Source: https://code.google.com/p/google-security-research/issues/detail?id=651
The following crash due to a use-after-free condition 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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==14146==ERROR: AddressSanitizer: heap-use-after-free on address 0x6070000003a0 at pc 0x000000b2c8eb bp 0x7ffdfc45fa70 sp 0x7ffdfc45fa68
READ of size 1 at 0x6070000003a0 thread T0
#0 0xb2c8ea in print_hex_data_buffer wireshark/epan/print.c:987:13
#1 0xb2bf43 in print_hex_data wireshark/epan/print.c:904:14
#2 0x5422e2 in print_packet wireshark/tshark.c:4155:10
#3 0x53cb2e in process_packet wireshark/tshark.c:3742:7
#4 0x535d90 in load_cap_file wireshark/tshark.c:3484:11
#5 0x52c1df in main wireshark/tshark.c:2197:13
0x6070000003a0 is located 0 bytes inside of 65-byte region [0x6070000003a0,0x6070000003e1)
freed by thread T0 here:
#0 0x4d6ce0 in free llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:30
#1 0xc1fd8e in real_free wireshark/epan/tvbuff_real.c:47:3
#2 0xc2229c in tvb_free_internal wireshark/epan/tvbuff.c:110:3
#3 0xc22049 in tvb_free_chain wireshark/epan/tvbuff.c:135:3
#4 0xc21ed1 in tvb_free wireshark/epan/tvbuff.c:125:2
#5 0xbc972e in free_all_fragments wireshark/epan/reassemble.c:351:4
#6 0xbd40e5 in fragment_add_seq_common wireshark/epan/reassemble.c:1919:5
#7 0xbd4895 in fragment_add_seq_check_work wireshark/epan/reassemble.c:2006:12
#8 0xbd43a7 in fragment_add_seq_check wireshark/epan/reassemble.c:2050:9
#9 0x2fb8256 in dissect_mux27010 wireshark/epan/dissectors/packet-mux27010.c:949:28
#10 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#11 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#12 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#13 0x25dca12 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11
#14 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#15 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#16 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#17 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#18 0xadffde in dissect_record wireshark/epan/packet.c:501:3
#19 0xab6d0d in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2
#20 0x53c91b in process_packet wireshark/tshark.c:3728:5
#21 0x535d90 in load_cap_file wireshark/tshark.c:3484:11
#22 0x52c1df in main wireshark/tshark.c:2197:13
previously allocated by thread T0 here:
#0 0x4d6ff8 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
#1 0x7ff6062f0610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610)
#2 0xbe1202 in fragment_add_seq_work wireshark/epan/reassemble.c:1793:2
#3 0xbd4181 in fragment_add_seq_common wireshark/epan/reassemble.c:1925:6
#4 0xbd4895 in fragment_add_seq_check_work wireshark/epan/reassemble.c:2006:12
#5 0xbd43a7 in fragment_add_seq_check wireshark/epan/reassemble.c:2050:9
#6 0x2fb8256 in dissect_mux27010 wireshark/epan/dissectors/packet-mux27010.c:949:28
#7 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#8 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#9 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9
#10 0x25dca12 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11
#11 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8
#12 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9
#13 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8
#14 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8
#15 0xadffde in dissect_record wireshark/epan/packet.c:501:3
#16 0xab6d0d in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2
#17 0x53c91b in process_packet wireshark/tshark.c:3728:5
#18 0x535d90 in load_cap_file wireshark/tshark.c:3484:11
#19 0x52c1df in main wireshark/tshark.c:2197:13
SUMMARY: AddressSanitizer: heap-use-after-free wireshark/epan/print.c:987:13 in print_hex_data_buffer
Shadow bytes around the buggy address:
0x0c0e7fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0e7fff8040: fa fa fa fa fa fa fa fa fa fa fd fd fd fd fd fd
0x0c0e7fff8050: fd fd fd fd fa fa fa fa fd fd fd fd fd fd fd fd
0x0c0e7fff8060: fd fd fa fa fa fa fd fd fd fd fd fd fd fd fd fd
=>0x0c0e7fff8070: fa fa fa fa[fd]fd fd fd fd fd fd fd fd fa fa fa
0x0c0e7fff8080: fa fa fd fd fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0e7fff8090: 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fd fd
0x0c0e7fff80a0: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0e7fff80b0: fd fd fd fd fd fa fa fa fa fa 00 00 00 00 00 00
0x0c0e7fff80c0: 00 00 06 fa fa fa fa fa 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
Left alloca redzone: ca
Right alloca redzone: cb
==14146==ABORTING
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The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11799. Attached are three files which trigger the crash.
Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39503.zip
