heap-buffer-overflow libyara/exec.c:1426 in yr_execute_code

[shinibufa]

Describe the bug AddressSanitizer: heap-buffer-overflow libyara/exec.c:1426 in yr_execute_code

To Reproduce Steps to reproduce the behavior: 1, compile yara with asan: ./configure CC=gcc CXX=g++ CFLAGS="-g -O0 -fsanitize=address" CXXFLAGS="-g -O0 -fsanitize=address" LDFLAGS="-g -O0 -fsanitize=address" 2, run this command: ./yara -C PoC binFile

Please complete the following information:

• OS: ubuntu 20.04
• YARA version: 4.3.2

Additional context ASAN reprot:

==1855158==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x604000000248 at pc 0x7f168933dfaf bp 0x7ffd229d5530 sp 0x7ffd229d5520 READ of size 8 at 0x604000000248 thread T0

0 0x7f168933dfae in yr_execute_code libyara/exec.c:1426

#1 0x7f16893a1cd8 in yr_scanner_scan_mem_blocks libyara/scanner.c:526
#2 0x7f16893a27a0 in yr_scanner_scan_mem libyara/scanner.c:670
#3 0x7f16893a2b3e in yr_scanner_scan_fd libyara/scanner.c:706
#4 0x55aa2e6ed11a in scan_file cli/yara.c:736
#5 0x55aa2e6f1444 in main cli/yara.c:1654
#6 0x7f1688c22082 in __libc_start_main ../csu/libc-start.c:308
#7 0x55aa2e6e9ced in _start (/home/root/latestFiles/yara-4.3.2/.libs/yara+0x7ced)

0x604000000248 is located 8 bytes to the left of 48-byte region [0x604000000250,0x604000000280) allocated by thread T0 here:

0 0x7f1689535a06 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:153

#1 0x7f168936db41 in yr_calloc libyara/mem.c:127
#2 0x7f168939fe48 in yr_scanner_create libyara/scanner.c:242
#3 0x55aa2e6f12af in main cli/yara.c:1640
#4 0x7f1688c22082 in __libc_start_main ../csu/libc-start.c:308

SUMMARY: AddressSanitizer: heap-buffer-overflow libyara/exec.c:1426 in yr_execute_code Shadow bytes around the buggy address: 0x0c087fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c087fff8000: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa 0x0c087fff8010: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa 0x0c087fff8020: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa 0x0c087fff8030: fa fa fd fd fd fd fd fa fa fa 00 00 00 00 00 fa =>0x0c087fff8040: fa fa 00 00 00 00 00 00 fa[fa]00 00 00 00 00 00 0x0c087fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c087fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c087fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c087fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c087fff8090: 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 ==1855158==ABORTING

[plusvic]

Closing as this is crash is the result of fuzzing compiled rules. See #1948 for more context.