1#!./perl -T 2# 3# Taint tests by Tom Phoenix <rootbeer@teleport.com>. 4# 5# I don't claim to know all about tainting. If anyone sees 6# tests that I've missed here, please add them. But this is 7# better than having no tests at all, right? 8# 9 10BEGIN { 11 chdir 't' if -d 't'; 12 @INC = '../lib'; 13} 14 15use strict; 16use Config; 17use File::Spec::Functions; 18 19my $test = 177; 20sub ok ($;$) { 21 my($ok, $name) = @_; 22 23 # You have to do it this way or VMS will get confused. 24 print $ok ? "ok $test - $name\n" : "not ok $test - $name\n"; 25 26 printf "# Failed test at line %d\n", (caller)[2] unless $ok; 27 28 $test++; 29 return $ok; 30} 31 32 33$| = 1; 34 35use vars qw($ipcsysv); # did we manage to load IPC::SysV? 36 37BEGIN { 38 if ($^O eq 'VMS' && !defined($Config{d_setenv})) { 39 $ENV{PATH} = $ENV{PATH}; 40 $ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy'; 41 } 42 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ 43 && ($Config{d_shm} || $Config{d_msg})) { 44 eval { require IPC::SysV }; 45 unless ($@) { 46 $ipcsysv++; 47 IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU IPC_NOWAIT)); 48 } 49 } 50} 51 52my $Is_MacOS = $^O eq 'MacOS'; 53my $Is_VMS = $^O eq 'VMS'; 54my $Is_MSWin32 = $^O eq 'MSWin32'; 55my $Is_NetWare = $^O eq 'NetWare'; 56my $Is_Dos = $^O eq 'dos'; 57my $Is_Cygwin = $^O eq 'cygwin'; 58my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.' : 59 ($Is_MSWin32 ? '.\perl' : 60 $Is_MacOS ? ':perl' : 61 ($Is_NetWare ? 'perl' : './perl')); 62my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/; 63 64if ($Is_VMS) { 65 my (%old, $x); 66 for $x ('DCL$PATH', @MoreEnv) { 67 ($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x}; 68 } 69 eval <<EndOfCleanup; 70 END { 71 \$ENV{PATH} = '' if $Config{d_setenv}; 72 warn "# Note: logical name 'PATH' may have been deleted\n"; 73 \@ENV{keys %old} = values %old; 74 } 75EndOfCleanup 76} 77 78# Sources of taint: 79# The empty tainted value, for tainting strings 80my $TAINT = substr($^X, 0, 0); 81# A tainted zero, useful for tainting numbers 82my $TAINT0 = 0 + $TAINT; 83 84# This taints each argument passed. All must be lvalues. 85# Side effect: It also stringifies them. :-( 86sub taint_these (@) { 87 for (@_) { $_ .= $TAINT } 88} 89 90# How to identify taint when you see it 91sub any_tainted (@) { 92 not eval { join("",@_), kill 0; 1 }; 93} 94sub tainted ($) { 95 any_tainted @_; 96} 97sub all_tainted (@) { 98 for (@_) { return 0 unless tainted $_ } 99 1; 100} 101 102sub test ($$;$) { 103 my($serial, $boolean, $diag) = @_; 104 if ($boolean) { 105 print "ok $serial\n"; 106 } else { 107 print "not ok $serial\n"; 108 for (split m/^/m, $diag) { 109 print "# $_"; 110 } 111 print "\n" unless 112 $diag eq '' 113 or substr($diag, -1) eq "\n"; 114 } 115} 116 117# We need an external program to call. 118my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : $Is_MacOS ? ":echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$")); 119END { unlink $ECHO } 120open PROG, "> $ECHO" or die "Can't create $ECHO: $!"; 121print PROG 'print "@ARGV\n"', "\n"; 122close PROG; 123my $echo = "$Invoke_Perl $ECHO"; 124 125my $TEST = catfile(curdir(), 'TEST'); 126 127print "1..223\n"; 128 129# First, let's make sure that Perl is checking the dangerous 130# environment variables. Maybe they aren't set yet, so we'll 131# taint them ourselves. 132{ 133 $ENV{'DCL$PATH'} = '' if $Is_VMS; 134 135 $ENV{PATH} = ''; 136 delete @ENV{@MoreEnv}; 137 $ENV{TERM} = 'dumb'; 138 139 if ($Is_Cygwin && ! -f 'cygwin1.dll') { 140 system("/usr/bin/cp /usr/bin/cygwin1.dll .") && 141 die "$0: failed to cp cygwin1.dll: $!