Horizon Alert
Summary of the vulnerability and why it matters
The VMware Tools component is vulnerable due to an authentication flaw. This weakness allows a compromised host system to bypass authentication for operations directed at a virtual machine. The primary business impact involves the potential compromise of data confidentiality and integrity within affected virtual machines.
- Vulnerable component: VMware Tools
- Core weakness: Authentication bypass flaw
- Main business impact: Guest VM data confidentiality and integrity compromised
Attack Path
How an attacker could exploit the issue
A fully compromised ESXi host can bypass authentication for host-to-guest operations through VMware Tools. This impacts the confidentiality and integrity of the guest virtual machine. The attack requires an attacker to already have root-level access on the ESXi host.
- Exposure condition: Compromised ESXi host
- Attacker starting point: Root access on ESXi
- Trigger and result: Force VMware Tools failure, impact guest data
Live Threat
Current exploitation, exposure, and threat context
The identified vulnerability impacts the confidentiality and integrity of guest virtual machines by allowing a compromised ESXi host to bypass authentication for host-to-guest operations. This could lead to unauthorized access or modification of data within the virtual machine. The exploitation requires a high level of access and technical skill.
- Attacker needs root access on ESXi.
- Exploitation requires a compromised host.
- Business risk is considered low.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability impacts the confidentiality and integrity of guest virtual machines when an ESXi host is fully compromised. Attackers can exploit this to bypass authentication for host-to-guest operations.
- Identify ESXi hosts and VMware Tools.
- Restrict host-to-guest operations.
- Apply vendor updates and validate.
- Monitor for related activity.
