External risk intelligence

BlackBoard Arbitrary File Upload Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2024-51367

The vulnerability exists in a web application component where file upload functionality is often exposed to users. As a web-based application, it is commonly deployed in environments where such interfaces are reachable via the network to facilitate user interaction, making it a likely candidate for public internet exposure.

Code Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical vulnerability in BlackBoard v2.0.0.2, specifically related to how the software handles file uploads. The flaw could potentially allow unauthorized code execution if a malicious file is uploaded. The main concern is to confirm if our environment is running this specific version and if the affected component is exposed.

File upload flaw allows code execution.
Critical flaw impacts web application component.
Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by uploading a malicious XML file through a file upload feature present in the BlackBoard application. This crafted file can lead to the execution of arbitrary code on the system, posing a significant security risk.

Unauthenticated network access required.
Upload a crafted XML file.
Arbitrary code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to execute arbitrary code by uploading a malicious XML file to a specific component within BlackBoard. This could lead to unauthorized access and control over the affected system, potentially impacting its integrity and availability.

Arbitrary code execution.
Uploading a crafted file.
System compromise and control.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in BlackBoard's file upload functionality necessitates immediate attention from the application owner and potentially the infrastructure or platform teams responsible for its deployment. The first practical step is to identify all instances of BlackBoard v2.0.0.2, determine their network exposure and criticality, and assign an owner for remediation planning.

Application owners should manage the issue.
Verify BlackBoard instances and exposure.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is BlackBoard and its role in an organization?

BlackBoard is a software application designed to manage user-related data and administrative tasks. The specific component mentioned, Users\username.BlackBoard, serves as a functional interface within version 2.0.0.2. Organizations typically deploy this software to handle data processing or user-specific records, making it a central point for interaction that requires careful management of incoming data streams.

How does CVE-2024-51367 create a security weakness?

This vulnerability is classified as CWE-94, which refers to Improper Control of Generation of Code. In plain English, the application fails to safely validate or handle files submitted by users. Because the software accepts and processes a crafted .xml file without sufficient restrictions, it inadvertently allows an attacker to inject and execute their own code, essentially tricking the system into running unauthorized instructions.

What triggers the arbitrary file upload vulnerability?

An attacker triggers this flaw by sending a specially crafted .xml file to the vulnerable component. The vulnerability requires network access to the upload function, but it does not trigger through legitimate, non-malicious file types or standard system operations. If the application settings prevent the upload or execution of XML-based data structures, the specific attack path described in this CVE cannot be successfully completed.

Do I need to worry if my BlackBoard instance is internal?

Halo Surface Signal indicates that because this is a web-based application, it is often deployed in network-accessible environments, making public internet exposure a significant concern. While internal instances face a lower risk than those facing the internet, any application reachable over a network should be evaluated. You should assess whether your specific deployment is reachable by untrusted users, as this impacts the likelihood of an attacker reaching the file upload feature.

When should I take action for this vulnerability?

You should prioritize this immediately if you run BlackBoard v2.0.0.2. The first step is to perform an inventory of all servers to locate instances of this specific version. Once identified, work with the team responsible for the application to evaluate its network connectivity and criticality. This ensures you understand which systems require the most urgent attention and allows you to plan your remediation steps based on actual usage.

References

github.com/Gelcon/PoCofBlackBoard2.0.0.2

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.