Wireshark – print_hex_data_buffer / print_packet Use-After-Free
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"): --- cut --- ==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 --- cut --- 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 |