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Az - Local Cloud Credentials

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Local Token Storage and Security Considerations

Azure CLI (Command-Line Interface)

Tokens and sensitive data are stored locally by Azure CLI, raising security concerns:
  1. 1.
    Access Tokens: Stored in plaintext within accessTokens.json located at C:\Users\<username>\.Azure.
  2. 2.
    Subscription Information: azureProfile.json, in the same directory, holds subscription details.
  3. 3.
    Log Files: The ErrorRecords folder within .azure might contain logs with exposed credentials, such as:
    • Executed commands with credentials embedded.
    • URLs accessed using tokens, potentially revealing sensitive information.

Azure PowerShell

Azure PowerShell also stores tokens and sensitive data, which can be accessed locally:
  1. 1.
    Access Tokens: TokenCache.dat, located at C:\Users\<username>\.Azure, stores access tokens in plaintext.
  2. 2.
    Service Principal Secrets: These are stored unencrypted in AzureRmContext.json.
  3. 3.
    Token Saving Feature: Users have the ability to persist tokens using the Save-AzContext command, which should be used cautiously to prevent unauthorized access.

Automatic Tools to find them

Security Recommendations

Considering the storage of sensitive data in plaintext, it's crucial to secure these files and directories by:
  • Limiting access rights to these files.
  • Regularly monitoring and auditing these directories for unauthorized access or unexpected changes.
  • Employing encryption for sensitive files where possible.
  • Educating users about the risks and best practices for handling such sensitive information.
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