Nesting error and Crash When Debugging

[gwillcox-r7]

Seem to keep getting this nesting error after I leave the debugger idle for too long:

["DEBUGGER Exception: /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:1108",
 #<NoMethodError: undefined method `nesting' for Msf::Module:Class>,
 ["(eval):1:in `check'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `eval'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `search_const'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:853:in `process_dap'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:1097:in `wait_next_action_'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:797:in `wait_next_action'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:310:in `suspend'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:344:in `block in step_tp'",
  "/home/gwillcox/git/metasploit-framework/modules/exploits/unix/http/pfsense_pfblockerng_webshell.rb:107:in `check'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/exploit/remote/auto_check.rb:44:in `with_prepended_auto_check'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/exploit/remote/auto_check.rb:26:in `exploit'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/exploit_driver.rb:228:in `job_run_proc'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/exploit_driver.rb:181:in `run'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/base/simple/exploit.rb:144:in `exploit_simple'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/base/simple/exploit.rb:171:in `exploit_simple'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/ui/console/command_dispatcher/exploit.rb:45:in `exploit_single'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/ui/console/command_dispatcher/exploit.rb:182:in `cmd_exploit'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:581:in `run_command'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:530:in `block in run_single'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `run_single'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/shell.rb:162:in `run'",
  "/home/gwillcox/git/metasploit-framework/lib/metasploit/framework/command/console.rb:48:in `start'",
  "/home/gwillcox/git/metasploit-framework/lib/metasploit/framework/command/base.rb:82:in `start'",
  "/home/gwillcox/git/metasploit-framework/msfconsole:23:in `<main>'"]]
[-] Exploit failed: NoMethodError undefined method `nesting' for Msf::Module:Class

Any reason this might be occurring?

[ko1]

Ah, I see. I will workaround into debug.gem but not sure it solves the issue.

If you can, could you try this patch?

diff --git a/lib/debug/thread_client.rb b/lib/debug/thread_client.rb
index 5f2d100..0a0cb00 100644
--- a/lib/debug/thread_client.rb
+++ b/lib/debug/thread_client.rb
@@ -568,7 +568,7 @@ module DEBUGGER__
         unless only_self
           s.ancestors.each{|c| break if c == Object; cs[c] = :ancestors}
           if b = current_frame&.binding
-            b.eval('Module.nesting').each{|c| cs[c] = :nesting unless cs.has_key? c}
+            b.eval('::Module.nesting').each{|c| cs[c] = :nesting unless cs.has_key? c}
           end
         end

[gwillcox-r7]

Edit: Was apparently working but then hit the issue again with the patch. Here is the stack trace:

["DEBUGGER Exception: /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:1108",
 #<NoMethodError: undefined method `nesting' for Msf::Module:Class>,
 ["(eval):1:in `block in run'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `eval'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `search_const'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:853:in `process_dap'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:1097:in `wait_next_action_'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:797:in `wait_next_action'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:310:in `suspend'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:344:in `block in step_tp'",
  "/home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:388:in `block in run'",
  "/home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:383:in `each'",
  "/home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:383:in `run'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/base/simple/auxiliary.rb:178:in `job_run_proc'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/base/simple/auxiliary.rb:85:in `run_simple'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/base/simple/auxiliary.rb:96:in `run_simple'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/ui/console/command_dispatcher/auxiliary.rb:82:in `block in cmd_run'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:62:in `block in each'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:151:in `<<'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:151:in `block (3 levels) in parse'",
  "/home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/rex-socket-0.1.43/lib/rex/socket/range_walker.rb:234:in `each_host'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:146:in `block (2 levels) in parse'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:114:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:114:in `block in parse'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:61:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:61:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/core/rhosts_walker.rb:61:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/msf/ui/console/command_dispatcher/auxiliary.rb:78:in `cmd_run'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:581:in `run_command'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:530:in `block in run_single'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `each'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb:524:in `run_single'",
  "/home/gwillcox/git/metasploit-framework/lib/rex/ui/text/shell.rb:162:in `run'",
  "/home/gwillcox/git/metasploit-framework/lib/metasploit/framework/command/console.rb:48:in `start'",
  "/home/gwillcox/git/metasploit-framework/lib/metasploit/framework/command/base.rb:82:in `start'",
  "/home/gwillcox/git/metasploit-framework/msfconsole:23:in `<main>'"]]
[-] Auxiliary failed: NoMethodError undefined method `nesting' for Msf::Module:Class
[-] Call stack:
[-]   (eval):1:in `block in run'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `eval'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:914:in `search_const'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/server_dap.rb:853:in `process_dap'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:1097:in `wait_next_action_'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:797:in `wait_next_action'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:310:in `suspend'
[-]   /home/gwillcox/.rbenv/versions/3.0.2/lib/ruby/gems/3.0.0/gems/debug-1.6.2/lib/debug/thread_client.rb:344:in `block in step_tp'
[-]   /home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:388:in `block in run'
[-]   /home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:383:in `each'
[-]   /home/gwillcox/git/metasploit-framework/modules/auxiliary/gather/ldap_esc1_cert_finder.rb:383:in `run'
[*] Auxiliary module execution completed

[ko1]

Thank you above PR will fix this issue.