2.4 Given a scenario, recommend controls to mitigate attacks and software vulnerabilities.

📘CompTIA CySA+ (CS0-003)

1. What Are Identification and Authentication Failures?

Identification = Claiming who you are

Example: entering a username like admin

Authentication = Proving who you are

Example: entering a password, fingerprint, or code

👉 A failure happens when:

The system does not properly verify identity
Weak or broken authentication allows attackers to gain access

2. Why This Is Important for the Exam

This topic is part of security vulnerabilities and is closely related to:

Unauthorized access
Privilege escalation
Data breaches

👉 In exam scenarios, you must:

Recognize weak authentication systems
Recommend proper controls to fix them

3. Common Types of Identification and Authentication Failures

3.1 Weak Passwords

Problem:

Users choose simple passwords like:
- 123456
- password
- admin

Risk:

Easily guessed using brute force or dictionary attacks

Control:

Enforce strong password policies:
- Minimum length (e.g., 12+ characters)
- Mix of uppercase, lowercase, numbers, symbols
- Avoid common passwords

3.2 Default Credentials

Problem:

Systems use default usernames/passwords:
- admin/admin
- root/password

Risk:

Attackers already know these credentials

Control:

Change default credentials immediately
Disable unused default accounts

3.3 Lack of Multi-Factor Authentication (MFA)

Problem:

Only password is used

Risk:

If password is stolen, attacker gains full access

Control:

Implement Multi-Factor Authentication (MFA)

Types of factors:

Something you know → Password
Something you have → Token, mobile app
Something you are → Biometrics

3.4 Poor Session Management

Problem:

Sessions do not expire
Tokens are reused or predictable

Risk:

Session hijacking

Control:

Set session timeout
Use secure session tokens
Regenerate session IDs after login

3.5 Credential Stuffing

Problem:

Attackers reuse stolen usernames/passwords from other systems

Risk:

Users reuse passwords across systems

Control:

Enforce unique passwords
Use MFA
Monitor login attempts

3.6 Brute Force Attacks

Problem:

Attackers try many password combinations

Risk:

Weak passwords get cracked

Control:

Account lockout after failed attempts
Rate limiting
CAPTCHA

3.7 Improper Access Controls

Problem:

Users can access systems without proper verification

Risk:

Unauthorized access

Control:

Use Role-Based Access Control (RBAC)
Apply least privilege principle

3.8 Insecure Credential Storage

Problem:

Passwords stored in plain text

Risk:

If database is compromised, all passwords exposed

Control:

Store passwords using:
- Hashing
- Salting
- Secure algorithms (e.g., bcrypt)

3.9 Broken Authentication Logic

Problem:

Flaws in login system:
- Skipping authentication steps
- Accepting invalid tokens

Risk:

Attackers bypass login

Control:

Proper authentication flow validation
Secure coding practices
Regular testing

3.10 Lack of Account Monitoring

Problem:

Suspicious login attempts not detected

Risk:

Attacks go unnoticed

Control:

Enable logging and monitoring:
- Failed login attempts
- Unusual login locations
Use SIEM tools

4. Key Security Controls to Mitigate These Failures

4.1 Strong Authentication Mechanisms

Use MFA everywhere possible
Use secure authentication protocols

4.2 Password Policies

Enforce complexity and length
Prevent reuse of old passwords
Expire passwords when needed

4.3 Account Lockout Policies

Lock account after multiple failed attempts
Temporary lockouts reduce brute force attacks

4.4 Secure Credential Storage

Hash and salt passwords
Never store plain-text passwords

4.5 Identity and Access Management (IAM)

Centralized authentication system
Control user roles and permissions

4.6 Monitoring and Logging

Track login activity
Detect anomalies

4.7 Session Security

Use HTTPS only
Secure cookies
Timeout inactive sessions

4.8 Regular Security Audits

Test authentication systems
Identify weaknesses early

5. Signs of Identification and Authentication Failures (Exam Clues)

Watch for phrases like:

“Users can log in without password”
“Default credentials still enabled”
“No MFA configured”
“Multiple failed login attempts”
“Password stored in plain text”
“Users accessing unauthorized resources”

👉 These indicate authentication weaknesses.

6. Best Practices (Exam Summary)

Always use MFA
Enforce strong passwords
Disable default accounts
Use least privilege
Monitor login activity
Secure session handling
Store credentials securely

7. Quick Exam Revision Table

Issue	Risk	Control
Weak passwords	Easy to guess	Strong password policy
Default credentials	Known to attackers	Change defaults
No MFA	Account takeover	Enable MFA
Brute force	Password cracking	Lockout policies
Credential reuse	Unauthorized access	Unique passwords
Plain-text passwords	Data breach	Hash + salt
Poor session control	Session hijacking	Timeout + secure tokens

Final Exam Tip

👉 If the question involves:

Login issues
Unauthorized access
Weak password systems

➡️ The answer is usually:

Implement MFA
Strengthen authentication controls
Secure credential handling