\n"; 142 eval q{ 143 END { unlink "cygwin1.dll" } 144 }; 145 } 146 147 if ($Is_Cygwin && ! -f 'cygcrypt-0.dll' && -f '/usr/bin/cygcrypt-0.dll') { 148 system("/usr/bin/cp /usr/bin/cygcrypt-0.dll .") && 149 die "$0: failed to cp cygcrypt-0.dll: $!\n"; 150 eval q{ 151 END { unlink "cygcrypt-0.dll" } 152 }; 153 } 154 155 test 1, eval { `$echo 1` } eq "1\n"; 156 157 if ($Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos || $Is_MacOS) { 158 print "# Environment tainting tests skipped\n"; 159 for (2..5) { print "ok $_\n" } 160 } 161 else { 162 my @vars = ('PATH', @MoreEnv); 163 while (my $v = $vars[0]) { 164 local $ENV{$v} = $TAINT; 165 last if eval { `$echo 1` }; 166 last unless $@ =~ /^Insecure \$ENV{$v}/; 167 shift @vars; 168 } 169 test 2, !@vars, "\$$vars[0]"; 170 171 # tainted $TERM is unsafe only if it contains metachars 172 local $ENV{TERM}; 173 $ENV{TERM} = 'e=mc2'; 174 test 3, eval { `$echo 1` } eq "1\n"; 175 $ENV{TERM} = 'e=mc2' . $TAINT; 176 test 4, eval { `$echo 1` } eq ''; 177 test 5, $@ =~ /^Insecure \$ENV{TERM}/, $@; 178 } 179 180 my $tmp; 181 if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) { 182 print "# all directories are writeable\n"; 183 } 184 else { 185 $tmp = (grep { defined and -d and (stat _)[2] & 2 } 186 qw(sys$scratch /tmp /var/tmp /usr/tmp), 187 @ENV{qw(TMP TEMP)})[0] 188 or print "# can't find world-writeable directory to test PATH\n"; 189 } 190 191 if ($tmp) { 192 local $ENV{PATH} = $tmp; 193 test 6, eval { `$echo 1` } eq ''; 194 test 7, $@ =~ /^Insecure directory in \$ENV{PATH}/, $@; 195 } 196 else { 197 for (6..7) { print "ok $_ # Skipped: all directories are writeable\n" } 198 } 199 200 if ($Is_VMS) { 201 $ENV{'DCL$PATH'} = $TAINT; 202 test 8, eval { `$echo 1` } eq ''; 203 test 9, $@ =~ /^Insecure \$ENV{DCL\$PATH}/, $@; 204 if ($tmp) { 205 $ENV{'DCL$PATH'} = $tmp; 206 test 10, eval { `$echo 1` } eq ''; 207 test 11, $@ =~ /^Insecure directory in \$ENV{DCL\$PATH}/, $@; 208 } 209 else { 210 for (10..11) { print "ok $_ # Skipped: can't find world-writeable directory to test DCL\$PATH\n" } 211 } 212 $ENV{'DCL$PATH'} = ''; 213 } 214 else { 215 for (8..11) { print "ok $_ # Skipped: This is not VMS\n"; } 216 } 217} 218 219# Let's see that we can taint and untaint as needed. 220{ 221 my $foo = $TAINT; 222 test 12, tainted $foo; 223 224 # That was a sanity check. If it failed, stop the insanity! 225 die "Taint checks don't seem to be enabled" unless tainted $foo; 226 227 $foo = "foo"; 228 test 13, not tainted $foo; 229 230 taint_these($foo); 231 test 14, tainted $foo; 232 233 my @list = 1..10; 234 test 15, not any_tainted @list; 235 taint_these @list[1,3,5,7,9]; 236 test 16, any_tainted @list; 237 test 17, all_tainted @list[1,3,5,7,9]; 238 test 18, not any_tainted @list[0,2,4,6,8]; 239 240 ($foo) = $foo =~ /(.+)/; 241 test 19, not tainted $foo; 242 243 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/; 244 test 20, not tainted $foo; 245 test 21, $foo eq 'bar'; 246 247 { 248 use re 'taint'; 249 250 ($foo) = ('bar' . $TAINT) =~ /(.+)/; 251 test 22, tainted $foo; 252 test 23, $foo eq 'bar'; 253 254 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/; 255 test 24, tainted $foo; 256 test 25, $foo eq 'bar'; 257 } 258 259 $foo = $1 if 'bar' =~ /(.+)$TAINT/; 260 test 26, tainted $foo; 261 test 27, $foo eq 'bar'; 262 263 my $pi = 4 * atan2(1,1) + $TAINT0; 264 test 28, tainted $pi; 265 266 ($pi) = $pi =~ /(\d+\.