual exploit may require more complex steps and understanding of the system.
Mitigation Guidance
It is highly recommended to apply the vendor patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can help provide temporary mitigation against this vulnerability. These systems can be configured to detect and block requests containing suspicious or known malicious session cookies.
Regularly updating and patching your systems, employing robust security measures, and using intrusion detection systems are critical steps in protecting your systems from such vulnerabilities.