Attacks/Breaches
6/11/2010
12:54 AM
100%
0%

The Truth About Vulnerability Scanners

Scanning tools can help detect vulnerabilities, but they shouldn't be the only tools on your belt. Here's a look at three areas where scanners fall short

Excerpted from "Scanning Reality: Limits of Automated Vulnerability Scanners," a new report posted today in Dark Reading's Vulnerability Management Tech Center.

In some enterprises, the term "vulnerability management" begins and ends with scanning tools. For these enterprises, improving vulnerability management simply means bringing in more scanners to ensure a broad view.

But are network-based vulnerability scanners and Web application scanning tools enough to ensure that your organization will identify and remediate its security vulnerabilities -- before they are exploited by the bad guys? We submit that most IT organizations have a limited understanding of what these tools can do -- and where they fall short.

There are three key limitations of vulnerability scanners. Some of the risks around these problems can be mitigated by incorporating additional technologies into your vulnerability management program, while others are beyond the scope of any automated technology.

Whatever mitigation strategy is used to fill the gap left by these scanners, the first step is to understand their shortcomings.

The first problem area is authentication. Network-based vulnerability scanners are imperfect tools at best. Even when they are properly configured, they detect only vulnerabilities for which they have signatures. While anonymous (unauthenticated) scanning can provide some benefit, failure to leverage authenticated scanning dramatically reduces scanner effectiveness.

A second key problem is the scanner's inability to work with custom applications. CVE-based, known vulnerabilities are only a small subset of most organizations' overall attack surfaces. Security checks may exist for the most popular applications and operating systems hosted within your network, but what about the custom applications you have written in-house or outsourced to third parties? There are no CVEs for custom apps.

Finally, most vulnerability scanning tools can identify points of weakness, but they can't anticipate complex attack schemes. While vulnerability scanners typically identify and report on issues that can be utilized as the initial point of entry, they are limited in identifying the complex avenues an attacker could take to compromise your network.

Automated vulnerability scanners play a critical role in helping you manage and understand the security risks that may exist within your environment. However, like any tool, the capabilities and results of these tools need to be fully understood and their limitations noted.

To get details on these key limitations, and some recommendations on how to address them, download the full report.

Have a comment on this story? Please click "Discuss" below. If you'd like to contact Dark Reading's editors directly, send us a message.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-9676
Published: 2015-02-27
The seg_write_packet function in libavformat/segment.c in ffmpeg 2.1.4 and earlier does not free the correct memory location, which allows remote attackers to cause a denial of service ("invalid memory handler") and possibly execute arbitrary code via a crafted video that triggers a use after free.

CVE-2014-9682
Published: 2015-02-27
The dns-sync module before 0.1.1 for node.js allows context-dependent attackers to execute arbitrary commands via shell metacharacters in the first argument to the resolve API function.

CVE-2015-0655
Published: 2015-02-27
Cross-site scripting (XSS) vulnerability in Unified Web Interaction Manager in Cisco Unified Web and E-Mail Interaction Manager allows remote attackers to inject arbitrary web script or HTML via vectors related to a POST request, aka Bug ID CSCus74184.

CVE-2015-0884
Published: 2015-02-27
Unquoted Windows search path vulnerability in Toshiba Bluetooth Stack for Windows before 9.10.32(T) and Service Station before 2.2.14 allows local users to gain privileges via a Trojan horse application with a name composed of an initial substring of a path that contains a space character.

CVE-2015-0885
Published: 2015-02-27
checkpw 1.02 and earlier allows remote attackers to cause a denial of service (infinite loop) via a -- (dash dash) in a username.

Dark Reading Radio
Archived Dark Reading Radio
How can security professionals better engage with their peers, both in person and online? In this Dark Reading Radio show, we will talk to leaders at some of the security industry’s professional organizations about how security pros can get more involved – with their colleagues in the same industry, with their peers in other industries, and with the IT security community as a whole.