\d+)/; 267 test 29, not tainted $pi; 268 test 30, sprintf("%.5f", $pi) eq '3.14159'; 269} 270 271# How about command-line arguments? The problem is that we don't 272# always get some, so we'll run another process with some. 273SKIP: { 274 my $arg = catfile(curdir(), "arg$$"); 275 open PROG, "> $arg" or die "Can't create $arg: $!"; 276 print PROG q{ 277 eval { join('', @ARGV), kill 0 }; 278 exit 0 if $@ =~ /^Insecure dependency/; 279 print "# Oops: \$@ was [$@]\n"; 280 exit 1; 281 }; 282 close PROG; 283 print `$Invoke_Perl "-T" $arg and some suspect arguments`; 284 test 31, !$?, "Exited with status $?"; 285 unlink $arg; 286} 287 288# Reading from a file should be tainted 289{ 290 test 32, open(FILE, $TEST), "Couldn't open '$TEST': $!"; 291 292 my $block; 293 sysread(FILE, $block, 100); 294 my $line = <FILE>; 295 close FILE; 296 test 33, tainted $block; 297 test 34, tainted $line; 298} 299 300# Globs should be forbidden, except under VMS, 301# which doesn't spawn an external program. 302if (1 # built-in glob 303 or $Is_VMS) { 304 for (35..36) { print "ok $_\n"; } 305} 306else { 307 my @globs = eval { <*> }; 308 test 35, @globs == 0 && $@ =~ /^Insecure dependency/; 309 310 @globs = eval { glob '*' }; 311 test 36, @globs == 0 && $@ =~ /^Insecure dependency/; 312} 313 314# Output of commands should be tainted 315{ 316 my $foo = `$echo abc`; 317 test 37, tainted $foo; 318} 319 320# Certain system variables should be tainted 321{ 322 test 38, all_tainted $^X, $0; 323} 324 325# Results of matching should all be untainted 326{ 327 my $foo = "abcdefghi" . $TAINT; 328 test 39, tainted $foo; 329 330 $foo =~ /def/; 331 test 40, not any_tainted $`, $&, $'; 332 333 $foo =~ /(...)(...)(...)/; 334 test 41, not any_tainted $1, $2, $3, $+; 335 336 my @bar = $foo =~ /(...)(...)(...)/; 337 test 42, not any_tainted @bar; 338 339 test 43, tainted $foo; # $foo should still be tainted! 340 test 44, $foo eq "abcdefghi"; 341} 342 343# Operations which affect files can't use tainted data. 344{ 345 test 45, eval { chmod 0, $TAINT } eq '', 'chmod'; 346 test 46, $@ =~ /^Insecure dependency/, $@; 347 348 # There is no feature test in $Config{} for truncate, 349 # so we allow for the possibility that it's missing. 350 test 47, eval { truncate 'NoSuChFiLe', $TAINT0 } eq '', 'truncate'; 351 test 48, $@ =~ /^(?:Insecure dependency|truncate not implemented)/, $@; 352 353 test 49, eval { rename '', $TAINT } eq '', 'rename'; 354 test 50, $@ =~ /^Insecure dependency/, $@; 355 356 test 51, eval { unlink $TAINT } eq '', 'unlink'; 357 test 52, $@ =~ /^Insecure dependency/, $@; 358 359 test 53, eval { utime $TAINT } eq '', 'utime'; 360 test 54, $@ =~ /^Insecure dependency/, $@; 361 362 if ($Config{d_chown}) { 363 test 55, eval { chown -1, -1, $TAINT } eq '', 'chown'; 364 test 56, $@ =~ /^Insecure dependency/, $@; 365 } 366 else { 367 for (55..56) { print "ok $_ # Skipped: chown() is not available\n" } 368 } 369 370 if ($Config{d_link}) { 371 test 57, eval { link $TAINT, '' } eq '', 'link'; 372 test 58, $@ =~ /^Insecure dependency/, $@; 373 } 374 else { 375 for (57..58) { print "ok $_ # Skipped: link() is not available\n" } 376 } 377 378 if ($Config{d_symlink}) { 379 test 59, eval { symlink $TAINT, '' } eq '', 'symlink'; 380 test 60, $@ =~ /^Insecure dependency/, $@; 381 } 382 else { 383 for (59..60) { print "ok $_ # Skipped: symlink() is not available\n" } 384 } 385} 386 387# Operations which affect directories can't use tainted data. 388{ 389 test 61, eval { mkdir $TAINT0, $TAINT } eq '', 'mkdir'; 390 test 62, $@ =~ /^Insecure dependency/, $@; 391 392 test 63, eval { rmdir $TAINT } eq '', 'rmdir'; 393 