pdfalto
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heap-buffer-overflow found?
sample here: heap-bufferoverflow-pos-)%at pdfalto.zip
Describe info:
$ ./pdfalto heap-bufferoverflow-pos-\>at\ pdfalto.cc\:190\:5
==43072==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6040000000f1 at pc 0x00000043f92b bp 0x7fff65e8f0f0 sp 0x7fff65e8e8a0
WRITE of size 33 at 0x6040000000f1 thread T0
#0 0x43f92a in strncat /home/bupt/Desktop/tools/llvm-12.0.1/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cpp:397
#1 0x503603 in main /home/bupt/Desktop/pdfalto/src/pdfalto.cc:190:5
#2 0x7f8cfec7dc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#3 0x422ca9 in _start (/home/bupt/Desktop/pdfalto/build/pdfalto+0x422ca9)
0x6040000000f1 is located 0 bytes to the right of 33-byte region [0x6040000000d0,0x6040000000f1)
allocated by thread T0 here:
#0 0x4b5270 in malloc /home/bupt//tools/llvm-12.0.1/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145
#1 0x5035f1 in main /home/bupt/Desktop/pdfalto/src/pdfalto.cc:189:22
#2 0x7f8cfec7dc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/bupt//tools/llvm-12.0.1/llvm/projects/compiler-rt/lib/asan/asan_interceptors.cpp:397 in strncat
Shadow bytes around the buggy address:
0x0c087fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c087fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c087fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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 fd fa fa 00 00 00 00 00 04
=>0x0c087fff8010: fa fa 00 00 00 00 00 01 fa fa 00 00 00 00[01]fa
0x0c087fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c087fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c087fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
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
==43072==ABORTING