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[rb] External Control of File Name or Path use of Kernel.open or IO.read with a non-constant value #16086

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[rb] External Control of File Name or Path use of Kernel.open or IO.read with a non-constant value #16086

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@opsysdebug opsysdebug commented Jul 24, 2025 •
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selenium/rake_tasks/crazy_fun/main.rb

Line 150 in 3744929

data = IO.read(file_name)

fix address the issue replace the usage of IO.read with File.read. This change ensures that the file-reading operation does not inadvertently execute shell commands if the file name starts with a |. The functionality remains the same, as File.read is a direct and safer alternative to IO.read.

  • Locate the line where IO.read(file_name) is used.
  • Replace IO.read(file_name) with File.read(file_name).

Command Injection. Ruby on Rails Cheat Sheet: Command Injection

PR Type

Bug fix

Description

  • Replace IO.read with File.read to prevent command injection

  • Fix security vulnerability in file reading operation

  • Ensure file names starting with | don't execute shell commands

Diagram Walkthrough

flowchart LR
  A["IO.read(file_name)"] -- "security fix" --> B["File.read(file_name)"]
  B --> C["Safe file reading"]
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File Walkthrough
Relevant files
Bug fix
main.rb
Security fix for file reading operation                                   

rake_tasks/crazy_fun/main.rb

  • Replace IO.read(file_name) with File.read(file_name) in parse_file
    method
  • Prevents command injection vulnerability when file names start with |
 +1/-1     

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CLAassistant commented Jul 24, 2025 •
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@selenium-ci selenium-ci added the B-build Includes scripting, bazel and CI integrations label Jul 24, 2025
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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪
🧪 No relevant tests
🔒 Security concerns

Command injection prevention:
This PR correctly addresses a security vulnerability by replacing IO.read with File.read. The change prevents potential command injection attacks where a malicious file name starting with | could execute shell commands. File.read is safer as it only reads files and doesn't interpret special characters as shell commands.

⚡ No major issues detected

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@opsysdebug @CLAassistant @selenium-ci