test 64, $@ =~ /^Insecure dependency/, $@; 394 395 test 65, eval { chdir $TAINT } eq '', 'chdir'; 396 test 66, $@ =~ /^Insecure dependency/, $@; 397 398 if ($Config{d_chroot}) { 399 test 67, eval { chroot $TAINT } eq '', 'chroot'; 400 test 68, $@ =~ /^Insecure dependency/, $@; 401 } 402 else { 403 for (67..68) { print "ok $_ # Skipped: chroot() is not available\n" } 404 } 405} 406 407# Some operations using files can't use tainted data. 408{ 409 my $foo = "imaginary library" . $TAINT; 410 test 69, eval { require $foo } eq '', 'require'; 411 test 70, $@ =~ /^Insecure dependency/, $@; 412 413 my $filename = "./taintB$$"; # NB: $filename isn't tainted! 414 END { unlink $filename if defined $filename } 415 $foo = $filename . $TAINT; 416 unlink $filename; # in any case 417 418 test 71, eval { open FOO, $foo } eq '', 'open for read'; 419 test 72, $@ eq '', $@; # NB: This should be allowed 420 421 # Try first new style but allow also old style. 422 # We do not want the whole taint.t to fail 423 # just because Errno possibly failing. 424 test 73, eval('$!{ENOENT}') || 425 $! == 2 || # File not found 426 ($Is_Dos && $! == 22) || 427 ($^O eq 'mint' && $! == 33); 428 429 test 74, eval { open FOO, "> $foo" } eq '', 'open for write'; 430 test 75, $@ =~ /^Insecure dependency/, $@; 431} 432 433# Commands to the system can't use tainted data 434{ 435 my $foo = $TAINT; 436 437 if ($^O eq 'amigaos') { 438 for (76..79) { print "ok $_ # Skipped: open('|') is not available\n" } 439 } 440 else { 441 test 76, eval { open FOO, "| x$foo" } eq '', 'popen to'; 442 test 77, $@ =~ /^Insecure dependency/, $@; 443 444 test 78, eval { open FOO, "x$foo |" } eq '', 'popen from'; 445 test 79, $@ =~ /^Insecure dependency/, $@; 446 } 447 448 test 80, eval { exec $TAINT } eq '', 'exec'; 449 test 81, $@ =~ /^Insecure dependency/, $@; 450 451 test 82, eval { system $TAINT } eq '', 'system'; 452 test 83, $@ =~ /^Insecure dependency/, $@; 453 454 $foo = "*"; 455 taint_these $foo; 456 457 test 84, eval { `$echo 1$foo` } eq '', 'backticks'; 458 test 85, $@ =~ /^Insecure dependency/, $@; 459 460 if ($Is_VMS) { # wildcard expansion doesn't invoke shell, so is safe 461 test 86, join('', eval { glob $foo } ) ne '', 'globbing'; 462 test 87, $@ eq '', $@; 463 } 464 else { 465 for (86..87) { print "ok $_ # Skipped: This is not VMS\n"; } 466 } 467} 468 469# Operations which affect processes can't use tainted data. 470{ 471 test 88, eval { kill 0, $TAINT } eq '', 'kill'; 472 test 89, $@ =~ /^Insecure dependency/, $@; 473 474 if ($Config{d_setpgrp}) { 475 test 90, eval { setpgrp 0, $TAINT } eq '', 'setpgrp'; 476 test 91, $@ =~ /^Insecure dependency/, $@; 477 } 478 else { 479 for (90..91) { print "ok $_ # Skipped: setpgrp() is not available\n" } 480 } 481 482 if ($Config{d_setprior}) { 483 test 92, eval { setpriority 0, $TAINT, $TAINT } eq '', 'setpriority'; 484 test 93, $@ =~ /^Insecure dependency/, $@; 485 } 486 else { 487 for (92..93) { print "ok $_ # Skipped: setpriority() is not available\n" } 488 } 489} 490 491# Some miscellaneous operations can't use tainted data. 492{ 493 if ($Config{d_syscall}) { 494 test 94, eval { syscall $TAINT } eq '', 'syscall'; 495 test 95, $@ =~ /^Insecure dependency/, $@; 496 } 497 else { 498 for (94..95) { print "ok $_ # Skipped: syscall() is not available\n" } 499 } 500 501 { 502 my $foo = "x" x 979; 503 taint_these $foo; 504 local *FOO; 505 my $temp = "./taintC$$"; 506 END { unlink $temp } 507 test 96, open(FOO, "> $temp"), "Couldn't open $temp for write: $!"; 508 509 test 97, eval { ioctl FOO, $TAINT, $foo } eq '', 'ioctl'; 510 test 98, $@ =~ /^Insecure dependency/, $@; 511 512 if ($Config{d_fcntl}) { 513 test 99, eval { fcntl FOO, $TAINT, $foo } eq '', 'fcntl'; 514 test 100, $@ =~ /^Insecure dependency/, $@; 515 } 516 else { 517 for (99..100) { print "ok $_ # Skipped: fcntl() is not available\n" } 518 } 519 520 close FOO; 521 } 522} 523 524# Some tests involving references 525{ 526 my $foo = 'abc' . $TAINT; 527 my $fooref = \$foo; 528 test 101, not tainted $fooref; 529 test 102, tainted $$fooref; 530 test 103, tainted $foo; 531} 532 533# Some tests involving assignment 534{ 535 my $foo = $TAINT0; 536 my $bar = $foo; 537 test 104, all_tainted $foo, $bar; 538 test 105, tainted($foo = $bar); 539 test 106, tainted($bar = $bar); 540 test 107, tainted($bar += $bar); 541 test 108, tainted($bar -= $bar); 542 test 109, tainted($bar *= $bar); 543 test 110, tainted($bar++); 544 test 111, tainted($bar /= $bar); 545 test 112, tainted($bar += 0); 546 test 113, tainted($bar -= 2); 547 test 114, tainted($bar *= -1); 548 test 115, tainted($bar /= 1); 549 test 116, tainted($bar--); 550 test 117, $bar == 0; 551} 552 553# Test assignment and return of lists 554{ 555 my @foo = ("A", "tainted" . $TAINT, "B"); 556 test 118, not tainted $foo[0]; 557 test 119, tainted $foo[1]; 558 test 120, not tainted $foo[2]; 559 my @bar = @foo; 560 test 121, not tainted $bar[0]; 561 test 122, tainted $bar[1]; 562 test 123, not tainted $bar[2]; 563 my @baz = eval { "A", "tainted" . $TAINT, "B" }; 564 test 124, not tainted $baz[0]; 565 test 125, tainted $baz[1]; 566 test 126, not tainted $baz[2]; 567 my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ]; 568 test 127, not tainted $plugh[0]; 569 test 128, tainted $plugh[1]; 570 test 129, not tainted $plugh[2]; 571 my $nautilus = sub { "A", "tainted" . $TAINT, "B" }; 572 test 130, not tainted ((&$nautilus)[0]); 573 test 131, tainted ((&$nautilus)[1]); 574 test 132, not tainted ((&$nautilus)[2]); 575 my @xyzzy = &$nautilus; 576 test 133, not tainted $xyzzy[0]; 577 test 134, tainted $xyzzy[1]; 578 test 135, not tainted $xyzzy[2]; 579 my $red_october = sub { return "A", "tainted" . $TAINT, "B" }; 580 test 136, not tainted ((&$red_october)[0]); 581 test 137, tainted ((&$red_october)[1]); 582 test 138, not tainted ((&$red_october)[2]); 583 my @corge = &$red_october; 584 test 139, not tainted $corge[0]; 585 test 140, tainted $corge[1]; 586 test 141, not tainted $corge[2]; 587} 588 589# Test for system/library calls returning string data of dubious origin. 590{ 591 # No reliable %Config check for getpw* 592 if (eval { setpwent(); getpwent() }) { 593 setpwent(); 594 my @getpwent = getpwent(); 595 die "getpwent: $!\n" unless (@getpwent); 596 test 142,( not tainted $getpwent[0] 597 and tainted $getpwent[1] 598 and not tainted $getpwent[2] 599 and not tainted $getpwent[3] 600 and not tainted $getpwent[4] 601 and not tainted $getpwent[5] 602 and tainted $getpwent[6] # ge?cos 603 and not tainted $getpwent[7] 604 and tainted $getpwent[8]); # shell 605 endpwent(); 606 } else { 607 for (142) { print "ok $_ # Skipped: getpwent() is not available\n" } 608 } 609 610 if ($Config{d_readdir}) { # pretty hard to imagine not 611 local(*D); 612 opendir(D, "op") or die "opendir: $!\n"; 613 my $readdir = readdir(D); 614 test 143, tainted $readdir; 615 closedir(OP); 616 } else { 617 for (143) { print "ok $_ # Skipped: readdir() is not available\n" } 618 } 619 620 if ($Config{d_readlink} && $Config{d_symlink}) { 621 my $symlink = "sl$$"; 622 unlink($symlink); 623 my $sl = "/something/naughty"; 624 # it has to be a real path on Mac OS 625 $sl = MacPerl::MakePath((MacPerl::Volumes())[0]) if $Is_MacOS; 626 symlink($sl, $symlink) or die "symlink: $!