Product Overview
The Tenable’s Passive Vulnerability Scanner™ (PVS™) is a patented network discovery and
vulnerability analysis technology that delivers continuous network scanning and profiling
non-intrusively. PVS monitors IPv4, IPv6 and mixed network traffic at the packet layer to determine
topology, services and vulnerabilities. PVS can be used alone to effectively target network
segments or small networks, and is also an integrated component of Tenable’s SecurityCenter
Continuous View™. PVS continuously discovers and tracks users, applications, cloud infrastructure,
trust relationships and vulnerabilities. It also automatically discovers users, infrastructure and
vulnerabilities across operating systems, network devices, hypervisors, databases, tablets, phones,
web servers, cloud applications and critical infrastructure.
Continuous network monitoring
uncovers unauthorized devices,
vulnerabilities and untrusted
relationships with deep packet
PVS Benefits
Core and distinguishing benefits of continuous scanning with PVS include identifying all devices
and applications, identifying their vulnerabilities and detecting BYOD/mobile devices:
• Always know what devices, applications, services and relationships are active on your network
• Protect sensitive systems unavailable to active scans by effectively scanning without
credentials and without possible disruption of service
• Automatically pinpoint potential security risks posed by vulnerable assets and new or
rogue systems
• Demonstrate compliance with both internal policies and key regulatory requirements by
validating configuration management
• Uncover inappropriate use and pinpoint “insider threats” not detectable by perimeter devices
• Focus on incident response by alerting on “real” compromises
• Accelerate threat remediation and eliminate gaps between active scans
• Fill gaps between scheduled active scans with continuous scanning
Key Features
Real-Time Vulnerability Monitoring
Tenable PVS continuously monitors network traffic for a variety of security-related
information including:
Tracking all client and server application vulnerabilities
Identifying when an application is compromised or subverted
Detecting and documenting new hosts added to a network
Discovering when an internal system begins to port scan other systems
Highlighting all interactive and encrypted network sessions
Spotting ports served and which ports browsed for each individual system
Passively determining the operating system of each active host
Detecting vulnerabilities on communicating systems and the protocols and applications used
Summarizing top hosts, vulnerabilities, applications, operating systems and connections
Available support for 10 Gbps networks.
PVS connects to the network segment on a hub, spanned port or network tap and continuously
monitors the data stream, generating real-time alerts and comprehensive reports for the security, IT
and management teams.
The Tenable’s Passive Vulnerability Scanner
delivers real-time network monitoring
and profiling for continuous scanning and
assessment of an organization’s security
in a non-intrusive manner. PVS monitors
network traffic at the packet level to provide
visibility into both server and client-side
vulnerabilities with full asset discovery.
PVS easily installs in networks and passively
detects devices on your network, including
virtual- and cloud- based devices, BYOD/
mobile devices and even discovers
jailbroken iOS devices. PVS scales to meet
future demand of monitoring virtualized
systems, cloud services and the proliferation
of devices.
Network, Web and FTP Monitoring
PVS offers extensive web and FTP activity monitoring through direct
analysis of the packet stream. By passively monitoring any HTTP or FTP
transaction, PVS can determine and report useful information about each
host on your network such as:
All client and server web-based vulnerabilities and applications
Complete list of all web-agents used on each host
Passive enumeration of all files shared via FTP
Real-time logging of every web GET, POST, or file download
Real-time logging of every FTP file GET or PUT
Real-time logging of every DNS query monitor
This data is useful to analyze insider activity, employee activity and
malware infection or advanced threat compromise. Many of these logs
can be sent to the Tenable Log Correlation Engine™ for further analysis,
correlation search and long term storage.
SQL Database Logging & Monitoring
PVS can also look at network traffic and identify SQL devices and the
vulnerabilities associated with them, and log this activity in real-time.
Real-time logs for SQL queries can be sent to the Log Correlation Engine
for search, storage and analysis of attacks, including SQL injection from
web services. Full instrumentation of all SQL activity can be achieved
by combining the PVS data with Nessus® SQL database configuration
and vulnerability auditing data, as well as log data gathered from an SQL
database server with a Log Correlation Engine agent.
Passive Topology Discovery & Service
Identification Analysis
Data analysis for specific client or server vulnerabilities is performed by
reconstructing both sides of network communications. Unique protocols,
such as HTTP, SMTP and FTP, have specific strings that identify the
version of the service. PVS identifies these and associates them with
specific vulnerability plugins or tests.
PCI DSS Compliance
The PCI DSS requires accurate and comprehensive identification of all
systems involved in the transmission, processing, or storage of credit
card data. These systems collectively comprise the “cardholder data
environment” (CDE) where the PCI DSS controls must be consistently
applied and validated on an annual basis. Organizations must also
provide evidence of procedures to maintain the integrity of the CDE.
PVS not only monitors known data flows in/out of the CDE but also
identifies undocumented data flows, particularly of unencrypted
payment card information.
Deployment Options
Agentless Scanning and Clientless Access
PVS offers advanced protocol analysis of the Microsoft SMB protocol.
If PVS is deployed on the interior of a network where it can see Active
Directory network traffic, it can automatically learn:
• Each system’s hostname and workgroup name
• A list of all files shared on any folder
• Logins and file downloads from a network share in real-time
The ability to passively determine this information in real-time has
tremendous forensic and situational awareness value. For large networks,
passively determining all shared folder contents makes identification of
potentially sensitive data much easier. Using SecurityCenter Continuous
View, with the integrated PVS and Log Correlation Engine modules,
enables forensic analysis of employee activity and malware activity by
examining records of files shared over the network.
The Tenable Passive Vulnerability Scanner is available as a selfcontained scanner and as part of SecurityCenter Continuous View.
Perfect for continually scanning a smaller network segment or portion of
a larger network, PVS is available on its own and uniquely provides and
targeted monitoring for highly sensitive networks or network segments.
SecurityCenter Continuous View provides a comprehensive view of
enterprise security by uniquely combing security information and event
management with unlimited active and passive vulnerability scanning.
PVS is also available as an appliance in the USA and Canada to support
10 Gbps networks.
For More Information: Please visit tenable.com
Contact Us: Please email us at subscriptionsales@tenable.com or visit tenable.com/contact
Copyright © 2015. Tenable Network Security, Inc. All rights reserved. Tenable Network Security and Nessus are registered
trademarks of Tenable Network Security, Inc. SecurityCenter and Passive Vulnerability Scanner are trademarks of Tenable Network
Security, Inc. All other products or services are trademarks of their respective owners. EN-JAN282015-V3
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