Horizon Alert
Summary of the vulnerability and why it matters
VMware vCenter Server, specifically the rhttproxy component, has a vulnerability stemming from an inadequate implementation of URI normalization. This flaw allows an unauthorized actor, who can access vCenter Server over the network on port 443, to bypass the proxy. Such a bypass could grant access to internal endpoints, potentially exposing sensitive system information or operations. This could create a risk for affected organizations by compromising internal resources through unauthorized access.
- Vulnerable component: VMware vCenter Server rhttproxy
- Core weakness: Improper URI normalization
- Main business impact: Unauthorized access to internal endpoints
Attack Path
How an attacker could exploit the issue
A vulnerability in vCenter Server's rhttpproxy component allows a malicious actor to bypass proxy controls. This is due to an improper implementation of URI normalization. An attacker with network access to port 443 on vCenter Server can exploit this to access internal endpoints.
- Network access to port 443 required
- Malicious actor bypasses proxy
- Internal endpoints are accessed
Live Threat
Current exploitation, exposure, and threat context
The vulnerability in vCenter Server allows a malicious actor with network access to bypass the proxy and access internal endpoints. This could lead to unauthorized access to sensitive information or systems. The known exploited vulnerabilities catalog lists this CVE, indicating it has been actively targeted. Organizations should treat this as urgent and apply updates as recommended by the vendor.
- Likely attacker skill level: Moderate.
- Required access or conditions: Network access.
- Business risk or urgency: High, actively exploited.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
An improper implementation of URI normalization in vCenter Server could allow a malicious actor to bypass the proxy and access internal endpoints. This vulnerability presents a risk to organizations by potentially exposing internal systems and data to unauthorized access. Understanding which assets are affected is the first step in mitigating this risk.
- Find affected vCenter Server assets.
- Reduce exposure or isolate risk.
- Fix, verify, and monitor.
