Fix dns resolver for docker

[sailikhith-stepsecurity]

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[step-security-bot]

Please find StepSecurity AI-CodeWise code comments below.

Code Comments

dnsconfig.go

• [High]Avoid using hard-coded IP addresses in code
  The code is using hard-coded IP addresses 127.0.0.1 and 172.17.0.1. Hard-coded IP addresses may change, which can result in service disruption or security breaches. Use configurable parameters instead of hard-coded IP addresses to avoid service disruption or security breaches.
• [High]Avoid exposing sensitive configuration files
  The function 'updateDockerConfig' is updating the Docker configuration file, which may contain sensitive information such as login credentials. Exposing these files may result in security breaches. Avoid exposing sensitive configuration files by storing them in a secured directory, removing sensitive information such as login credentials, and restricting access to authorized users.
• [Medium]Avoid commenting out code in source files
  Code commented out can accumulate over time, cluttering the code and making it harder to maintain. Furthermore, commented-out code can make it hard to understand the code. Remove commented-out code from source files.
• [Medium]Check error returned by 'ioutil.ReadFile'
  The function 'ioutil.ReadFile' may return an error that should be checked to handle any potential error. Check the error returned by 'ioutil.ReadFile' and handle any potential error.
• [Low]Avoid using non-descriptive variable names
  Variable names such as 'm' or 'configPath' are not descriptive, making the code harder to understand and maintain. Use descriptive variable names to make the code clearer and easier to understand.

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[step-security-bot]

Please find StepSecurity AI-CodeWise code comments below.

Code Comments

dnsconfig.go

• [High]Do not use a hard-coded DNS address in the code or configuration files
  The current code uses a hard-coded IP address (127.0.0.1) for DNS in both the Docker configuration and the systemd-resolved service configuration. This may cause issues if the IP address changes or if the service is moved to a different machine. Use a more robust method for specifying the DNS addresses, like reading them from a configuration file or an environment variable.
• [High]Uncomment code with caution
  The code removes a configuration setting by commenting it out. Commenting out code should be avoided because it can make the code harder to read. It should only be used as a temporary measure while debugging or testing. Delete the commented-out code instead of leaving it in the file.
• [Medium]Do not use a hard-coded IP address in the code or configuration files
  The code uses a hard-coded IP address (172.17.0.1) for DNS in the Docker configuration. This may cause issues if the IP address changes or if the service is moved to a different machine. Use a more robust method for specifying the DNS addresses, like reading them from a configuration file or an environment variable.
• [Low]Check if a package is required before installing it
  The code installs the 'git' package without checking if it is already installed. This can lead to unnecessary re-installations and can slow down the installation process. Check if the package is installed first using the appropriate package manager command. For example, if using apt-get: sudo apt-get list --installed | grep git

dnsconfig_test.go

• [High]Remove sensitive data from version control system
  A Docker config file is being read with sensitive information such as DNS, which should never be kept in version control as it can be accessed by unauthorized personnel. Instead of storing sensitive information in the config file, use environment variables or a secured secrets store to retrieve them. Specifically, in this code block, the sensitive information needs to be removed from the files tmpFileName and mockDockerConfigPath, and they should only contain non-sensitive configuration information.
• [High]Do not expose sensitive information in test output messages
  This test is logging out the Docker config file, which could contain sensitive information such as DNS server information or other connection details. Refactor the test to not output sensitive information. Specifically, remove logging the config file's content and only log if the file exists or not.
• [Medium]Reduce cyclomatic complexity of function
  The function updateDockerConfig has a high cyclomatic complexity, making it harder to understand the program flow and find bugs or security vulnerabilities. Consider refactoring the function to reduce its complexity and improve readability. Specifically, separate the code block inside the first if err != nil block into its own function, which will handle the creation of the new config. This function can be called twice (once for the existing file path and once for the non-existent one), removing the need for the switch-case block. Additionally, if possible, remove the panic statement by handling the error and returning an error value.
• [Medium]Avoid logging sensitive information
  The writeResolveConfig test is logging a DNS entry, which can contain sensitive information. In the test, remove the log statement that prints out the DNS entry. If a log message is needed, ensure that it does not contain any sensitive information.
• [Low]Avoid magic numbers in the code
  A magic number is a number that appears in the code without any context or explanation. In this code block, the IP address 172.17.0.1 appears twice. Declare the IP address 172.17.0.1 as a variable at the beginning of the file and use that variable instead of using the IP address directly. This ensures that if the IP address changes, it only needs to be updated in a single place.

Feedback

We appreciate your feedback in helping us improve the service! To provide feedback, please use emojis on this comment. If you find the comments helpful, give them a 👍. If they aren't useful, kindly express that with a 👎. If you have questions or detailed feedback, please create n GitHub issue in StepSecurity/AI-CodeWise.

[step-security-bot]

Please find StepSecurity AI-CodeWise code comments below.

Code Comments

agent.go

• [High]Proper Logging mechanism
  The existing logging mechanism is not adequate to handle more complex use-cases. It is always recommended to use a well-known logging framework like Logrus or Zap to have a better logging implementation. Use a well-known logging framework like Logrus or Zap to have a better logging implementation.
• [High]Use constant for Audit and Block Policy
  The Audit and Block policy should use constants rather than string literals to maintain uniformity and clarity. Define constant for policy EgressPolicyAudit and EgressPolicyBlock, respectively, rather than using string literals.
• [Medium]Use Logger instead of WriteLog
  The WriteLog function is not an appropriate way to implement logging. Document Log should be used instead. Use log package instead of WriteLog.
• [Medium]Rename variable err to a more relevant name
  Variable name should be meaningful and give a sense of what it holds. In this case, err variable name is not meaningful when reading the code. It is recommended to use a relevant and meaningful name. Rename err to a more relevant name like dnsResolutionError.
• [Low]Refactor the Rewrite function
  The Rewrite function is highly dependent on the original source code, and it needs to be refactored and simplified. Rewrite the function with simpler and more efficient code.

dnsconfig.go

• [High]Avoid using hard-coded IP addresses and DNS server names
  Using hard-coded IP addresses and DNS server names can cause the system to break if any of those parameters change. Instead, use a domain name system that can be easily updated. Use a domain name system and environment variables to set the IP address of the local DNS server and update the Docker configuration file accordingly.
• [Medium]Avoid using deprecated options
  Removing deprecated Docker options is important to keep your system running smoothly and to minimize vulnerabilities. In this case, the 'dns' option is deprecated and should be removed from the Docker configuration file. Remove the 'dns' option from the Docker configuration file.

dnsconfig_test.go

• [High]Do not include potentially sensitive configuration files in version control systems. Store them separately as secrets or environment variables
  The Docker configuration file is being committed to the Git repository with sensitive information, such as IP addresses and server names. Remove the Docker configuration file from version control and store it as secrets or environment variables.
• [Medium]Remove unused code
  The DNS parameter is not used in the Docker configuration file. Remove the DNS parameter from the Docker configuration file.
• [Low]Avoid unnecessary dependencies
  The Go testing package is imported but not used in the code. Remove the import statement for the Go testing package.

Feedback

We appreciate your feedback in helping us improve the service! To provide feedback, please use emojis on this comment. If you find the comments helpful, give them a 👍. If they aren't useful, kindly express that with a 👎. If you have questions or detailed feedback, please create n GitHub issue in StepSecurity/AI-CodeWise.