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pts / sam2p

raster (bitmap) image converter with smart PDF and PostScript (EPS) output
http://pts.50.hu/sam2p/
GNU General Public License v2.0
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heap buffer overflow in input-bmp.ci:295 #57

Closed puppet-meteor closed 6 years ago

puppet-meteor commented 6 years ago

There is a heap buffer overflow in input-bmp.ci:295 at sam2p 0.49.4. A crafted input will lead to denial of service attack.

Steps to Reproduce:

./sam2p POC_6 EPS: /dev/null

POC File: https://github.com/puppet-meteor/sam2p_POC/blob/master/POC_6

Information from addresssanitizer:

This is sam2p 0.49.4.
Available Loaders: PS PDF JAI PNG JPEG TIFF PNM BMP GIF LBM XPM PCX TGA.
Available Appliers: XWD Meta Empty BMP PNG TIFF6 TIFF6-JAI JPEG-JAI JPEG PNM GIF89a+LZW XPM PSL1C PSL23+PDF PSL2+PDF-JAI P-TrOpBb.
=================================================================
==6905==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62500000a067 at pc 0x000000428048 bp 0x7ffffa4e3750 sp 0x7ffffa4e3740
WRITE of size 1 at 0x62500000a067 thread T0
    #0 0x428047 in ReadImage /home/puppet/target/sam2p-gdb/input-bmp.ci:295
    #1 0x428047 in bmp_load_image(_IO_FILE*) /home/puppet/target/sam2p-gdb/input-bmp.ci:206
    #2 0x42823c in in_bmp_reader /home/puppet/target/sam2p-gdb/in_bmp.cpp:23
    #3 0x478f1b in Image::load(Image::Loader::UFD*, SimBuffer::Flat const&, char const*) /home/puppet/target/sam2p-gdb/image.cpp:1427
    #4 0x403a96 in run_sam2p_engine(Files::FILEW&, Files::FILEW&, char const* const*, bool) /home/puppet/target/sam2p-gdb/sam2p_main.cpp:1024
    #5 0x40264f in main /home/puppet/target/sam2p-gdb/sam2p_main.cpp:1117
    #6 0x7f8719e4b82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #7 0x402f98 in _start (/usr/local/bin/sam2p+0x402f98)

0x62500000a067 is located 153 bytes to the left of 9180-byte region [0x62500000a100,0x62500000c4dc)
allocated by thread T0 here:
    #0 0x7f871a28d602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x41f2aa in emulate_cc_new /home/puppet/target/sam2p-gdb/c_lgcc.cpp:35
    #2 0x41f2aa in operator new[](unsigned long) /home/puppet/target/sam2p-gdb/c_lgcc.cpp:55
    #3 0x4279a2 in ReadImage /home/puppet/target/sam2p-gdb/input-bmp.ci:267
    #4 0x4279a2 in bmp_load_image(_IO_FILE*) /home/puppet/target/sam2p-gdb/input-bmp.ci:206
    #5 0x42823c in in_bmp_reader /home/puppet/target/sam2p-gdb/in_bmp.cpp:23
    #6 0x478f1b in Image::load(Image::Loader::UFD*, SimBuffer::Flat const&, char const*) /home/puppet/target/sam2p-gdb/image.cpp:1427
    #7 0x403a96 in run_sam2p_engine(Files::FILEW&, Files::FILEW&, char const* const*, bool) /home/puppet/target/sam2p-gdb/sam2p_main.cpp:1024
    #8 0x40264f in main /home/puppet/target/sam2p-gdb/sam2p_main.cpp:1117
    #9 0x7f8719e4b82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/puppet/target/sam2p-gdb/input-bmp.ci:295 ReadImage
Shadow bytes around the buggy address:
  0x0c4a7fff93b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a7fff93c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a7fff93d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a7fff93e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a7fff93f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c4a7fff9400: fa fa fa fa fa fa fa fa fa fa fa fa[fa]fa fa fa
  0x0c4a7fff9410: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a7fff9420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a7fff9430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a7fff9440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a7fff9450: 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
  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
==6905==ABORTING

found by puppet@zju.edu.cn from NESA Lab in Zhejiang University.

pts commented 6 years ago

Thank you for reporting this! I'm not able to reproduce this bug with the latest sam2p HEAD (d2656beef486c55b53ae0d7e395d6610cc8ee744), so I'm closing this issue now. Feel free to report more issues, but please check that you have d2656beef486c55b53ae0d7e395d6610cc8ee744 or later checked out.

$ ./sam2p.asan POC_6 EPS: /dev/null
This is sam2p 0.49.4.
Available Loaders: PS PDF JAI PNG JPEG TIFF PNM BMP GIF LBM XPM PCX TGA.
Available Appliers: XWD Meta Empty BMP PNG TIFF6 TIFF6-JAI JPEG-JAI JPEG PNM GIF89a+LZW XPM PSL1C PSL23+PDF PSL2+PDF-JAI P-TrOpBb.
sam2p: Notice: job: read InputFile: POC_6
sam2p: Notice: writeTTT: using template: l23ind1
sam2p: Notice: applyProfile: applied OutputRule #9 using applier PSL23+PDF
sam2p: Notice: job: written OutputFile: /dev/null
Success.