Overview
The CVE-2021-47662 vulnerability represents a significant security threat, allowing an unauthenticated remote attacker to potentially trigger a DoS (Denial of Service) attack. This can be accomplished by simply connecting via HTTPS and triggering the shutdown button, causing system disruption and potential compromise. Given its severity, it is of utmost importance for affected users to understand and mitigate this vulnerability.
Vulnerability Summary
CVE ID: CVE-2021-47662
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
[Product] | [Version]
[Product] | [Version]
(Note: The actual product and version information would need to be obtained from the source data)
How the Exploit Works
An unauthenticated remote attacker can exploit this vulnerability by establishing an HTTPS connection to the target system and triggering the shutdown function. This could be achieved through crafted network packets or via a malicious web request. Due to missing authorization, the system fails to validate the identity of the attacker, resulting in a DoS condition.
Conceptual Example Code
Here’s an example of a malicious HTTP request that might be used to exploit this vulnerability:
GET /shutdown HTTP/1.1
Host: target.example.comIn this simplified example, the attacker sends a GET request to the shutdown endpoint of the target system. As there is no proper authorization in place, the system incorrectly processes the request, leading to a shutdown and consequently, a denial of service.
Mitigation and Response
Users are advised to update their systems with the latest vendor patches as soon as they are available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could be used as a temporary mitigation measure. These systems can provide an additional layer of security by detecting and preventing unauthorized access attempts and malicious traffic.
It is also recommended to implement proper authorization checks for critical system functions and to restrict network access to these functions to trusted entities only. Regularly monitoring system logs can also aid in early detection of any suspicious activity.
