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dev version, git clone https://github.com/brackeen/ok-file-formats.git
#include <stdio.h> #include "ok_mo.h" int main(int _argc, char **_argv) { FILE *file = fopen(_argv[1], "rb"); ok_mo *image = ok_mo_read(file); fclose(file); ok_mo_free(image); return 0; }
$ gcc -o mo_decode mo_decode.c ok_mo.h ok_mo.c
➜ ok-file-formats git:(master) ✗ ./mo_decode-asan ./mo_out/03-heap-buffer-overflow.mo ================================================================= ==31120==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000ef71 at pc 0x0000004058ae bp 0x7ffc8b9cb940 sp 0x7ffc8b9cb930 READ of size 1 at 0x60200000ef71 thread T0 #0 0x4058ad in ok_mo_decode2 /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:301 #1 0x4058ad in ok_mo_decode /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:96 #2 0x4058ad in ok_mo_read /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:145 #3 0x401074 in main /home/moonagirl/megic_afl/ok-file-formats/mo_decode.c:6 #4 0x7f526eb0c82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f) #5 0x4011c8 in _start (/home/moonagirl/megic_afl/ok-file-formats/mo_decode-asan+0x4011c8) 0x60200000ef71 is located 0 bytes to the right of 1-byte region [0x60200000ef70,0x60200000ef71) allocated by thread T0 here: #0 0x7f526ef4e602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602) #1 0x40511b in ok_mo_decode2 /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:285 #2 0x40511b in ok_mo_decode /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:96 #3 0x40511b in ok_mo_read /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:145 SUMMARY: AddressSanitizer: heap-buffer-overflow /home/moonagirl/megic_afl/ok-file-formats/ok_mo.c:301 ok_mo_decode2 Shadow bytes around the buggy address: 0x0c047fff9d90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c047fff9de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa[01]fa 0x0c047fff9df0: fa fa 00 fa fa fa 01 fa fa fa 00 00 fa fa 00 00 0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff9e30: 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 Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 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 ==31120==ABORTING
https://github.com/moonAgirl/Bugs/blob/master/ok-file-formats/2018-12-31-03-heap-buffer-overflow.mo
The text was updated successfully, but these errors were encountered:
ok_mo: Fix issues found by fuzzer
7a9fe75
Fixes #6
No branches or pull requests
Test Version
dev version, git clone https://github.com/brackeen/ok-file-formats.git
Test Program
$ gcc -o mo_decode mo_decode.c ok_mo.h ok_mo.c
Asan Debug Information
POC file
https://github.com/moonAgirl/Bugs/blob/master/ok-file-formats/2018-12-31-03-heap-buffer-overflow.mo
The text was updated successfully, but these errors were encountered: