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modules/exploits/linux/misc/cisco_ios_xe_rce.rb

Summary

Maintainability
C
7 hrs
Test Coverage

Method initialize has 84 lines of code (exceeds 25 allowed). Consider refactoring.
Open

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Cisco IOX XE Unauthenticated RCE Chain',
Severity: Major
Found in modules/exploits/linux/misc/cisco_ios_xe_rce.rb - About 3 hrs to fix

    Method exploit has a Cognitive Complexity of 13 (exceeds 5 allowed). Consider refactoring.
    Open

      def exploit
    admin_username = rand_text_alpha(8)
    admin_password = rand_text_alpha(8)

    # Leverage CVE-2023-20198 to run an arbitrary CLI command and create a new admin user account.
    Severity: Minor
    Found in modules/exploits/linux/misc/cisco_ios_xe_rce.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

    Method exploit has 33 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      def exploit
    admin_username = rand_text_alpha(8)
    admin_password = rand_text_alpha(8)

    # Leverage CVE-2023-20198 to run an arbitrary CLI command and create a new admin user account.
    Severity: Minor
    Found in modules/exploits/linux/misc/cisco_ios_xe_rce.rb - About 1 hr to fix

      Method check has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
      Open

        def check
    # First, a get request to the root of the Web UI, this lets us verify the target is a Cisco IOS XE device with
    # the Web UI exposed (which is the vulnerable component).
    res = send_request_cgi(
      'method' => 'GET',
      Severity: Minor
      Found in modules/exploits/linux/misc/cisco_ios_xe_rce.rb - About 35 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 22 locations. Consider refactoring.
      Open

                ['CVE', '2023-20198'],
          ['CVE', '2023-20273'],
          # Vendor advisories.
          ['URL', 'https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z'],
          ['URL', 'https://blog.talosintelligence.com/active-exploitation-of-cisco-ios-xe-software/'],
      Severity: Major
      Found in modules/exploits/linux/misc/cisco_ios_xe_rce.rb and 21 other locations - About 20 mins to fix
      modules/auxiliary/dos/http/hashcollision_dos.rb on lines 36..44
      modules/auxiliary/scanner/http/wp_woocommerce_payments_add_user.rb on lines 61..69
      modules/exploits/android/browser/webview_addjavascriptinterface.rb on lines 58..66
      modules/exploits/freebsd/local/rtld_execl_priv_esc.rb on lines 57..65
      modules/exploits/linux/http/apache_superset_cookie_sig_rce.rb on lines 32..40
      modules/exploits/linux/http/zimbra_cpio_cve_2022_41352.rb on lines 44..52
      modules/exploits/linux/local/bpf_priv_esc.rb on lines 48..56
      modules/exploits/linux/local/cve_2021_3490_ebpf_alu32_bounds_check_lpe.rb on lines 53..61
      modules/exploits/linux/local/glibc_realpath_priv_esc.rb on lines 48..56
      modules/exploits/linux/local/systemtap_modprobe_options_priv_esc.rb on lines 43..51
      modules/exploits/linux/misc/lprng_format_string.rb on lines 26..34
      modules/exploits/linux/upnp/dlink_upnp_msearch_exec.rb on lines 70..78
      modules/exploits/multi/browser/java_jre17_exec.rb on lines 43..51
      modules/exploits/multi/http/git_client_command_exec.rb on lines 47..55
      modules/exploits/multi/http/vtiger_soap_upload.rb on lines 33..41
      modules/exploits/windows/browser/ms13_022_silverlight_script_object.rb on lines 40..48
      modules/exploits/windows/browser/webex_ucf_newobject.rb on lines 40..48
      modules/exploits/windows/fileformat/allplayer_m3u_bof.rb on lines 31..39
      modules/exploits/windows/http/exchange_chainedserializationbinder_rce.rb on lines 45..54
      modules/exploits/windows/http/exchange_ecp_dlp_policy.rb on lines 49..57
      modules/exploits/windows/http/netgear_nms_rce.rb on lines 32..40

      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 28.

      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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