Horizon Alert
Summary of the vulnerability and why it matters
The vSphere Client (HTML5), a component of VMware vCenter Server and VMware Cloud Foundation, contains a vulnerability that allows for the improper validation of URLs. This weakness can enable a malicious actor to conduct requests on behalf of the server. The primary risk is the potential disclosure of sensitive information.
- VMware vCenter Server and Cloud Foundation
- Improper URL validation
- Information disclosure
Attack Path
How an attacker could exploit the issue
A vulnerability in the vSphere Client allows an attacker to access the system without authentication. The attacker can send a crafted POST request to a vCenter Server plugin. This action triggers a server-side request forgery, leading to the disclosure of sensitive information.
- Network access to port 443 required.
- Unauthenticated POST request triggers vulnerability.
- Results in information disclosure.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability exists in vCenter Server and Cloud Foundation that could allow unauthorized access to sensitive information. This exploit targets specific URL validation flaws within a vCenter Server plugin. Successful exploitation could lead to disclosure of internal data, posing a risk to the organization's information assets.
- Attackers require no special skills.
- Network access to port 443 is needed.
- Business risk is moderate; not urgent.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A server-side request forgery vulnerability exists in vCenter Server plugins, potentially allowing unauthorized actors to disclose information. Organizations should prioritize identifying and mitigating systems affected by this vulnerability. The current impact on business operations is medium severity, with a known exploit present in the wild.
- Identify affected vCenter Server and Cloud Foundation assets.
- Reduce exposure to the vulnerable plugin.
- Apply vendor updates and validate.
