Hi,
I found global-buffer-overflow in get_line at read.c:1528
Please run following command to reproduce it,
fig2dev -L box $PoC
Here's log
==23137==ERROR: AddressSanitizer: global-buffer-overflow on address 0x556239047e7f at pc 0x556238c69e36 bp 0x7ffefbf4bc40 sp 0x7ffefbf4bc30 READ of size 1 at 0x556239047e7f thread T0 #1 0x556238c5e9fb in read_objects fig2dev-3.2.7b/fig2dev/read.c:278 #2 0x556238c5e1d3 in readfp_fig fig2dev-3.2.7b/fig2dev/read.c:172 #3 0x556238c5e0a9 in read_fig fig2dev-3.2.7b/fig2dev/read.c:142 #4 0x556238c55ef3 in main fig2dev-3.2.7b/fig2dev/fig2dev.c:422 #5 0x7f9d44bf4b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96) #6 0x556238c46979 in _start (fig2dev-3.2.7b+0x6e979) 0x556239047e7f is located 59 bytes to the right of global variable 'gif_colnum' defined in 'read.c:80:13' (0x556239047e40) of size 4 0x556239047e7f is located 1 bytes to the left of global variable 'buf' defined in 'read.c:81:14' (0x556239047e80) of size 8192 Shadow bytes around the buggy address: 0x0aacc7200f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200fb0: 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 =>0x0aacc7200fc0: 00 00 00 00 00 00 00 00 04 f9 f9 f9 f9 f9 f9[f9] 0x0aacc7200fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7200ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7201000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0aacc7201010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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 ==23137==ABORTING
fig2dev Version 3.2.7b
I also tested this in git master and can reproduce it.
Log is incomplete, it's my mistake
Fixed with commit [41b9bb].
Related
Commit: [41b9bb]