133 lines
3.8 KiB
Plaintext
133 lines
3.8 KiB
Plaintext
BASH PATCH REPORT
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=================
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Bash-Release: 4.3
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Patch-ID: bash43-030
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Bug-Reported-by: Michal Zalewski <lcamtuf@coredump.cx>
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Bug-Reference-ID:
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Bug-Reference-URL:
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Bug-Description:
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A combination of nested command substitutions and function importing from
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the environment can cause bash to execute code appearing in the environment
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variable value following the function definition.
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Patch (apply with `patch -p0'):
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*** ../bash-4.3.29/builtins/evalstring.c 2014-10-01 12:57:47.000000000 -0400
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--- builtins/evalstring.c 2014-10-03 11:57:04.000000000 -0400
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***************
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*** 309,318 ****
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struct fd_bitmap *bitmap;
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! if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
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{
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! internal_warning ("%s: ignoring function definition attempt", from_file);
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! should_jump_to_top_level = 0;
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! last_result = last_command_exit_value = EX_BADUSAGE;
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! break;
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}
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--- 313,335 ----
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struct fd_bitmap *bitmap;
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! if (flags & SEVAL_FUNCDEF)
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{
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! char *x;
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!
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! /* If the command parses to something other than a straight
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! function definition, or if we have not consumed the entire
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! string, or if the parser has transformed the function
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! name (as parsing will if it begins or ends with shell
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! whitespace, for example), reject the attempt */
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! if (command->type != cm_function_def ||
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! ((x = parser_remaining_input ()) && *x) ||
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! (STREQ (from_file, command->value.Function_def->name->word) == 0))
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! {
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! internal_warning (_("%s: ignoring function definition attempt"), from_file);
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! should_jump_to_top_level = 0;
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! last_result = last_command_exit_value = EX_BADUSAGE;
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! reset_parser ();
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! break;
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! }
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}
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***************
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*** 379,383 ****
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if (flags & SEVAL_ONECMD)
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! break;
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}
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}
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--- 396,403 ----
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if (flags & SEVAL_ONECMD)
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! {
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! reset_parser ();
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! break;
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! }
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}
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}
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*** ../bash-4.3.29/parse.y 2014-10-01 12:58:43.000000000 -0400
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--- parse.y 2014-10-03 14:48:59.000000000 -0400
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***************
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*** 2539,2542 ****
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--- 2539,2552 ----
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}
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+ char *
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+ parser_remaining_input ()
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+ {
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+ if (shell_input_line == 0)
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+ return 0;
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+ if (shell_input_line_index < 0 || shell_input_line_index >= shell_input_line_len)
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+ return '\0'; /* XXX */
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+ return (shell_input_line + shell_input_line_index);
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+ }
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+
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#ifdef INCLUDE_UNUSED
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/* Back the input pointer up by one, effectively `ungetting' a character. */
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***************
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*** 4028,4033 ****
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/* reset_parser clears shell_input_line and associated variables */
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restore_input_line_state (&ls);
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! if (interactive)
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! token_to_read = 0;
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/* Need to find how many characters parse_and_execute consumed, update
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--- 4053,4058 ----
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/* reset_parser clears shell_input_line and associated variables */
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restore_input_line_state (&ls);
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!
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! token_to_read = 0;
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/* Need to find how many characters parse_and_execute consumed, update
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*** ../bash-4.3.29/shell.h 2014-10-01 12:57:39.000000000 -0400
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--- shell.h 2014-10-03 14:49:12.000000000 -0400
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***************
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*** 181,184 ****
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--- 181,186 ----
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/* Let's try declaring these here. */
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+ extern char *parser_remaining_input __P((void));
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+
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extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
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extern void restore_parser_state __P((sh_parser_state_t *));
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*** ../bash-4.3/patchlevel.h 2012-12-29 10:47:57.000000000 -0500
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--- patchlevel.h 2014-03-20 20:01:28.000000000 -0400
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***************
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*** 26,30 ****
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 29
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#endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 30
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#endif /* _PATCHLEVEL_H_ */
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