\n"; 627 my $readlink = readlink($symlink); 628 test 144, tainted $readlink; 629 unlink($symlink); 630 } else { 631 for (144) { print "ok $_ # Skipped: readlink() or symlink() is not available\n"; } 632 } 633} 634 635# test bitwise ops (regression bug) 636{ 637 my $why = "y"; 638 my $j = "x" | $why; 639 test 145, not tainted $j; 640 $why = $TAINT."y"; 641 $j = "x" | $why; 642 test 146, tainted $j; 643} 644 645# test target of substitution (regression bug) 646{ 647 my $why = $TAINT."y"; 648 $why =~ s/y/z/; 649 test 147, tainted $why; 650 651 my $z = "[z]"; 652 $why =~ s/$z/zee/; 653 test 148, tainted $why; 654 655 $why =~ s/e/'-'.$$/ge; 656 test 149, tainted $why; 657} 658 659# test shmread 660{ 661 unless ($ipcsysv) { 662 print "ok 150 # skipped: no IPC::SysV\n"; 663 last; 664 } 665 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ && $Config{d_shm}) { 666 no strict 'subs'; 667 my $sent = "foobar"; 668 my $rcvd; 669 my $size = 2000; 670 my $id = shmget(IPC_PRIVATE, $size, S_IRWXU); 671 672 if (defined $id) { 673 if (shmwrite($id, $sent, 0, 60)) { 674 if (shmread($id, $rcvd, 0, 60)) { 675 substr($rcvd, index($rcvd, "\0")) = ''; 676 } else { 677 warn "# shmread failed: $!\n"; 678 } 679 } else { 680 warn "# shmwrite failed: $!\n"; 681 } 682 shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n"; 683 } else { 684 warn "# shmget failed: $!\n"; 685 } 686 687 if ($rcvd eq $sent) { 688 test 150, tainted $rcvd; 689 } else { 690 print "ok 150 # Skipped: SysV shared memory operation failed\n"; 691 } 692 } else { 693 print "ok 150 # Skipped: SysV shared memory is not available\n"; 694 } 695} 696 697# test msgrcv 698{ 699 unless ($ipcsysv) { 700 print "ok 151 # skipped: no IPC::SysV\n"; 701 last; 702 } 703 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ && $Config{d_msg}) { 704 no strict 'subs'; 705 my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU); 706 707 my $sent = "message"; 708 my $type_sent = 1234; 709 my $rcvd; 710 my $type_rcvd; 711 712 if (defined $id) { 713 if (msgsnd($id, pack("l! a*", $type_sent, $sent), IPC_NOWAIT)) { 714 if (msgrcv($id, $rcvd, 60, 0, IPC_NOWAIT)) { 715 ($type_rcvd, $rcvd) = unpack("l! a*", $rcvd); 716 } else { 717 warn "# msgrcv failed: $!\n"; 718 } 719 } else { 720 warn "# msgsnd failed: $!\n"; 721 } 722 msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n"; 723 } else { 724 warn "# msgget failed\n"; 725 } 726 727 if ($rcvd eq $sent && $type_sent == $type_rcvd) { 728 test 151, tainted $rcvd; 729 } else { 730 print "ok 151 # Skipped: SysV message queue operation failed\n"; 731 } 732 } else { 733 print "ok 151 # Skipped: SysV message queues are not available\n"; 734 } 735} 736 737{ 738 # bug id 20001004.006 739 740 open IN, $TEST or warn "$0: cannot read $TEST: $!" ; 741 local $/; 742 my $a = <IN>; 743 my $b = <IN>; 744 print "not " unless tainted($a) && tainted($b) && !defined($b); 745 print "ok 152\n"; 746 close IN; 747} 748 749{ 750 # bug id 20001004.007 751 752 open IN, $TEST or warn "$0: cannot read $TEST: $!" ; 753 my $a = <IN>; 754 755 my $c = { a => 42, 756 b => $a }; 757 print "not " unless !tainted($c->{a}) && tainted($c->{b}); 758 print "ok 153\n"; 759 760 my $d = { a => $a, 761 b => 42 }; 762 print "not " unless tainted($d->{a}) && !tainted($d->{b}); 763 print "ok 154\n"; 764 765 my $e = { a => 42, 766 b => { c => $a, d => 42 } }; 767 print "not " unless !tainted($e->{a}) && 768 !tainted($e->{b}) && 769 tainted($e->{b}->{c}) && 770 !tainted($e->{b}->{d}); 771 print "ok 155\n"; 772 773 close IN; 774} 775 776{ 777 # bug id 20010519.003 778 779 BEGIN { 780 use vars qw($has_fcntl); 781 eval { require Fcntl; import Fcntl; }; 782 unless ($@) { 783 $has_fcntl = 1; 784 } 785 } 786 787 unless ($has_fcntl) { 788 for (156..173) { 789 print "ok $_ # Skip: no Fcntl (no dynaloading?)