Overview
In this blog post, we are highlighting an important vulnerability that affects the Arista CloudVision Portal (CVP on prem). This vulnerability, identified as CVE-2024-8100, enables an attacker to exploit a time-bound device onboarding token and potentially gain admin privileges on CloudVision. This vulnerability is significant due to the potential severity of its impact, which can lead to a full system compromise or data leakage. As such, it’s crucial for all organizations and individuals using the Arista CloudVision Portal to understand this vulnerability and implement the necessary mitigations.
Vulnerability Summary
CVE ID: CVE-2024-8100
Severity: High (8.7 CVSS)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Admin privilege escalation, potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Arista CloudVision Portal | Vulnerable versions (specific versions not provided)
How the Exploit Works
The exploit works by taking advantage of the time-bound device onboarding token within the Arista CloudVision Portal. Normally, these tokens are meant to provide temporary access for onboarding new devices, but in the affected versions, an attacker can abuse this process to gain admin-level access to CloudVision. This can occur if an attacker can intercept or regenerate the time-bound token, allowing them to onboard a device under their control or modify an existing device’s configuration.
Conceptual Example Code
Exploiting this vulnerability could conceptually look something like this:
POST /api/v1/device/onboard HTTP/1.1
Host: cloudvision.example.com
Content-Type: application/json
Authorization: Bearer {stolen_onboarding_token}
{
"hostname": "malicious-device",
"ip_address": "192.0.2.0",
"admin_password": "new_admin_password"
}In this example, the attacker uses a stolen onboarding token (`{stolen_onboarding_token}`) to register a new device (`malicious-device`) with their chosen admin password (`new_admin_password`). This allows the attacker to gain administrative access to the CloudVision Portal.
Mitigation
The best course of action to resolve this vulnerability is to apply the vendor-supplied patch. If that’s not immediately possible, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These tools can monitor for suspicious activity and block potential exploit attempts. However, these should only be considered temporary solutions until the official patch can be applied. Regular software updates and patching are key to maintaining a secure IT environment.