bugPSPP - Bugs: bug #62977, heap-buffer-overflow in...

 
 

bug #62977: heap-buffer-overflow in read_bytes_internal, different from CVE-2018-20230

Submitter:  None
Submitted:  Mon 29 Aug 2022 12:30:22 PM UTC
   
 
Category:  None Severity:  5 - Average
Status:  Fixed Assigned to:  None
Open/Closed:  Closed Release:  None
Effort:  0.00
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Mon 05 Sep 2022 05:11:09 PM UTC, comment #1: 

I fixed it, by preventing the program from being installed: https://git.savannah.gnu.org/cgit/pspp.git/commit/?id=8596d6eb21e40ffaf9321d1cb779333de3126b50. Maybe people will fuzz things that are worthwhile now rather than a program that no one uses.

 Ben Pfaff <blp>
Group administrator
Mon 29 Aug 2022 12:30:22 PM UTC, original submission:  

## short summary

Hello, I was testing my fuzzer and find a heap buffer overflow in read_bytes_internal, pspp-1.6.2, which is different from  CVE-2018-20230. (The poc of CVE-2018-20230 cannot be reproduced in this version)

## Environment
Ubuntu 21.10
gcc 11.2.0
pspp-1.6.2

## step to reproduce
./configure --disable-shared --without-gui && make -j$(nproc)

./pspp-dump-sav $POC

## ASan output

=================================================================
==3455132==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000f71 at pc 0x000000499f5e bp 0x7fff77164110 sp 0x7fff771638d8
WRITE of size 5 at 0x602000000f71 thread T0
    #0 0x499f5d in fread /home/kdsj/workspace/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:1029:16
    #1 0x41fc97 in read_bytes_internal (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x41fc97)
    #2 0x41fb79 in read_bytes (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x41fb79)
    #3 0x42621b in read_string (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x42621b)
    #4 0x4237ce in read_character_encoding (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x4237ce)
    #5 0x41d7b9 in read_extension_record (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x41d7b9)
    #6 0x417ac0 in main (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x417ac0)
    #7 0x7f8cc1e41fcf in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
    #8 0x7f8cc1e4207c in __libc_start_main csu/../csu/libc-start.c:409:3
    #9 0x407444 in _start (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x407444)

0x602000000f71 is located 0 bytes to the right of 1-byte region [0x602000000f70,0x602000000f71)
allocated by thread T0 here:
    #0 0x4fd792 in calloc /home/kdsj/workspace/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
    #1 0x42fabb in xcalloc (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x42fabb)
    #2 0x4237b5 in read_character_encoding (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x4237b5)
    #3 0x41d7b9 in read_extension_record (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x41d7b9)
    #4 0x417ac0 in main (/home/kdsj/workspace/fuzz/libpspp/pspp-dump-sav/pspp-dump-sav+0x417ac0)
    #5 0x7f8cc1e41fcf in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/kdsj/workspace/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:1029:16 in fread
Shadow bytes around the buggy address:
  0x0c047fff8190: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 fa
  0x0c047fff81a0: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fa
  0x0c047fff81b0: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fa
  0x0c047fff81c0: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fa
  0x0c047fff81d0: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fa
=>0x0c047fff81e0: fa fa fd fa fa fa fd fa fa fa fd fa fa fa[01]fa
  0x0c047fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8210: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8220: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8230: 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
==3455132==ABORTING

## Credit
Han Zheng(NCNIPC of China, Hexhive)

Anonymous

 

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Attach Files:
   
   
Comment:
   

Attached Files
file #53626:  poc0.zip added by kdsj (653B - application/x-zip-compressed - poc)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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  • -email is unavailable- added by blp (Posted a comment)
  • -email is unavailable- added by kdsj (Updated the item)

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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2022-09-05 blp StatusNone Fixed
        Open/ClosedOpen Closed
    2022-08-29 kdsj Attached File- Added poc0.zip, #53626

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