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dev version, git clone https://github.com/brackeen/ok-file-formats.git
#include <stdio.h> #include "ok_csv.h" int main(int _argc, char **_argv) { FILE *file = fopen(_argv[1], "rb"); ok_csv *image = ok_csv_read(file); fclose(file); ok_csv_free(image); return 0; }
$ gcc -o csv_decode csv_decode.c ok_csv.h ok_csv.c
➜ ok-file-formats git:(master) ✗ ./csv_decode-asan ./csv_out/2018-12-31-heap-buffer-overflow.csv ================================================================= ==83695==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000eff1 at pc 0x00000040e0ae bp 0x7fff4ea94bc0 sp 0x7fff4ea94bb0 WRITE of size 1 at 0x60200000eff1 thread T0 #0 0x40e0ad in ok_csv_decode2 /home/moonagirl/megic_afl/ok-file-formats/ok_csv.c:448 #1 0x411baf in ok_csv_decode /home/moonagirl/megic_afl/ok-file-formats/ok_csv.c:241 #2 0x411baf in ok_csv_read /home/moonagirl/megic_afl/ok-file-formats/ok_csv.c:177 #3 0x400d7a in main /home/moonagirl/megic_afl/ok-file-formats/csv_decode.c:6 #4 0x7f33246cd82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f) #5 0x400e88 in _start (/home/moonagirl/megic_afl/ok-file-formats/csv_decode-asan+0x400e88) 0x60200000eff1 is located 0 bytes to the right of 1-byte region [0x60200000eff0,0x60200000eff1) allocated by thread T0 here: #0 0x7f3324b0f602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602) #1 0x403e82 in ok_csv_decode2 /home/moonagirl/megic_afl/ok-file-formats/ok_csv.c:422 SUMMARY: AddressSanitizer: heap-buffer-overflow /home/moonagirl/megic_afl/ok-file-formats/ok_csv.c:448 ok_csv_decode2 Shadow bytes around the buggy address: 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 fa fa =>0x0c047fff9df0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa[01]fa 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 0x0c047fff9e40: 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 ==83695==ABORTING
https://github.com/moonAgirl/Bugs/blob/master/ok-file-formats/2018-12-31-02-heap-buffer-overflow.csv
The text was updated successfully, but these errors were encountered:
ok_csv: Fix issues found by fuzzer
f7c7483
Fixes #5
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Test Version
dev version, git clone https://github.com/brackeen/ok-file-formats.git
Test Program
$ gcc -o csv_decode csv_decode.c ok_csv.h ok_csv.c
Asan Debug Information
POC file
https://github.com/moonAgirl/Bugs/blob/master/ok-file-formats/2018-12-31-02-heap-buffer-overflow.csv
The text was updated successfully, but these errors were encountered: