Security Final
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| What are the three parts of the Security Triad? | Confidentiality, Integrity, Availability
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| What are the levels of security classification? | Unclassified
Sensitive
Confidential
Secret
Top Secret
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| What are 7 security measures? | Authentication, Anti-Virus Software, DMZ
IDS/IPS, Logging, Physical Security, VPN
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| Name 3 Security Controls | 1. Administrative (Policies and Procedures Governing, Technical, end-user)
2. Physical (Mechanical)
3. Technical (Hardware and Software)
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| Formula for managing risk | Annualized Rate of Occurrence (ARO)
Single Loss Expectancy (SLE)
Asset Value (AV)
Exposure Factor (percentage Destroyed - EF)
SLE = AV x EF
ALE=SLE x ARO
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| How to evaluate risk. | 1. Threat -ÂÂ External Danger
2. Vulnerability -ÂÂ A weakness in the System
3. Exploit -ÂÂ takes advantage of vulnerability
4. Probability -ÂÂ Annualized Rate of Occurrence
5. Impact - Single Loss Expectancy
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| Risk | net impact of exploitation of vulnerability
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| Vulnerability Testing Tools | - Packet Analyzer Wireshark)
- Network Scanner
- Vulnerability Scanner (Nessus)
- Password Cracker
- Penetration Testing (Metasploit)
- Data Mining (meatgo)
- War Driving
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| Quantitative vs qualitative risk analysis | Quantitative risk analysis uses a mathematical model.
Qualitative risk analysis uses a scenario model.
Risk management uses mechanisms to reduce risk.
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| 4 ways of dealing with Risk | 1.Risk Avoidance
2. Risk Acceptance
3. Risk Transfer
4. Risk Reduction
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| 9 steps of Risk Assessment | 1. System Characterization
2. Threat Identification
3. Vulnerability Identification
4. Control Analysis
5. Likelihood Determination (ARO)
6. Impact Analysis (EF)
7. Risk Determination SLE & ALE
8. Control Recommendations
9. Results Documentation
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| Systems Development Lifecycle (SDLC) Phases | 1. Initiation
2. System Concept Development
3. Planning
4. Requirements Analysis
5. Design
6. Development
7. Integration and Test
8. Implementation
9. Operations and Maintenance
10. Disposition
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| Phase 1 - Initiation | a. Security Categorization
b. Preliminary Assessment
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| Phase 2 - Acquisition | a. Cost Considerations
b. Security Planning
c. Testing
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| Phase 3 - Implementation | a. Inspection
b. Integration
c. Certification
d. Accreditation
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| Phase 4 - Operations | a. Config mgmt and ctrl
b. Continuous monitoring
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| Phase 5 - Disposition | a. Information Preservation
b. Media Sanitization
c. Disposal
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| Principles of Operations Security | 1. Separation of Duties
a. Two Man control
b. Dual Operator
2. Rotation of Duties
3. Trusted Recovery
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| Change and Configuration Conrol | 1. Apply
2. Catalogue
3. Schedule
4. Implement
5. Report
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| Incident Handling | 1. Preparation
2. Identification
a. Event or incident
3. Containment
4. Eradication
5. Recovery
6. Documentation
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| Exploitation Steps | 1. Reconnoiter
2. Exploit
3. Escalate
4. Download
5. Backdoor
6. Leverage
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| Standard ACLs | filter source address only
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| Extended ACLs | filter destination, ports, etc.
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| Dynamic ACLs | Also known as lock and key ACL. Lock-and-key access allows you to set up dynamic access lists that grant access per user to a specific source/destination host through a user authentication process.
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| Time-based ACLs | activate at specific times
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| Reflexive ACLs | Reflexive access lists provide the ability to filter network traffic at a router, based on IP upper-layer protocol "session" information.
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| What are firewalls? | Software or hardware set up in such a fashion so as to allow or prevent network communication over various ports or protocols.
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| What is an IDS | An Intrusion Detection System. It can log malicious packets, but cannot take immediate action.
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| What is an IPS | An Intrusion Protection system. It can identify malicious packets and can take immediate action
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| What is a True Positive | It is when your firewall blocks and logs a malicious event as such. It worked as intended.
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| What is a False Positive | It is when your firewall logs an even as potentially harmful and blocks it, even though it is not. It is a waste of resources
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| What is a True Negative | It's when your firewall logs an actual harmless event as harmless and allows it. Nothing to see here
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| What is a False negative | Worst case scenario, it's when your firewall logs something as safe and allows it, but it is really malicious.
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| What is a Honeypot | a decoy system (IPS)
Lures and traps hackers
Can distract and confuse attackers
Can log attacks in detail
Can collect data on attackers
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| What are Proxies | (IPS)
Forward – pass internal requests out
Open – pass requests anywhere
Reverse – pass requests from Internet
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| What is Cryptography | study of code and ciphers
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| What is Cryptoanalysis | how to break codes and ciphers
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| What is Sigint | Intelligence from interception of signals
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| What is Comint | Communications Intelligence
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| What is Elint | Electronics Intelligence
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| What is DES? | Data Encryption Standard
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| What is AES? | Advanced Encryption Standard
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| What are the goals of Encryption? | 1. Confidentiality
2. Data Integrity
3. Authentication
4. Non-Repudiation
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| What is a Cipher | Encrypts and decrypts
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| What is Encryption | convert plain text to ciphertext
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| What is Decryption | Convert ciphertext to plain text
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| What is Symmetric Encryption | Same key is used to encrypt and decrypt msg
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| What is Asymmetric Encryption | Receiver has private key, receives public key from sender.
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| What are the characteristics of DES | Symmetric
64-bit block
56-bit key strength
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| How does Triple-DES work | 1. Sender Encrypts Key A
2. Sender Decrypts key B
3. Sender Encrypts Key C
4. Cipher text
5. Receiver Decrypts Key C
6. Receiver Encrypts Key B
7. Receiver Encrypts Key A
8. Plain Text
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| What are three common Encryption Methods | 1. Rotation
2. Substitution
3. Permutation
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| What are 4 DES Modes | 1. ECB (Electronic Code Book)
2. Cipher Block Chaining (CBC)
3. Cipher Feedback (CFB)
4. Output Feedback (OFB)
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| What is RSA? | It's one of the first public key cryptosystems. Its names is based on its three inventors - Rivest, Shamir, Adleman
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| What is Steganography | Steganography conceals data in a carrier medium
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| What is Null Cipher | A method of steganography where a message hidden in the body
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| What is Injection | A method of steganography where data is hidden in unused part of file
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| What is Substitution | A method of steganography where non-critical data is replaced
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| What are 4 Means of Authentication | 1. Something you know
2. Something you have
3. Something you are
4. Something you do
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| What are some means of exploiting Password Vulnerability | 1. Offline Dictionary attack
2. Specific Account attack
3. Popular password attack
4. Password guessing
5. Workstation hijacking
6. Exploiting user mistakes
7. Exploiting multiple password use
8. Electronic monitoring
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| What are four password protection techniques | 1. User education
2. Computer generated passwords
3. Reactive password checking
4. Proactive password checking
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| What are two examples of Token-based authentication | 1. Memory cards
2. Smart Cards
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| Principles of access control | 1. Authentication
2. Authorization
3. Audit
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| Policies for access control | 1. Discretionary Access Control (DAC)
2. Mandatory Access Control (MAC)
3. Role-based Access Control (RBAC)
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| What is Discretionary Access Control (DAC) | Controls access based on the identity of the requestor and on access rules. Discretionary because one person can set permissions.
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| What is Mandatory Access Control (MAC) | Controls access based on comparing security labels with security clearances.
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| What is Role-based Access Control (RBAC) | Controls access based on roles that users have within the system and on rules stating what accesses are allowed users in given rules.
