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modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb

Summary

Maintainability
C
1 day
Test Coverage

Method initialize has 79 lines of code (exceeds 25 allowed). Consider refactoring.
Open

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Linux BPF Sign Extension Local Privilege Escalation',
Severity: Major
Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 3 hrs to fix

    Method check has 32 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      def check
    arch = kernel_hardware

    unless arch.include?('x86_64')
      return CheckCode::Safe("System architecture #{arch} is not supported")
    Severity: Minor
    Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 1 hr to fix

      Method check has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
      Open

        def check
    arch = kernel_hardware

    unless arch.include?('x86_64')
      return CheckCode::Safe("System architecture #{arch} is not supported")
      Severity: Minor
      Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 1 hr 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

      Avoid too many return statements within this method.
      Open

            return CheckCode::Detected('Could not retrieve kernel config')
      Severity: Major
      Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 30 mins to fix

        Avoid too many return statements within this method.
        Open

              return CheckCode::Safe('grsecurity is in use')
        Severity: Major
        Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 30 mins to fix

          Avoid too many return statements within this method.
          Open

                return CheckCode::Safe('Kernel config does not include CONFIG_BPF_SYSCALL')
          Severity: Major
          Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb - About 30 mins to fix

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

              def exploit
    if !datastore['ForceExploit'] && is_root?
      fail_with(Failure::BadConfig, 'Session already has root privileges. Set ForceExploit to override.')
    end
            Severity: Minor
            Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.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

            Similar blocks of code found in 2 locations. Consider refactoring.
            Open

                        [ 'BID', '102288' ],
            [ 'CVE', '2017-16995' ],
            [ 'EDB', '44298' ],
            [ 'EDB', '45010' ],
            [ 'URL', 'https://github.com/rlarabee/exploits/blob/master/cve-2017-16995/cve-2017-16995.c' ],
            Severity: Minor
            Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb and 1 other location - About 55 mins to fix
            modules/exploits/windows/smb/smb_rras_erraticgopher.rb on lines 44..58

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 46.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

            Identical blocks of code found in 2 locations. Consider refactoring.
            Open

                if Rex::Version.new(release.split('-').first) > Rex::Version.new('4.14.11') ||
       Rex::Version.new(release.split('-').first) < Rex::Version.new('4.0')
      return CheckCode::Safe("Kernel version #{release} is not vulnerable")
    end
            Severity: Minor
            Found in modules/exploits/linux/local/bpf_sign_extension_priv_esc.rb and 1 other location - About 30 mins to fix
            modules/exploits/example_linux_priv_esc.rb on lines 101..104

            Duplicated Code

            Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

            Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

            When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

            Tuning

            This issue has a mass of 33.

            We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

            The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

            If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

            See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

            Refactorings

            Further Reading

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