SSCP Systems and Application Security Practice Question
This SSCP practice question tests your understanding of systems and application security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are effective measures to prevent buffer overflow attacks in a custom-developed application?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Input validation
Input validation helps ensure data fits within buffer limits, and stack canaries detect and prevent stack-based buffer overflows. Using unpatched libraries increases vulnerability; disabling ASLR makes exploitation easier; running with least privilege limits damage but does not prevent the overflow itself.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Input validation
Why this is correct
Validating input length and content can prevent buffer overflows by rejecting oversized or malformed data.
Related concept
Authentication checks who the user is.
✗
Using unpatched third-party libraries
Why it's wrong here
Unpatched libraries may contain known buffer overflow vulnerabilities, increasing risk rather than preventing it.
✗
Running the application with least privilege
Why it's wrong here
Least privilege reduces the impact of a successful exploit but does not prevent buffer overflows from occurring.
✗
Disabling ASLR
Why it's wrong here
Disabling Address Space Layout Randomization makes it easier for attackers to predict memory addresses and exploit buffer overflows.
✓
Stack canaries
Why this is correct
Stack canaries are runtime guards that detect stack buffer overflows before they cause harm.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SSCP questions on access control and AAA configuration.
Systems and Application Security — This question tests Systems and Application Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Input validation — Input validation helps ensure data fits within buffer limits, and stack canaries detect and prevent stack-based buffer overflows. Using unpatched libraries increases vulnerability; disabling ASLR makes exploitation easier; running with least privilege limits damage but does not prevent the overflow itself.
What should I do if I get this SSCP question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SSCP questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.