Description:
autotrace is a program for converting bitmaps to vector graphics.
If compiled with Address Sanitizer, it shows that ANY bmp image causes an out-of-bounds write.
The complete ASan output:
# autotrace $FILE
==31756==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61700000ff20 at pc 0x7f11a5538380 bp 0x7ffecc970f90 sp 0x7ffecc970f88
WRITE of size 8 at 0x61700000ff20 thread T0
#0 0x7f11a553837f in pstoedit_suffix_table_init /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/output-pstoedit.c:103:54
#1 0x7f11a5536544 in pstoedit_suffix_table_lookup_shallow /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/output-pstoedit.c:143:5
#2 0x7f11a5536544 in output_pstoedit_is_writer /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/output-pstoedit.c:160
#3 0x7f11a556020b in at_splines_write /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/autotrace.c:375:7
#4 0x4f579b in main /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/main.c:161:3
#5 0x7f11a460761f in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289
#6 0x4196b8 in _init (/usr/bin/autotrace+0x4196b8)
0x61700000ff21 is located 0 bytes to the right of 673-byte region [0x61700000fc80,0x61700000ff21)
allocated by thread T0 here:
#0 0x4c0c08 in malloc /var/tmp/portage/sys-devel/llvm-3.8.1/work/llvm-3.8.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:52
#1 0x7f11a5538053 in pstoedit_suffix_table_init /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/output-pstoedit.c:87:7
SUMMARY: AddressSanitizer: heap-buffer-overflow /var/tmp/portage/media-gfx/autotrace-0.31.1-r7/work/autotrace-0.31.1/output-pstoedit.c:103:54 in pstoedit_suffix_table_init
Shadow bytes around the buggy address:
0x0c2e7fff9f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c2e7fff9fe0: 00 00 00 00[01]fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fff9ff0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa030: 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
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
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
==31756==ABORTING
Affected version:
0.31.1
Fixed version:
N/A
Commit fix:
N/A
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2016-7392
Timeline:
2016-09-10: bug discovered
2016-09-10: bug reported to upstream
2016-09-10: blog post about the issue
2016-09-10: CVE assigned
Note:
This bug was found with Address Sanitizer.
Permalink:
autotrace: heap-based buffer overflow in pstoedit_suffix_table_init (output-pstoedit.c)