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    Apex

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    Elixir

    • Overview
    • Insecure Configuration
    • Insecure File Management
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    • Insecure Use of Dangerous Function
    • Insecure Use of Language/Framework API
    • Insecure Use of SQL Queries
    • Using Vulnerable Libraries

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    • Using Vulnerable Libraries

    Java

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    Javascript/TypeScript

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    • Using Vulnerable Libraries

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    PHP

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    • Insecure Use of SQL Queries
    • Using Vulnerable Libraries

    Python

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    • Insecure Configuration
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    • Using Vulnerable Libraries

    Ruby

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    • Using Vulnerable Libraries

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Insecure Use of Language/Framework API

Why is this important?

Elixir, like any other programming language, has powerful or security related APIs. If these APIs are not used properly, it can have a catastrophic impact on your app.

Insecure Use of binary_to_term

If user input is passed to Erlang's binary_to_term function it may result in memory exhaustion or code execution. Even with the :safe option, binary_to_term will deserialize functions, and shouldn't be considered safe to use with untrusted input.

Fixing Insecure Use of binary_to_term

Option A: Avoid user input in binary_to_term

  1. Go through the issues that GuardRails identified in the PR.
  2. Identify the following patterns:
def index(conn, %{"test" => test}) do
  :erlang.binary_to_term(test)
end
  1. Where possible, avoid the function entirely, or only allow certain allowed user-input.
def index(conn, %{"test" => test}) do
  :erlang.binary_to_term(test, [safe])
end
  1. Test it and ensure the functionality works as expected
  2. Ship it 🚢 and relax 🌴

More information

  • binary_to_term(1)
  • binary_to_term(2)
  • How to destroy your application using :erlang.binary_to_term/1
← Insecure Use of Dangerous FunctionInsecure Use of SQL Queries →
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  • Insecure Use of binary_to_term
    • Fixing Insecure Use of binary_to_term
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