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
==101583==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6100000000f3 at pc 0x0000006b0479 bp 0x7ffcfed95d00 sp 0x7ffcfed95cf8
READ of size 1 at 0x6100000000f3 thread T0
#0 0x6b0478 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b0478)
#1 0x6b99ca (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b99ca)
#2 0x527687 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x527687)
#3 0x4fe3fe (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
#4 0x4f5710 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
#5 0x7f173ed37c86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#6 0x41c549 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x41c549)
0x6100000000f3 is located 0 bytes to the right of 179-byte region [0x610000000040,0x6100000000f3)
allocated by thread T0 here:
#0 0x4aecd8 in calloc (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4aecd8)
#1 0x6b536b (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b536b)
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b0478)
Shadow bytes around the buggy address:
0x0c207fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c207fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c207fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c207fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c207fff8000: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
=>0x0c207fff8010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[03]fa
0x0c207fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c207fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c207fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c207fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c207fff8060: 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
==101583==ABORTING
Crash summary
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b0478)