BASH PATCH REPORT
			     =================

Bash-Release: 3.2
Patch-ID: bash32-057

Bug-Reported-by:	Michal Zalewski <lcamtuf@coredump.cx>
Bug-Reference-ID:
Bug-Reference-URL:

Bug-Description:

A combination of nested command substitutions and function importing from
the environment can cause bash to execute code appearing in the environment
variable value following the function definition.

Patch:

*** ../bash-3.2.56/builtins/evalstring.c	2014-09-16 19:08:02.000000000 -0400
--- builtins/evalstring.c	2014-10-04 15:58:35.000000000 -0400
***************
*** 44,47 ****
--- 44,48 ----
  #include "../redir.h"
  #include "../trap.h"
+ #include "../bashintl.h"
  
  #if defined (HISTORY)
***************
*** 235,244 ****
  	      struct fd_bitmap *bitmap;
  
! 	      if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
  		{
! 		  internal_warning ("%s: ignoring function definition attempt", from_file);
! 		  should_jump_to_top_level = 0;
! 		  last_result = last_command_exit_value = EX_BADUSAGE;
! 		  break;
  		}
  
--- 236,258 ----
  	      struct fd_bitmap *bitmap;
  
! 	      if (flags & SEVAL_FUNCDEF)
  		{
! 		  char *x;
! 
! 		  /* If the command parses to something other than a straight
! 		     function definition, or if we have not consumed the entire
! 		     string, or if the parser has transformed the function
! 		     name (as parsing will if it begins or ends with shell
! 		     whitespace, for example), reject the attempt */
! 		  if (command->type != cm_function_def ||
! 		      ((x = parser_remaining_input ()) && *x) ||
! 		      (STREQ (from_file, command->value.Function_def->name->word) == 0))
! 		    {
! 		      internal_warning (_("%s: ignoring function definition attempt"), from_file);
! 		      should_jump_to_top_level = 0;
! 		      last_result = last_command_exit_value = EX_BADUSAGE;
! 		      reset_parser ();
! 		      break;
! 		    }
  		}
  
***************
*** 302,306 ****
  
  	      if (flags & SEVAL_ONECMD)
! 		break;
  	    }
  	}
--- 316,323 ----
  
  	      if (flags & SEVAL_ONECMD)
! 		{
! 		  reset_parser ();
! 		  break;
! 		}
  	    }
  	}
*** ../bash-3.2.56/parse.y	2014-09-30 19:43:22.000000000 -0400
--- parse.y	2014-10-04 15:58:35.000000000 -0400
***************
*** 2125,2128 ****
--- 2125,2138 ----
  }
  
+ char *
+ parser_remaining_input ()
+ {
+   if (shell_input_line == 0)
+     return 0;
+   if (shell_input_line_index < 0 || shell_input_line_index >= shell_input_line_len)
+     return '\0';	/* XXX */
+   return (shell_input_line + shell_input_line_index);
+ }
+ 
  #ifdef INCLUDE_UNUSED
  /* Back the input pointer up by one, effectively `ungetting' a character. */
*** ../bash-3.2.56/shell.h	2008-04-28 22:00:24.000000000 -0400
--- shell.h	2014-10-04 15:58:35.000000000 -0400
***************
*** 161,164 ****
--- 161,166 ----
  
  /* Let's try declaring these here. */
+ extern char *parser_remaining_input __P((void));
+ 
  extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
  extern void restore_parser_state __P((sh_parser_state_t *));
*** ../bash-3.2/patchlevel.h	Thu Apr 13 08:31:04 2006
--- patchlevel.h	Mon Oct 16 14:22:54 2006
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 56
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 57
  
  #endif /* _PATCHLEVEL_H_ */