\n"; 790 } 791 } else { 792 my $evil = "foo" . $TAINT; 793 794 eval { sysopen(my $ro, $evil, &O_RDONLY) }; 795 test 156, $@ !~ /^Insecure dependency/, $@; 796 797 eval { sysopen(my $wo, $evil, &O_WRONLY) }; 798 test 157, $@ =~ /^Insecure dependency/, $@; 799 800 eval { sysopen(my $rw, $evil, &O_RDWR) }; 801 test 158, $@ =~ /^Insecure dependency/, $@; 802 803 eval { sysopen(my $ap, $evil, &O_APPEND) }; 804 test 159, $@ =~ /^Insecure dependency/, $@; 805 806 eval { sysopen(my $cr, $evil, &O_CREAT) }; 807 test 160, $@ =~ /^Insecure dependency/, $@; 808 809 eval { sysopen(my $tr, $evil, &O_TRUNC) }; 810 test 161, $@ =~ /^Insecure dependency/, $@; 811 812 eval { sysopen(my $ro, "foo", &O_RDONLY | $evil) }; 813 test 162, $@ !~ /^Insecure dependency/, $@; 814 815 eval { sysopen(my $wo, "foo", &O_WRONLY | $evil) }; 816 test 163, $@ =~ /^Insecure dependency/, $@; 817 818 eval { sysopen(my $rw, "foo", &O_RDWR | $evil) }; 819 test 164, $@ =~ /^Insecure dependency/, $@; 820 821 eval { sysopen(my $ap, "foo", &O_APPEND | $evil) }; 822 test 165, $@ =~ /^Insecure dependency/, $@; 823 824 eval { sysopen(my $cr, "foo", &O_CREAT | $evil) }; 825 test 166, $@ =~ /^Insecure dependency/, $@; 826 827 eval { sysopen(my $tr, "foo", &O_TRUNC | $evil) }; 828 test 167, $@ =~ /^Insecure dependency/, $@; 829 830 eval { sysopen(my $ro, "foo", &O_RDONLY, $evil) }; 831 test 168, $@ !~ /^Insecure dependency/, $@; 832 833 eval { sysopen(my $wo, "foo", &O_WRONLY, $evil) }; 834 test 169, $@ =~ /^Insecure dependency/, $@; 835 836 eval { sysopen(my $rw, "foo", &O_RDWR, $evil) }; 837 test 170, $@ =~ /^Insecure dependency/, $@; 838 839 eval { sysopen(my $ap, "foo", &O_APPEND, $evil) }; 840 test 171, $@ =~ /^Insecure dependency/, $@; 841 842 eval { sysopen(my $cr, "foo", &O_CREAT, $evil) }; 843 test 172, $@ =~ /^Insecure dependency/, $@; 844 845 eval { sysopen(my $tr, "foo", &O_TRUNC, $evil) }; 846 test 173, $@ =~ /^Insecure dependency/, $@; 847 848 unlink("foo"); # not unlink($evil), because that would fail... 849 } 850} 851 852{ 853 # bug 20010526.004 854 855 use warnings; 856 857 local $SIG{__WARN__} = sub { print "not " }; 858 859 sub fmi { 860 my $divnum = shift()/1; 861 sprintf("%1.1f\n", $divnum); 862 } 863 864 fmi(21 . $TAINT); 865 fmi(37); 866 fmi(248); 867 868 print "ok 174\n"; 869} 870 871 872{ 873 # Bug ID 20010730.010 874 875 my $i = 0; 876 877 sub Tie::TIESCALAR { 878 my $class = shift; 879 my $arg = shift; 880 881 bless \$arg => $class; 882 } 883 884 sub Tie::FETCH { 885 $i ++; 886 ${$_ [0]} 887 } 888 889 890 package main; 891 892 my $bar = "The Big Bright Green Pleasure Machine"; 893 taint_these $bar; 894 tie my ($foo), Tie => $bar; 895 896 my $baz = $foo; 897 898 print $i == 1 ? "ok 175\n" : "not ok 175\n" 899 900} 901 902{ 903 # Check that all environment variables are tainted. 904 my @untainted; 905 while (my ($k, $v) = each %ENV) { 906 if (!tainted($v) && 907 # These we have explicitly untainted or set earlier. 