Wireshark - iseries_parse_packet Heap Based Buffer Overflow

Source: https://code.google.com/p/google-security-research/issues/detail?id=650
 
The following crash due to a heap-based buffer overflow can be observed in an ASAN build of Wireshark (current git master), by feeding a malformed file to tshark ("$ ./tshark -nVxr /path/to/file"):
 
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==9819==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000027b3c at pc 0x00000087416b bp 0x7fff95547770 sp 0x7fff95547768
WRITE of size 1 at 0x603000027b3c thread T0
    #0 0x87416a in iseries_parse_packet wireshark/wiretap/iseries.c:820:27
    #1 0x870589 in iseries_read wireshark/wiretap/iseries.c:382:10
    #2 0x9d64c2 in wtap_read wireshark/wiretap/wtap.c:1314:7
    #3 0x535c1a in load_cap_file wireshark/tshark.c:3479:12
    #4 0x52c1df in main wireshark/tshark.c:2197:13
 
0x603000027b3c is located 3 bytes to the right of 25-byte region [0x603000027b20,0x603000027b39)
allocated by thread T0 here:
    #0 0x4d6ff8 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
    #1 0x7ff6f1a34610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610)
    #2 0x870589 in iseries_read wireshark/wiretap/iseries.c:382:10
    #3 0x9d64c2 in wtap_read wireshark/wiretap/wtap.c:1314:7
    #4 0x535c1a in load_cap_file wireshark/tshark.c:3479:12
    #5 0x52c1df in main wireshark/tshark.c:2197:13
 
SUMMARY: AddressSanitizer: heap-buffer-overflow wireshark/wiretap/iseries.c:820:27 in iseries_parse_packet
Shadow bytes around the buggy address:
  0x0c067fffcf10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffcf20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffcf30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffcf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffcf50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c067fffcf60: fa fa fa fa 00 00 00[01]fa fa 00 00 00 00 fa fa
  0x0c067fffcf70: 00 00 00 00 fa fa 00 00 00 00 fa fa 00 00 00 00
  0x0c067fffcf80: fa fa 00 00 00 00 fa fa 00 00 00 00 fa fa 00 00
  0x0c067fffcf90: 00 00 fa fa 00 00 00 00 fa fa 00 00 00 00 fa fa
  0x0c067fffcfa0: 00 00 00 00 fa fa 00 00 00 00 fa fa 00 00 00 00
  0x0c067fffcfb0: fa fa 00 00 00 00 fa fa 00 00 00 00 fa fa 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
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==9819==ABORTING
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The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11798. Attached is a file which triggers the crash.
 
Proof of Concept:
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/38992.zip

#  0day.today [2018-03-01]  #