BASH PATCH REPORT ================= Bash-Release: 3.0 Patch-ID: bash30-017 Bug-Reported-by: Stephane Chazelas Bug-Reference-ID: Bug-Reference-URL: Bug-Description: Under certain circumstances, bash will execute user code while processing the environment for exported function definitions. Patch: *** ../bash-3.0.16/builtins/common.h 2004-04-23 16:51:00.000000000 -0400 --- builtins/common.h 2014-09-16 21:57:03.000000000 -0400 *************** *** 34,37 **** --- 34,39 ---- /* Flags for describe_command, shared between type.def and command.def */ + #define SEVAL_FUNCDEF 0x080 /* only allow function definitions */ + #define SEVAL_ONECMD 0x100 /* only allow a single command */ #define CDESC_ALL 0x001 /* type -a */ #define CDESC_SHORTDESC 0x002 /* command -V */ *** ../bash-3.0.16/builtins/evalstring.c 2003-06-03 13:53:12.000000000 -0400 --- builtins/evalstring.c 2014-09-16 21:57:03.000000000 -0400 *************** *** 220,223 **** --- 220,231 ---- 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; + } + bitmap = new_fd_bitmap (FD_BITMAP_SIZE); begin_unwind_frame ("pe_dispose"); *************** *** 271,274 **** --- 279,285 ---- dispose_fd_bitmap (bitmap); discard_unwind_frame ("pe_dispose"); + + if (flags & SEVAL_ONECMD) + break; } } *** ../bash-3.0.16/variables.c 2004-09-08 11:07:44.000000000 -0400 --- variables.c 2014-09-16 21:57:03.000000000 -0400 *************** *** 299,308 **** strcpy (temp_string + char_index + 1, string); ! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST); ! ! /* Ancient backwards compatibility. Old versions of bash exported ! functions like name()=() {...} */ ! if (name[char_index - 1] == ')' && name[char_index - 2] == '(') ! name[char_index - 2] = '\0'; if (temp_var = find_function (name)) --- 299,306 ---- strcpy (temp_string + char_index + 1, string); ! /* Don't import function names that are invalid identifiers from the ! environment. */ ! if (legal_identifier (name)) ! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD); if (temp_var = find_function (name)) *************** *** 313,320 **** else report_error (_("error importing function definition for `%s'"), name); - - /* ( */ - if (name[char_index - 1] == ')' && name[char_index - 2] == '\0') - name[char_index - 2] = '('; /* ) */ } #if defined (ARRAY_VARS) --- 311,314 ---- *** ../bash-3.0/patchlevel.h Wed Aug 22 08:05:39 2001 --- patchlevel.h Thu Sep 2 15:04:32 2004 *************** *** 26,30 **** looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 16 #endif /* _PATCHLEVEL_H_ */ --- 26,30 ---- looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 17 #endif /* _PATCHLEVEL_H_ */