Sign upLogin

rapid7/metasploit-framework

View on GitHub
Star
modules/exploits/linux/local/glibc_realpath_priv_esc.rb

Summary

Maintainability
C
1 day
Test Coverage

Method initialize has 56 lines of code (exceeds 25 allowed). Consider refactoring.
Open

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => "glibc 'realpath()' Privilege Escalation",
Severity: Major
Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb - About 2 hrs to fix

    Method check has 39 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      def check
    version = kernel_release
    if Rex::Version.new(version.split('-').first) < Rex::Version.new('2.6.36')
      vprint_error "Linux kernel version #{version} is not vulnerable"
      return CheckCode::Safe
    Severity: Minor
    Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb - About 1 hr to fix

      Method check has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
      Open

        def check
    version = kernel_release
    if Rex::Version.new(version.split('-').first) < Rex::Version.new('2.6.36')
      vprint_error "Linux kernel version #{version} is not vulnerable"
      return CheckCode::Safe
      Severity: Minor
      Found in modules/exploits/linux/local/glibc_realpath_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

      Method exploit has a Cognitive Complexity of 8 (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/glibc_realpath_priv_esc.rb - About 45 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

      Avoid too many return statements within this method.
      Open

            return CheckCode::Unknown
      Severity: Major
      Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb - About 30 mins to fix

        Avoid too many return statements within this method.
        Open

              return CheckCode::Safe
        Severity: Major
        Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb - About 30 mins to fix

          Avoid too many return statements within this method.
          Open

                return CheckCode::Safe
          Severity: Major
          Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb - About 30 mins to fix

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

              def live_compile?
    return false unless datastore['COMPILE'].eql?('Auto') || datastore['COMPILE'].eql?('True')

    if has_gcc?
      vprint_good 'gcc is installed'
            Severity: Minor
            Found in modules/exploits/linux/local/glibc_realpath_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

            Identical blocks of code found in 5 locations. Consider refactoring.
            Open

              def live_compile?
    return false unless datastore['COMPILE'].eql?('Auto') || datastore['COMPILE'].eql?('True')

    if has_gcc?
      vprint_good 'gcc is installed'
            Severity: Major
            Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb and 4 other locations - About 30 mins to fix
            modules/exploits/linux/local/af_packet_packet_set_ring_priv_esc.rb on lines 122..131
            modules/exploits/linux/local/nested_namespace_idmap_limit_priv_esc.rb on lines 138..147
            modules/exploits/linux/local/recvmmsg_priv_esc.rb on lines 100..109
            modules/exploits/linux/local/ufo_privilege_escalation.rb on lines 124..133

            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

            Similar blocks of code found in 22 locations. Consider refactoring.
            Open

                      [ 'BID', '102525' ],
          [ 'CVE', '2018-1000001' ],
          [ 'EDB', '43775' ],
          [ 'URL', 'https://www.halfdog.net/Security/2017/LibcRealpathBufferUnderflow/' ],
          [ 'URL', 'http://www.openwall.com/lists/oss-security/2018/01/11/5' ],
            Severity: Major
            Found in modules/exploits/linux/local/glibc_realpath_priv_esc.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/systemtap_modprobe_options_priv_esc.rb on lines 43..51
            modules/exploits/linux/misc/cisco_ios_xe_rce.rb on lines 52..65
            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

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

              def on_new_session(client)
    # remove root owned SUID executable
    if client.type.eql? 'meterpreter'
      client.core.use 'stdapi' unless client.ext.aliases.include? 'stdapi'
      client.fs.file.rm @executable_path
            Severity: Minor
            Found in modules/exploits/linux/local/glibc_realpath_priv_esc.rb and 1 other location - About 20 mins to fix
            modules/exploits/linux/local/glibc_ld_audit_dso_load_priv_esc.rb on lines 155..161

            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

            There are no issues that match your filters.

            Category
            Status