Introduced protections against system command injection #4

pixeebot · 2024-05-02T03:45:08Z

User description

This change hardens all instances of Runtime#exec() to offer protection against attack.

Left unchecked, Runtime#exec() can execute any arbitrary system command. If an attacker can control part of the strings used to as program paths or arguments, they could execute arbitrary programs, install malware, and anything else they could do if they had a shell open on the application host.

Our change introduces a sandbox which protects the application:

+ import io.github.pixee.security.SystemCommand;
  ...
- Process p = Runtime.getRuntime().exec(command);
+ Process p = SystemCommand.runCommand(Runtime.getRuntime(), command);

The default restrictions applied are the following:

Prevent command chaining. Many exploits work by injecting command separators and causing the shell to interpret a second, malicious command. The SystemCommand#runCommand() attempts to parse the given command, and throw a SecurityException if multiple commands are present.
Prevent arguments targeting sensitive files. There is little reason for custom code to target sensitive system files like /etc/passwd, so the sandbox prevents arguments that point to these files that may be targets for exfiltration.

There are more options for sandboxing if you are interested in locking down system commands even more.

Description

Enhanced security by replacing Runtime.getRuntime().exec() with a secure alternative from java-security-toolkit to prevent system command injection vulnerabilities.
Added java-security-toolkit as a dependency in the project to facilitate the secure execution of system commands.

Changes walkthrough

Relevant files

Enhancement

App.java `Replace Runtime exec with Secure SystemCommand` page-object/sample-application/src/main/java/com/iluwatar/pageobject/App.java Replaced direct usage of `Runtime.getRuntime().exec()` with `SystemCommand.runCommand()` to prevent system command injection.	+2/-1

Configuration changes

pom.xml `Add Java Security Toolkit Dependency` page-object/pom.xml Added `java-security-toolkit` version `1.1.3` to the properties section. Included `java-security-toolkit` dependency in the dependency management section.	+10/-0

Dependencies

pom.xml `Include Security Toolkit in Sample Application` page-object/sample-application/pom.xml Added `java-security-toolkit` dependency to the `sample-application` module.	+6/-0

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pixeebot · 2024-05-02T03:45:09Z

page-object/sample-application/pom.xml

    <version>1.26.0-SNAPSHOT</version>
  </parent>
  <artifactId>sample-application</artifactId>
+  <dependencies>


This library holds security tools for protecting Java API calls.

License: MIT ✅ | Open source ✅ | More facts

pixeebot · 2024-05-02T03:45:10Z

page-object/pom.xml

        </executions>
      </plugin>
    </plugins>
  </build>


This library holds security tools for protecting Java API calls.

License: MIT ✅ | Open source ✅ | More facts

korbit-ai · 2024-05-02T03:45:13Z

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cr-gpt · 2024-05-02T03:45:13Z

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

code-genius-code-coverage · 2024-05-02T03:45:13Z

The files' contents are under analysis for test generation.

senior-dev-bot · 2024-05-02T03:45:14Z

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semanticdiff-com · 2024-05-02T03:45:14Z

Review changes with SemanticDiff.

Analyzed 1 of 3 files.

Overall, the semantic diff is 4% smaller than the GitHub diff.

	Filename	Status
❔	page-object/pom.xml	Unsupported file format
❔	page-object/sample-application/pom.xml	Unsupported file format
✔️	page-object/sample-application/src/main/java/com/iluwatar/pageobject/App.java	3.26% smaller

pr-code-reviewer · 2024-05-02T03:45:16Z

👋 Hi there!

Everything looks good!

_{^{Automatically generated with the help of gpt-3.5-turbo.

Feedback? Please don't hesitate to drop me an email at webber@takken.io.}}

codara-ai-code-review · 2024-05-02T03:45:17Z

Potential issues, bugs, and flaws that can introduce unwanted behavior:

page-object/pom.xml: Adding the <versions.java-security-toolkit>1.1.3</versions.java-security-toolkit> property without actually using it in any dependency could potentially lead to unnecessary maintenance overhead.

Code suggestions and improvements for better exception handling, logic, standardization, and consistency:

page-object/pom.xml: Consider removing the <versions.java-security-toolkit> property if it is not used in any dependency to avoid confusion and unnecessary maintenance.
page-object/sample-application/pom.xml: Since the <java-security-toolkit> dependency is added but a version is not specified, consider specifying a version to ensure a specific version is being used.
page-object/sample-application/src/main/java/com/iluwatar/pageobject/App.java: It's good to import classes from external libraries consistently. Make sure to maintain a consistent style when importing classes for clarity and readability.

coderabbitai · 2024-05-02T03:45:17Z

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instapr · 2024-05-02T03:45:21Z

Feedback

The introduction of io.github.pixee.security.SystemCommand to replace Runtime.getRuntime().exec(command) is a good security measure to prevent system command injection.
The default restrictions added to the sandbox are effective in enhancing security.
The links provided for further reading on OS Command Injection Defense and sanitizing untrusted data are valuable resources.

Overall, this change significantly improves the security of system command execution in the project. Great work! 👍

‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

codereviewbot-ai · 2024-05-02T03:45:49Z

page-object/sample-application/src/main/java/com/iluwatar/pageobject/App.java

      } else {
        // java Desktop not supported - above unlikely to work for Windows so try instead...
-        Runtime.getRuntime().exec("cmd.exe start " + applicationFile);
+        SystemCommand.runCommand(Runtime.getRuntime(), "cmd.exe start " + applicationFile);


The use of SystemCommand.runCommand with string concatenation to execute a command poses a significant security risk, particularly command injection. If applicationFile is derived from user input or an untrusted source, it could be manipulated to execute arbitrary commands.

To mitigate this risk, consider using a safer approach to execute commands that does not involve concatenation of user-controlled variables. Validate and sanitize any input that forms part of a command, or better yet, use APIs that allow specifying commands and arguments as separate entities to avoid injection vulnerabilities.

codesyncapp · 2024-05-02T03:47:31Z

Check out the playback for this Pull Request here.

nudge-bot · 2024-05-03T04:39:56Z