$ ./main heap-buffer-overflow-2.jpg
double free or corruption (!prev)
Aborted
Information obtained by using ASAN:
$ ./Asanjpg heap-buffer-overflow-2.jpg
=================================================================
==3402==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x63000000024c at pc 0x5632c5205ffb bp 0x7ffc939581c0 sp 0x7ffc939581b0
WRITE of size 1 at 0x63000000024c thread T0
#0 0x5632c5205ffa in ok_jpg_convert_YCbCr_to_RGB /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:513#1 0x5632c5205ffa in ok_jpg_convert_data_unit_color /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:545#2 0x5632c5205ffa in ok_jpg_convert_data_unit /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:607#3 0x5632c5212c3d in ok_jpg_decode_scan /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1276#4 0x5632c5212c3d in ok_jpg_read_sos /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1742#5 0x5632c5212c3d in ok_jpg_decode2 /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1930#6 0x5632c5212c3d in ok_jpg_decode /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:2004#7 0x5632c52142dc in ok_jpg_read_with_allocator /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:268#8 0x5632c5214412 in ok_jpg_read /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:257#9 0x5632c52146b1 in main /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/main.c:10#10 0x7f0ab88adbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)#11 0x5632c5203499 in _start (/home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/Asanjpg+0x1499)
0x63000000024c is located 436 bytes to the left of 60000-byte region [0x630000000400,0x63000000ee60)
allocated by thread T0 here:
#0 0x7f0ab8d5bb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)#1 0x5632c52037e1 in ok_stdlib_alloc /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:55#2 0x5632c520ed69 in ok_jpg_read_sof /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1613#3 0x5632c520ed69 in ok_jpg_decode2 /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1910#4 0x5632c520ed69 in ok_jpg_decode /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:2004#5 0x5632c52142dc in ok_jpg_read_with_allocator /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:268#6 0x5632c5214412 in ok_jpg_read /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:257#7 0x5632c52146b1 in main /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/main.c:10#8 0x7f0ab88adbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:513 in ok_jpg_convert_YCbCr_to_RGB
Shadow bytes around the buggy address:
0x0c607fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c607fff8000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c607fff8040: fa fa fa fa fa fa fa fa fa[fa]fa fa fa fa fa fa
0x0c607fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c607fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c607fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==3402==ABORTING
Description
A heap-buffer-overflow was discovered in ok_file_formats. The issue is being triggered in function ok_jpg_convert_YCbCr_to_RGB() at ok_jpg.c:513
Version
dev version, git clone https://github.com/brackeen/ok-file-formats.git
Environment
Ubuntu 18.04, 64bit
Testcase
Command
Compile test program:
Compile test program with address sanitizer with this command:
Result
The result of running without ASAN:
$ ./main heap-buffer-overflow-2.jpg double free or corruption (!prev) AbortedInformation obtained by using ASAN:
$ ./Asanjpg heap-buffer-overflow-2.jpg ================================================================= ==3402==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x63000000024c at pc 0x5632c5205ffb bp 0x7ffc939581c0 sp 0x7ffc939581b0 WRITE of size 1 at 0x63000000024c thread T0 #0 0x5632c5205ffa in ok_jpg_convert_YCbCr_to_RGB /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:513 #1 0x5632c5205ffa in ok_jpg_convert_data_unit_color /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:545 #2 0x5632c5205ffa in ok_jpg_convert_data_unit /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:607 #3 0x5632c5212c3d in ok_jpg_decode_scan /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1276 #4 0x5632c5212c3d in ok_jpg_read_sos /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1742 #5 0x5632c5212c3d in ok_jpg_decode2 /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1930 #6 0x5632c5212c3d in ok_jpg_decode /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:2004 #7 0x5632c52142dc in ok_jpg_read_with_allocator /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:268 #8 0x5632c5214412 in ok_jpg_read /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:257 #9 0x5632c52146b1 in main /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/main.c:10 #10 0x7f0ab88adbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #11 0x5632c5203499 in _start (/home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/Asanjpg+0x1499) 0x63000000024c is located 436 bytes to the left of 60000-byte region [0x630000000400,0x63000000ee60) allocated by thread T0 here: #0 0x7f0ab8d5bb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40) #1 0x5632c52037e1 in ok_stdlib_alloc /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:55 #2 0x5632c520ed69 in ok_jpg_read_sof /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1613 #3 0x5632c520ed69 in ok_jpg_decode2 /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:1910 #4 0x5632c520ed69 in ok_jpg_decode /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:2004 #5 0x5632c52142dc in ok_jpg_read_with_allocator /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:268 #6 0x5632c5214412 in ok_jpg_read /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:257 #7 0x5632c52146b1 in main /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/main.c:10 #8 0x7f0ab88adbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) SUMMARY: AddressSanitizer: heap-buffer-overflow /home/nisl1/nisl8121/wjl/ok-file-formats/afl-test1/ok_jpg.c:513 in ok_jpg_convert_YCbCr_to_RGB Shadow bytes around the buggy address: 0x0c607fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c607fff8000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c607fff8040: fa fa fa fa fa fa fa fa fa[fa]fa fa fa fa fa fa 0x0c607fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c607fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c607fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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 ==3402==ABORTINGDescription
A heap-buffer-overflow was discovered in ok_file_formats. The issue is being triggered in function ok_jpg_convert_YCbCr_to_RGB() at ok_jpg.c:513
Poc
Poc file is this.
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