Hadolint files #18
Hadolint files #18
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📝 WalkthroughWalkthroughA new Dockerfile is introduced to build a containerized Python 3 environment. It uses Ubuntu as the base image, installs Python 3 and pip, copies application files into the container at Changes
Poem
Impact AnalysisIntroduction of a Docker container for running app.py with open permissions📢 Medium 🔄 Impacts behavior 🔒Impacts security A new Dockerfile allows users to build and run the application in a Python 3 environment using Docker, making deployment and environment setup more consistent and portable. However, the /app directory is set to world-writable (permissions 777), which may introduce security risks by allowing any process in the container to modify application files. Test building and running the Docker image to verify that app.py executes as expected. Check file permissions and attempt to modify files in /app from within the container to confirm security implications. 🔍 Related Files
✨ Finishing Touches🧪 Generate unit tests
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Actionable comments posted: 4
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
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📒 Files selected for processing (1)
hadolint/Dockerfile(1 hunks)
🧰 Additional context used
🪛 Hadolint (2.12.0)
hadolint/Dockerfile
[error] 2-2: MAINTAINER is deprecated
(DL4000)
| @@ -0,0 +1,8 @@ | |||
| FROM ubuntu | |||
| MAINTAINER someone@example.com | |||
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🛠️ Refactor suggestion
Replace deprecated MAINTAINER with LABEL
MAINTAINER is obsolete (DL4000) and triggers Hadolint errors. Switch to a LABEL for forward-compatibility.
-MAINTAINER someone@example.com
+LABEL maintainer="someone@example.com"📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| MAINTAINER someone@example.com | |
| # hadolint/Dockerfile | |
| # … other instructions … | |
| LABEL maintainer="someone@example.com" | |
| # … remaining instructions … |
🧰 Tools
🪛 Hadolint (2.12.0)
[error] 2-2: MAINTAINER is deprecated
(DL4000)
🤖 Prompt for AI Agents
In hadolint/Dockerfile at line 2, replace the deprecated MAINTAINER instruction
with a LABEL instruction. Change the line from "MAINTAINER someone@example.com"
to "LABEL maintainer=\"someone@example.com\"" to comply with current Dockerfile
best practices and avoid Hadolint errors.
| @@ -0,0 +1,8 @@ | |||
| FROM ubuntu | |||
| MAINTAINER someone@example.com | |||
| RUN apt-get update && apt-get install -y python3 pip | |||
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Build will fail: pip package name is wrong and cache isn’t cleaned
- The Debian/Ubuntu package is
python3-pip, notpip; the current command exits withE: Unable to locate package pip. - Omitting
apt-get clean/ removing apt lists bloats the image.
Proposed fix:
-RUN apt-get update && apt-get install -y python3 pip
+RUN apt-get update && \
+ apt-get install -y --no-install-recommends python3 python3-pip && \
+ rm -rf /var/lib/apt/lists/*🤖 Prompt for AI Agents
In hadolint/Dockerfile at line 3, the package name 'pip' is incorrect and should
be replaced with 'python3-pip' to avoid installation failure. Additionally,
after installing packages, run 'apt-get clean' and remove '/var/lib/apt/lists/*'
to reduce image size by cleaning the apt cache. Update the RUN command to
install 'python3-pip' and include cache cleaning steps.
| @@ -0,0 +1,8 @@ | |||
| FROM ubuntu | |||
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💡 Verification agent
❓ Verification inconclusive
Pin the base image for reproducible builds
ubuntu without a tag drifts over time and may break in CI/CD. Pin a specific LTS tag (e.g. ubuntu:22.04) or a digest.
-FROM ubuntu
+FROM ubuntu:22.04Pin the base image for reproducible builds
Using an untagged base image drifts over time and can break your CI/CD. Pin the Ubuntu LTS release in hadolint/Dockerfile:
• hadolint/Dockerfile:1
-FROM ubuntu
+FROM ubuntu:22.04📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| FROM ubuntu | |
| FROM ubuntu:22.04 |
🤖 Prompt for AI Agents
In hadolint/Dockerfile at line 1, the base image is specified as "ubuntu"
without a tag, which can lead to non-reproducible builds. Update the FROM
instruction to pin the base image to a specific Ubuntu LTS release tag, such as
"ubuntu:22.04", to ensure consistent and reproducible builds over time.
| RUN apt-get update && apt-get install -y python3 pip | ||
| COPY . /app | ||
| WORKDIR /app | ||
| RUN chmod 777 /app |
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🛠️ Refactor suggestion
chmod 777 opens the entire app directory to everyone
World-writable permissions are unnecessary and risky. Prefer a dedicated non-root user with narrow permissions.
-RUN chmod 777 /app
+# optional: create non-root user and adjust perms
+RUN useradd -ms /bin/bash appuser && \
+ chown -R appuser:appuser /app
+USER appuser🤖 Prompt for AI Agents
In hadolint/Dockerfile at line 6, replace the insecure 'chmod 777 /app' command
with setting ownership of /app to a dedicated non-root user and assign more
restrictive permissions, such as 755 or 750, to limit access. Create and switch
to this non-root user in the Dockerfile before running the application to
enhance security.
Summary by CodeRabbit