Vulnerability assessment & Penetration testing Basics

Vulnerability Assessment
& PenetrationTesting
(VAPT) Basics &
Methodologies
Presented by Mohammed Adam B.E (CEH)
Digital Age Strategies Pvt. Ltd. Bangalore

Outline
• Cyber attacks & Data Losses
• Why are SystemVulnerable ?
• What isVulnerability Assessment ?
• What is Penetration Testing?
• Steps Involved inVAPT Process
• Types of Testings
• VAPTTools
• Automated vs ManualVAPT
• Benefits ofVAPT Activities for an Organisation

Cyber Attacks & Data Losses
• Cyber attacks are increasing every day with the
increased use of mobile and Web applications. Globally,
statistics show that more than 70 per cent of the
applications either have vulnerabilities which could
potentially be exploited by a hacker, or worse, they have
already been exploited.
• The data losses due to this are typically of two types.
Either the data is confidential to the organisation or it is
private to an individual. Regardless of the category, data
losses result in the loss of money or reputation.

Why are systems vulnerable?
• Two main reasons for systems being vulnerable —
Misconfiguration and Incorrect programming practices.
• Misconfiguration
• In the case of network devices such as routers, switches and
servers as well as firewalls and IPS systems are either
misconfigured or in some cases not configured at all, thus
running default settings.
• As an example, almost all firewalls have a default built-in user
account with the name ‘admin’. Typically, the password for it is
also set to ‘admin’ by default, or something even easier to
guess. Looking at the example of servers, installing a database
server leaves us with an ‘sa’ account, which has a blank
password.

Why are systems vulnerable? Contd.
• Incorrect programming practices
• As for programming errors, a user input taken from a
Webapplication form may be directly sent to a backend
database server without parsing it.This can lead to a
parameter manipulation attack or SQL injection attack.
• Another example of programming errors would be a
Webservice accepting requests without performing adequate
authentication, thus leaking data inadvertently.This shows us
that it is human error that leads to vulnerable systems, which
could be exploited easily by attackers, to compromise data
confidentiality, integrity and availability.

What isVulnerability Assessment ?
• Vulnerability assessment (VA) is a systematic technical
approach to finding the security loopholes in a network
or software system.
• It primarily adopts a scanning approach which is done
both manually and performed by certain tools.
• The outcome of aVA process is a report showing all
vulnerabilities, which are categorised based on their
severity.This report is further used for the next step,
which is penetration testing (PT).

What is Penetration Testing?
• A Penetration test (PT) is a proof-of-concept approach to
actually explore and exploit vulnerabilities.
• This process confirms whether the vulnerability really
exists and further proves that exploiting it can result in
damage to the application or network.
• The outcome of a PT is, typically, evidence in the form
of a screenshot or log, which substantiates the finding
and can be a useful aid towards remediation.

Steps Involved inVAPT Process
• Reconnaissance
• Scanning the network or application
• Searching for security flaws
• Exploiting the security flaws
• Preparing the final report of the test

Types of Testings
• Penetration testing usually falls under three categories:
Black Box, Gray Box, and White Box.
• Black Box does not include any knowledge of the structure of the
system, so this type of testing simulates the approach of an outside
attacker.
• Gray Box includes only a limited knowledge of the layout of the
target.
• White Box testing occurs when a penetration tester has complete
knowledge of the layout of the target(s).

VAPT tools
• Nmap
• Acunetix
• Nessus
• OpenVAS
• Nexpose
• BurpSuite (PT)
• Metasploit (PT)

Automated vs ManualVAPT
• An ethical hacker’s job can be made less stressful by
automating certain tasks of vulnerability assessment;
however, the proof-of-concept part in penetration testing
mostly relies on manual ways of exploiting the loophole
and gathering the required evidence.
• Each network or application is different, resulting in a very
wide range of vulnerability scenarios.

Steps of an Ethical hacker performs
for aVAPT.
• Enumerates a vulnerability
• Performs an attack manually
• Analyses the results of the attack
• Performs similar or different attacks based on previous
findings
• Assimilates the results to create a customised attack
• Exploits the vulnerability further to see if more attacks are
possible
• Repeats the above steps for all vulnerabilities

Benefits of VAPT Activities for an
Organisation
• Helps identify programming errors that can lead to cyber
attacks
• Provides a methodical approach to risk management
• Secures IT networks from internal and external attacks
• Secures applications from business logic flaws
• Increased ROI on IT security
• Protects the organisation from loss of reputation and
money

Vulnerability assessment & Penetration testing Basics

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