rastating/wordpress-exploit-framework

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lib/wpxf/modules/exploit/shell/simplecart_shell_upload.rb

Summary

Maintainability
A
25 mins
Test Coverage

Assignment Branch Condition size for run is too high. [27.35/15]
Open

  def run
    return false unless super

    emit_info 'Preparing payload...'
    payload_name = "#{Utility::Text.rand_alpha(10, :lower)}.php"

This cop checks that the ABC size of methods is not higher than the configured maximum. The ABC size is based on assignments, branches (method calls), and conditions. See http://c2.com/cgi/wiki?AbcMetric

Cyclomatic complexity for run is too high. [7/6]
Open

  def run
    return false unless super

    emit_info 'Preparing payload...'
    payload_name = "#{Utility::Text.rand_alpha(10, :lower)}.php"

This cop checks that the cyclomatic complexity of methods is not higher than the configured maximum. The cyclomatic complexity is the number of linearly independent paths through a method. The algorithm counts decision points and adds one.

An if statement (or unless or ?:) increases the complexity by one. An else branch does not, since it doesn't add a decision point. The && operator (or keyword and) can be converted to a nested if statement, and ||/or is shorthand for a sequence of ifs, so they also add one. Loops can be said to have an exit condition, so they add one.

Method run has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  def run
    return false unless super

    emit_info 'Preparing payload...'
    payload_name = "#{Utility::Text.rand_alpha(10, :lower)}.php"
Severity: Minor
Found in lib/wpxf/modules/exploit/shell/simplecart_shell_upload.rb - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Redundant return detected.
Open

    return true

This cop checks for redundant return expressions.

Example:

def test
  return something
end

def test
  one
  two
  three
  return something
end

It should be extended to handle methods whose body is if/else or a case expression with a default branch.

Avoid comma after the last parameter of a method call.
Open

    normalize_uri(plugin_url, 'admin',)

This cop checks for trailing comma in argument lists.

Example: EnforcedStyleForMultiline: consistent_comma

# bad
method(1, 2,)

# good
method(
  1, 2,
  3,
)

# good
method(
  1,
  2,
)

Example: EnforcedStyleForMultiline: comma

# bad
method(1, 2,)

# good
method(
  1,
  2,
)

Example: EnforcedStyleForMultiline: no_comma (default)

# bad
method(1, 2,)

# good
method(
  1,
  2
)

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