28 lines
900 B
Plaintext
28 lines
900 B
Plaintext
==== Neutralize special characters
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If the application is to execute complex commands that cannot be controlled
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thanks to pre-approved lists, the cleanest approach is to use special
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sanitization components, such as `{sanitizationLib}`.
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The library helps you to get rid of common dangerous characters, such as:
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* `&`
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* `|`
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* `;`
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* `$`
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* `>`
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* `<`
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* `\``
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* `\\`
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* `!`
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If user input is to be included in the arguments of a command, the application
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must ensure that dangerous options or argument delimiters are neutralized. +
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Argument delimiters count `'`, `-` and spaces.
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For example, the `find` command from UNIX supports the dangerous argument
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`-exec`. +
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In this case, option processing can be terminated with a string containing `--`
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or with special options. For example, `git` supports
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`--end-of-options` https://github.blog/2019-11-03-highlights-from-git-2-24/#tidbits[since its version 2.24].
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