Chapter1 : Lab 1.4.5 Identifying Network Vulnerabilities

Step 1: Open the SANS Top 20 List

Using a web browser, go to http://www.sans.org/. On the resources menu, choose top 20 list.

The SANS Top-20 Internet Security Attack Targets list is organized by category. An identifying letter

indicates the category type, and numbers separate category topics. Router and switch topics fall under the

Network Devices category, N. There are two major hyperlink topics:

N1. VoIP Servers and Phones

N2. Network and Other Devices Common Configuration Weaknesses

Step 2: Review common configuration weaknesses

a. Click hyperlink N2. Network and Other Devices Common Configuration Weaknesses.

b. List the four headings in this topic.

Deskripsi

Common Default Configuration Issues

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Step 3: Review common default configuration issues

Review the contents of N2.2 Common Default Configuration Issues. As an example, N.2.2.2 (in January

2007) contains information about threats associated with default accounts and values. A Google search on

“wireless router passwords” returns links to multiple sites that publish a list of wireless router default

administrator account names and passwords. Failure to change the default password on these devices can

lead to compromised security and vulnerability to attackers.

Step 4: Note the CVE references

The last line under several topics cites references to CVE or Common Vulnerability Exposure. The CVE name

is linked to the National Institute of Standards and Technology (NIST) National Vulnerability Database (NVD),

sponsored by the United States Department of Homeland Security (DHS) National Cyber Security Division

and US-CERT, which contains information about the vulnerability.

Step 5: Investigate a topic and associated CVE hyperlink

The remainder of this lab walks you through a vulnerability investigation and solution.

Choose a topic to investigate, and click on an associated CVE hyperlink. The link should open a new web

browser connected to http://nvd.nist.gov/ and the vulnerability summary page for the CVE.

NOTE: Because the CVE list changes, the current list may not contain the same vulnerabilities as

those in January 2007.

Step 6: Record vulnerability information

Complete the information about the vulnerability. Answers vary

Original release date:

Last revised:

Source:

Overview:

Step 7: Record the vulnerability impact

Under Impact, there are several values. The Common Vulnerability Scoring System (CVSS) severity is

displayed and contains a value between 1 and 10.

Complete the information about the vulnerability impact. Answers vary

CVSS Severity:

Access Complexity:

Authentication:

Impact Type:

Step 8: Record the solution

The References to Advisories, Solutions, and Tools section contains links with information about the

vulnerability and possible solutions.

Using the hyperlinks, write a brief description of the solution found on those pages.

Step 9: Reflection

The number of vulnerabilities to computers, networks, and data, continues to increase. Many national

governments have dedicated significant resources to coordinating and disseminating information about

security vulnerability and possible solutions. It remains the responsibility of the end user to implement the

solution. Think of ways that users can help strengthen security. Write down some user habits that create

security risks.

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