The answer is to update the base image to a patched version. This is the correct remediation because the vulnerability resides in the underlying image layers, and only a patched version from a trusted registry eliminates the flaw at its source. Rebuilding the container with the same base image simply reintroduces the same high-severity vulnerability, while overriding the security gate or adding exceptions undermines the entire purpose of CI/CD pipeline vulnerability remediation. On the CompTIA SecurityX CAS-004 exam, this scenario tests your understanding of immutable infrastructure and secure software supply chain practices—a common trap is choosing to “override the gate” under time pressure, which violates policy and fails the security control. Remember the memory tip: “Patch the base, not the pace”—fix the image itself rather than bypassing the pipeline’s security checks.
CAS-004 Scripting, Containers and Automation Practice Question
This CAS-004 practice question tests your understanding of scripting, containers and automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
In a CI/CD pipeline, a security gate fails because a high-severity vulnerability is found in the base image of a container. The pipeline is configured to block deployment on such findings. What is the appropriate remediation step?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the base image to a patched version
Updating the base image to a patched version ensures the vulnerability is fixed. Overriding the gate or adding exceptions bypasses security, and rebuilding with the same base retains the issue.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Update the base image to a patched version
Why this is correct
Using a patched base image resolves the vulnerability.
Related concept
Static NAT maps one inside address to one outside address.
✗
Override the security gate and proceed with deployment
Why it's wrong here
Overriding ignores the vulnerability, compromising security.
✗
Rebuild the image using the same base image
Why it's wrong here
Rebuilding with the same vulnerable base does not fix the issue.
✗
Add the vulnerability to an exception list
Why it's wrong here
Exception lists bypass security without fixing the root cause.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CAS-004 NAT questions on configuration and troubleshooting.
Scripting, Containers and Automation — This question tests Scripting, Containers and Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Update the base image to a patched version — Updating the base image to a patched version ensures the vulnerability is fixed. Overriding the gate or adding exceptions bypasses security, and rebuilding with the same base retains the issue.
What should I do if I get this CAS-004 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CAS-004 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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