Horizon Alert
Summary of the vulnerability and why it matters
A command injection vulnerability has been identified in Tenable Identity Exposure's Active Directory Events Listener. This flaw could allow an authenticated attacker to execute commands with system-level privileges on a primary domain controller. The main concern is to confirm if this specific component is in use within the organization and assess any potential exposure.
- Authenticated users can run unauthorized commands.
- Affects identity and access management oversight.
- Confirm relevance and assess organizational exposure.
Attack Path
How an attacker could exploit the issue
An attacker with authenticated, low-level access could exploit a vulnerability within the Active Directory Events Listener to execute commands. This component, part of Tenable Identity Exposure, is accessible within the network. Successful exploitation allows the attacker to run arbitrary commands with SYSTEM privileges on a primary domain controller, potentially leading to a complete compromise of the domain.
- Authenticated, low-privileged access required.
- Attacker triggers vulnerability via the Events Listener.
- Risk of arbitrary command execution as SYSTEM.
Live Threat
Current exploitation, exposure, and threat context
An authenticated attacker with low privileges could potentially execute arbitrary commands as SYSTEM on a Primary Domain Controller Emulator (PDCE). This could affect the integrity and availability of critical domain services.
- SYSTEM commands on PDCE at risk.
- Attacker executes commands via listener.
- Domain services integrity compromised.
Operational Fix
Recommended remediation, mitigation, and detection steps
This critical command injection vulnerability in Tenable Identity Exposure's Active Directory Events Listener impacts the confidentiality, integrity, and availability of the Primary Domain Controller Emulator. Action likely falls to the security team responsible for identity and access management solutions and the infrastructure team managing Active Directory, with potential coordination required with vendor management if Tenable Identity Exposure is managed externally. The initial practical step is to identify all instances of Tenable Identity Exposure, confirm their reachability and business criticality, and then engage the accountable owners to plan remediation based on the assessed risk.
- Identity and security teams own resolution.
- Verify Tenable Identity Exposure instances.
- Plan remediation based on assessed risk.