908 $k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|PERL_CORE|TEMP|TERM|TMP)$/) { 909 push @untainted, "# '$k' = '$v'\n"; 910 } 911 } 912 print @untainted == 0 ? "ok 176\n" : "not ok 176\n"; 913 print "# untainted:\n", @untainted if @untainted; 914} 915 916 917ok( ${^TAINT} == 1, '$^TAINT is on' ); 918 919eval { ${^TAINT} = 0 }; 920ok( ${^TAINT}, '$^TAINT is not assignable' ); 921ok( $@ =~ /^Modification of a read-only value attempted/, 922 'Assigning to ${^TAINT} fails' ); 923 924{ 925 # bug 20011111.105 926 927 my $re1 = qr/x$TAINT/; 928 test 180, tainted $re1; 929 930 my $re2 = qr/^$re1\z/; 931 test 181, tainted $re2; 932 933 my $re3 = "$re2"; 934 test 182, tainted $re3; 935} 936 937if ($Is_MSWin32) { 938 print "ok 183 # Skipped: system {} has different semantics\n"; 939} 940else 941{ 942 # bug 20010221.005 943 local $ENV{PATH} .= $TAINT; 944 eval { system { "echo" } "/arg0", "arg1" }; 945 test 183, $@ =~ /^Insecure \$ENV/; 946} 947if ($Is_VMS) { 948 for (184..205) {print "not ok $_ # TODO tainted %ENV warning occludes tainted arguments warning\n";} 949} 950else 951{ 952 # bug 20020208.005 plus some extras 953 # single arg exec/system are tests 80-83 954 my $err = qr/^Insecure dependency/ ; 955 test 184, eval { exec $TAINT, $TAINT } eq '', 'exec'; 956 test 185, $@ =~ $err, $@; 957 test 186, eval { exec $TAINT $TAINT } eq '', 'exec'; 958 test 187, $@ =~ $err, $@; 959 test 188, eval { exec $TAINT $TAINT, $TAINT } eq '', 'exec'; 960 test 189, $@ =~ $err, $@; 961 test 190, eval { exec $TAINT 'notaint' } eq '', 'exec'; 962 test 191, $@ =~ $err, $@; 963 test 192, eval { exec {'notaint'} $TAINT } eq '', 'exec'; 964 test 193, $@ =~ $err, $@; 965 966 test 194, eval { system $TAINT, $TAINT } eq '', 'system'; 967 test 195, $@ =~ $err, $@; 968 test 196, eval { system $TAINT $TAINT } eq '', 'system'; 969 test 197, $@ =~ $err, $@; 970 test 198, eval { system $TAINT $TAINT, $TAINT } eq '', 'system'; 971 test 199, $@ =~ $err, $@; 972 test 200, eval { system $TAINT 'notaint' } eq '', 'system'; 973 test 201, $@ =~ $err, $@; 974 test 202, eval { system {'notaint'} $TAINT } eq '', 'system'; 975 test 203, $@ =~ $err, $@; 976 977 eval { system("lskdfj does not exist","with","args"); }; 978 test 204, $@ eq ''; 979 if ($Is_MacOS) { 980 print "ok 205 # no exec()\n"; 981 } else { 982 eval { exec("lskdfj does not exist","with","args"); }; 983 test 205, $@ eq ''; 984 } 985 986 # If you add tests here update also the above skip block for VMS. 987} 988 989{ 990 # [ID 20020704.001] taint propagation failure 991 use re 'taint'; 992 $TAINT =~ /(.*)/; 993 test 206, tainted(my $foo = $1); 994} 995 996{ 997 # Remove this when changes 21542 and 21563 are integrated 998 test 207, 1; 999 test 208, 1; 1000} 1001 1002{ 1003 # [perl #24248] 1004 $TAINT =~ /(.*)/; 1005 test 209, !tainted($1); 1006 my $notaint = $1; 1007 test 210, !tainted($notaint); 1008 1009 my $l; 1010 $notaint =~ /($notaint)/; 1011 $l = $1; 1012 test 211, !tainted($1); 1013 test 212, !tainted($l); 1014 $notaint =~ /($TAINT)/; 1015 $l = $1; 1016 test 213, tainted($1); 1017 test 214, tainted($l); 1018 1019 $TAINT =~ /($notaint)/; 1020 $l = $1; 1021 test 215, !tainted($1); 1022 test 216, !tainted($l); 1023 $TAINT =~ /($TAINT)/; 1024 $l = $1; 1025 test 217, tainted($1); 1026 test 218, tainted($l); 1027 1028 my $r; 1029 ($r = $TAINT) =~ /($notaint)/; 1030 test 219, !tainted($1); 1031 ($r = $TAINT) =~ /($TAINT)/; 1032 test 220, tainted($1); 1033 1034 # [perl #24674] 1035 # accessing $^O shoudn't taint it as a side-effect; 1036 # assigning tainted data to it is now an error 1037 1038 test 221, !tainted($^O); 1039 if (!$^X) { } elsif ($^O eq 'bar') { } 1040 test 222, !tainted($^O); 1041 eval '$^O = $^X'; 1042 test 223, $@ =~ /Insecure dependency in/; 1043} 1044