What is this vulnerability and why does it matter?

This vulnerability, identified as CVE-2024-8451, affects certain switch models from PLANET Technology. It stems from an improper handling of insufficiently authenticated connection requests by the SSH service running on these devices. The core issue allows unauthorized remote attackers to exploit this weakness by occupying available SSH connection slots. This matters significantly because it can lead to a Denial of Service (DoS) condition, preventing legitimate users, such as network administrators, from establishing SSH connections to manage the affected switches. Such a disruption can severely impact network operations, troubleshooting capabilities, and overall system availability, making it a critical concern for network stability and administration.

What are the CVSS score, severity level, and disclosure details?

The CVSS score for CVE-2024-8451 is 7.5. Based on this score, the severity level is classified as High. The vulnerability was publicly disclosed and published on 2024-09-30 at 06:56:40 UTC, and its details were last modified on 2024-09-30 at 17:32:59 UTC.

Which products, vendors, systems, and versions are affected?

The affected vendor is PLANET Technology. The vulnerability impacts "certain switch models" from this vendor. Specific model numbers or version ranges for the affected switches are not provided in the given CVE data.

What is the technical root cause and attack vector?

The technical root cause of this vulnerability lies in the improper handling of insufficiently authenticated connection requests by the SSH service (CWE-280). This flaw allows unauthorized entities to consume a finite resource, specifically SSH connection slots (CWE-400 - Uncontrolled Resource Consumption). The attack vector is remote, meaning an attacker can exploit this vulnerability over a network without requiring physical access to the device, by targeting the SSH service.

How can this vulnerability be exploited?

Unauthorized remote attackers can exploit this vulnerability by sending a high volume of insufficiently authenticated connection requests to the SSH service running on affected PLANET Technology switches. By doing so, they can occupy the limited number of available SSH connection slots. Once these slots are filled, legitimate users attempting to connect via SSH will be unable to establish a connection, effectively leading to a Denial of Service (DoS) for authorized administration and management access.

What mitigation steps and patches are available?

The provided CVE data does not specify any immediate mitigation steps or available patches from PLANET Technology. It is recommended to monitor the vendor's official security advisories and product support pages for updates, firmware upgrades, or workarounds as they become available.

How can vulnerable systems be detected?

Detecting vulnerable systems primarily involves identifying PLANET Technology switch models that expose an SSH service and are susceptible to this flaw. While specific version checks are not provided, organizations should inventory their PLANET Technology switches, particularly those with SSH enabled. Further detection could involve monitoring SSH service behavior; if legitimate users frequently experience connection failures or inability to connect, it might indicate that the SSH connection slots are being occupied by unauthorized requests due to this vulnerability.

What are the indicators of compromise (IOCs)?

The primary indicator of compromise (IOC) for CVE-2024-8451 is the inability of legitimate users to establish SSH connections to affected PLANET Technology switches. This would manifest as:

• Repeated SSH connection failures for authorized users.
• Error messages indicating that no more connections can be established or that the service is busy.
• Unexpected high resource utilization related to the SSH daemon or network connections on the switch.
• Presence of numerous failed authentication attempts or connection requests from unknown or suspicious IP addresses in SSH logs, if logging is sufficiently detailed.

Which threat actors are known to exploit this vulnerability?

The provided CVE data does not specify any known threat actors currently exploiting CVE-2024-8451.

What public intelligence references and advisories exist?

The primary public intelligence reference for this vulnerability is the Common Vulnerabilities and Exposures (CVE) entry itself: CVE-2024-8451. Organizations should regularly consult official security advisories and publications from PLANET Technology, as well as reputable cybersecurity intelligence platforms, for further information and updates regarding this vulnerability.

What is the risk assessment and urgency level?

The risk assessment for CVE-2024-8451 is High, as indicated by its CVSS score of 7.5. The vulnerability allows for a Denial of Service against a critical management interface (SSH) on network switches. The urgency level is also High, especially for organizations that rely on SSH for remote management of their PLANET Technology switches, and where these switches are exposed to potentially untrusted networks. A successful exploit can disrupt network administration and operations, making immediate attention and mitigation planning crucial.