heap-buffer-overflow in ecma_string_copy_to_cesu8_buffer

[mka-sec]

Revision

1088273

Build

./tools/build.py --clean --debug --compile-flag=-fsanitize=address
--compile-flag=-m32 --compile-flag=-fno-omit-frame-pointer
--compile-flag=-fno-common --compile-flag=-g
--strip=off --system-allocator=on --logging=on
--error-messages=on --profile=es2015-subset

OS

Linux 4.15.0-58-generic #64-Ubuntu x86_64 GNU/Linux

Test case

var str = "123" + "test123";
str.repeat([1073741823]);

Backtrace

Run with jerry poc.js

=================================================================
==88915==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xf54ff7f6 at pc 0xf799690e bp 0xffbbcda8 sp 0xffbbc978
WRITE of size 10 at 0xf54ff7f6 thread T0
    #0 0xf799690d  (/usr/lib32/libasan.so.4+0x7790d)
    #1 0x56717127 in ecma_string_copy_to_cesu8_buffer /jerryscript/jerry-core/ecma/base/ecma-helpers-string.c:1040
    #2 0x56643eb5 in ecma_builtin_string_prototype_object_repeat /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c:1924
    #3 0x566447be in ecma_builtin_string_prototype_dispatch_routine /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c:2146
    #4 0x566dc3a6 in ecma_builtin_dispatch_routine /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1025
    #5 0x566dc607 in ecma_builtin_dispatch_call /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1050
    #6 0x566ee96b in ecma_op_function_call /jerryscript/jerry-core/ecma/operations/ecma-function-object.c:729
    #7 0x566a36b4 in opfunc_call /jerryscript/jerry-core/vm/vm.c:581
    #8 0x566b48e7 in vm_execute /jerryscript/jerry-core/vm/vm.c:3622
    #9 0x566b51eb in vm_run /jerryscript/jerry-core/vm/vm.c:3742
    #10 0x566a294b in vm_run_global /jerryscript/jerry-core/vm/vm.c:282
    #11 0x566fc63b in jerry_run /jerryscript/jerry-core/api/jerry.c:570
    #12 0x566f8f9f in main /jerryscript/jerry-main/main-unix.c:743
    #13 0xf775ee80 in __libc_start_main (/lib32/libc.so.6+0x18e80)
    #14 0x56626610  (/home/xyz/jerryscript/tmpmaster/build/bin/jerry+0x16610)

0xf54ff7f6 is located 0 bytes to the right of 2147483638-byte region [0x754ff800,0xf54ff7f6)
allocated by thread T0 here:
    #0 0xf7a04f34 in malloc (/usr/lib32/libasan.so.4+0xe5f34)
    #1 0x566d1bd8 in jmem_heap_alloc /jerryscript/jerry-core/jmem/jmem-heap.c:258
    #2 0x566d1cb6 in jmem_heap_gc_and_alloc_block /jerryscript/jerry-core/jmem/jmem-heap.c:293
    #3 0x566d1d48 in jmem_heap_alloc_block /jerryscript/jerry-core/jmem/jmem-heap.c:327
    #4 0x56643e83 in ecma_builtin_string_prototype_object_repeat /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c:1918
    #5 0x566447be in ecma_builtin_string_prototype_dispatch_routine /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c:2146
    #6 0x566dc3a6 in ecma_builtin_dispatch_routine /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1025
    #7 0x566dc607 in ecma_builtin_dispatch_call /jerryscript/jerry-core/ecma/builtin-objects/ecma-builtins.c:1050
    #8 0x566ee96b in ecma_op_function_call /jerryscript/jerry-core/ecma/operations/ecma-function-object.c:729
    #9 0x566a36b4 in opfunc_call /jerryscript/jerry-core/vm/vm.c:581
    #10 0x566b48e7 in vm_execute /jerryscript/jerry-core/vm/vm.c:3622
    #11 0x566b51eb in vm_run /jerryscript/jerry-core/vm/vm.c:3742
    #12 0x566a294b in vm_run_global /jerryscript/jerry-core/vm/vm.c:282
    #13 0x566fc63b in jerry_run /jerryscript/jerry-core/api/jerry.c:570
    #14 0x566f8f9f in main /jerryscript/jerry-main/main-unix.c:743
    #15 0xf775ee80 in __libc_start_main (/lib32/libc.so.6+0x18e80)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/usr/lib32/libasan.so.4+0x7790d) 
Shadow bytes around the buggy address:
  0x3ea9fea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3ea9feb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3ea9fec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3ea9fed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x3ea9fee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x3ea9fef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[06]fa
  0x3ea9ff00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ea9ff10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ea9ff20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ea9ff30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x3ea9ff40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==88915==ABORTING