global-buffer-overflow on reader.c:177:20

[shinibufa]

The command below may cause a global buffer overflow error when running catdoc

catdoc / /-v -wbawdd

Test Environment
Ubuntu 20.04, 64 bit catdoc (version: 0.95; )

How to trigger
Compile the program with AddressSanitizer
Run command $ catdoc / /-v -wbawdd
Details
ASAN report
$catdoc / /-v -wbawdd

=================================================================
==3560683==ERROR: AddressSanitizer: global-buffer-overflow on address 0x000000e5a820 at pc 0x0000004cfe18 bp 0x7fffffffde30 sp 0x7fffffffde28
WRITE of size 2 at 0x000000e5a820 thread T0
#0 0x4cfe17 in process_file /home/ned158/sp/Dataset/Catdoc/catdoc_aflpp/src/reader.c:177:20
#1 0x4d12a2 in analyze_format /home/ned158/sp/Dataset/Catdoc/catdoc_aflpp/src/analyze.c:38:10
#2 0x4cd221 in main /home/ned158/sp/Dataset/Catdoc/catdoc_aflpp/src/catdoc.c:180:6
#3 0x7ffff7c3b082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
#4 0x41d44d in _start (/home/ned158/sp/Dataset/Catdoc/catdoc_aflpp/install/bin/catdoc+0x41d44d)

0x000000e5a820 is located 0 bytes to the right of global variable 'buffer' defined in 'reader.c:13:20' (0xdda820) of size 524288
SUMMARY: AddressSanitizer: global-buffer-overflow /home/ned158/sp/Dataset/Catdoc/catdoc_aflpp/src/reader.c:177:20 in process_file
Shadow bytes around the buggy address:
0x0000801c34b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000801c34c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000801c34d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000801c34e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000801c34f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0000801c3500: 00 00 00 00[f9]f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000801c3510: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000801c3520: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000801c3530: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000801c3540: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x0000801c3550: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
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
==3560683==ABORTING