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
==108759==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x612000000616 at pc 0x0000006b064e bp 0x7ffe8ca033c0 sp 0x7ffe8ca033b8
READ of size 1 at 0x612000000616 thread T0
#0 0x6b064d (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b064d)
#1 0x6b256a (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b256a)
#2 0x6b74c0 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b74c0)
#3 0x5265aa (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x5265aa)
#4 0x4fe3fe (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
#5 0x4f5710 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
#6 0x7f93b614bc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#7 0x41c549 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x41c549)
0x612000000616 is located 75 bytes to the right of 267-byte region [0x6120000004c0,0x6120000005cb)
allocated by thread T0 here:
#0 0x4aecd8 in calloc (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4aecd8)
#1 0x6b69c5 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b69c5)
#2 0x4fe3fe (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4fe3fe)
#3 0x4f5710 (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x4f5710)
#4 0x7f93b614bc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b064d)
Shadow bytes around the buggy address:
0x0c247fff8070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c247fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa fa
0x0c247fff8090: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff80a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c247fff80b0: 00 00 00 00 00 00 00 00 00 03 fa fa fa fa fa fa
=>0x0c247fff80c0: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff80f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff8100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff8110: 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
==108759==ABORTING
Crash summary
SUMMARY: AddressSanitizer: heap-buffer-overflow (/home/bupt/Desktop/otfcc/bin/release-x64/otfccdump+0x6b064d)