Overview
The cybersecurity landscape has been hit by another significant vulnerability, this time within the SolarWinds Web Help Desk. The vulnerability, identified as CVE-2024-28988, is a Java Deserialization Remote Code Execution vulnerability that permits an attacker to execute commands on the host machine. This flaw affects all versions of the Web Help Desk software, posing a considerable risk to businesses that rely on this software for their IT service management. The seriousness of the situation is underlined by the potential for system compromise or data leakage, underscoring the importance of swift mitigation.
Vulnerability Summary
CVE ID: CVE-2024-28988
Severity: Critical (9.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
SolarWinds Web Help Desk | All Versions
How the Exploit Works
The Java Deserialization Remote Code Execution vulnerability occurs when an application deserializes data from an untrusted source without proper validation. In the case of CVE-2024-28988, the exploit involves sending a malicious serialized object to the Web Help Desk. The software then deserializes this object, which can include code designed to execute commands on the host machine. The vulnerability is particularly dangerous because it can be exploited without authentication.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability might be exploited in an HTTP request:
POST /WebHelpDesk/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/java-serialized-object
{ "serialized_object": "base64_encoded_malicious_payload" }In the example above, an attacker sends a POST request to a vulnerable endpoint of the Web Help Desk. The content type is set to `application/java-serialized-object`, and the body of the request contains a base64 encoded serialized object that includes a malicious payload. After the Web Help Desk receives this request, it deserializes the object, causing the malicious payload to be executed.
Mitigation
SolarWinds has released a patch to address this vulnerability. All customers are strongly advised to apply the patch as soon as possible. For temporary mitigation, use a Web Application Firewall (WAF) or Intrusion Detection System (IDS). However, these are only stopgap measures and can’t replace the patch update, which completely resolves the vulnerability. We extend our thanks to Trend Micro’s Zero Day Initiative (ZDI) for their partnership in responsibly disclosing this vulnerability.