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| Which iptables rule would generate a destination unreachable error? | iptables –A FORWARD –s 0/0 –d 0/0 –j REJECT
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| Standards for protocols and associated information are first published in? | RFCs
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| ICMP protocol is specifically designed to do what? | Check & report on network error conditions
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| What is an example of egress filtering? | Only allowing traffic to leave you network with a source IP in your company's IP range
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| Which vulnerability is considered the hardest to harden against? | The human element
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| In security environments, Authorization means | Using your identity to assign access rights
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| It is possible to capture packets from the network that are not destined for your machine. | True
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| During a packet capture, you notice a couple of TCP packets with the “F” flag and some “A” flags. What is likely going on? | A TCP/IP session shutdown process
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| Which of the following devices are likely to be found at the network perimeter? | "Firewall"
"Border Router"
"Remote Access Gateway"
VLAN Switch
Protected Web Servers
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| TCP has ___ states | 11
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| Based on the packet capture code below, what network protocol is being used? 4500 0064 0000 4000 40"01" b755 c0a8 0101 | ICMP
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| The loss or omission of one of the goals of security is known as: | A compromise
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| Which of the following tools will help you determine which services are running on a port? | Ping
Nmap
"Nessus"
Traceroute
Nslookup
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| A stateful inspection firewall creates a ___ to track history for each communication. | State Table
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| Which one of the following software tools are not considered to be a packet sniffer? | "Ping"
Snort
"Nmap"
Ethereal
Tcpdump
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| An ___ is to detection what an ___ is to protection. | IDS, IPS
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| Which of the following statements about packet filtering routers is FALSE? | Can examine ports
Can examine flags
"Can examine protocol commands"
Can examine addresses
None of the above answers are true
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| Packet sniffing is a form of | Passive reconnaissance
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| ___ is a mechanism to verify identity prior to allowing access to protected resources. | Access control
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| Computer A wishes to open a TCP session with Computer B. If Computer A's initial sequence number is 145678913, then Computer B will respond with: | An initial sequence number of its own and an acknowledgement number of 145678914
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| The Data ____ is the person having responsibility and authority for data, while the Data ___ is the entity temporarily accessing and/or modifying the data. | Owner, Custodian
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| Passwords are considered to be the most common security weakness. | True
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| When referring to firewalls, the word chains means: | A set of rules created for a specific type/direction of traffic
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| A proxy server is responsible for: | Making information requests to the outside world as if it was you doing it
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| The DoD Trusted Computer Evaluation Criteria is also known as: | The Orange Book
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| A ___ attack does not involve the end-user in the attack, while in a ___ attack there is an actual active victim to the attack. | Spoofing, Hijacking
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| Based on the packet capture code below, what protocol is being used? "45"00 0064 0000 4000 4001 b755 c0a8 0101 | TCP
ICMP
UDP
ARP
"None of the above"
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| Which of the following is not an Access Control mechanism? | Photo ID
Biometrics
RFID
Passwords
"They are all Access Control mechanisms"
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| When talking about O/S passwords, a “salt” refers to: | The random bits used as part of the input for encrypting the password
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| A ___ outlines specific requirements or rules that must be met. | Policy
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| Each TCP connection is uniquely identified by: | A. Source and Destination IP
B. Source and Destination Port
C. Sequence Number
D. Connection Number
"A & B only"
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| Which of the following is not an Access Control Protocol? | CHAP
SSL
PAP
"TCP"
802.11x
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| This tool is considered to be a port sniffer/mapper, but not a vulnerability scanner. | NMap
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| Which of the following is not one of the Security Goals? | Security
"Accountability"
Ease of Use
Functionality
They are all Security Goals
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| Stateful Inspection Firewalls can examine all layer 4 information in the packet and application level commands. | False
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| Scanning network traffic using a sniffer is not considered an infraction in Canadian Law. | False
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| In the CIA Triad, ____ is responsible for ensuring that legitimate users maintain access to information and resources they need access to. | Availability
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| Which one of the following is NOT a fundamental principle of the Computer Security Triad? | Confidentiality
Integrity
Availability
"Disclosure"
Accountability
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| Decoding captured packets | DESTINATION MAC (6 bytes), SOURCE MAC (6 bytes)
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