Product Link
https://github.com/caryll/otfcc
POC file
Command to reproduce
./otfccbuild --pretty [sample file] -o /dev/null
Product name & version
last github commit code : 617837b
Problem Type
heap-buffer-overflow
Crash Detail
==107115==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60e00000037b at pc 0x0000006e420e bp 0x7ffcd59ed9f0 sp 0x7ffcd59ed9e8
WRITE of size 1 at 0x60e00000037b thread T0
#0 0x6e420d (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6e420d)
#1 0x59ab0f (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x59ab0f)
#2 0x4fbe96 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fbe96)
#3 0x4f5932 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5932)
#4 0x7f3dd47a6c86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#5 0x41c549 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x41c549)
0x60e00000037b is located 0 bytes to the right of 155-byte region [0x60e0000002e0,0x60e00000037b)
allocated by thread T0 here:
#0 0x4aecd8 in calloc (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4aecd8)
#1 0x6e3519 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6e3519)
#2 0x59ab0f (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x59ab0f)
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6e420d)
Shadow bytes around the buggy address:
0x0c1c7fff8010: fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa fa
0x0c1c7fff8020: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x0c1c7fff8030: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
0x0c1c7fff8040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c1c7fff8050: 00 00 00 02 fa fa fa fa fa fa fa fa 00 00 00 00
=>0x0c1c7fff8060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00[03]
0x0c1c7fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c1c7fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c1c7fff8090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c1c7fff80a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c1c7fff80b0: 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
Shadow gap: cc
==107115==ABORTING
Crash summary
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6e420d)