Source: https://code.google.com/p/google-security-research/issues/detail?id=653 The following SIGSEGV crash due to an invalid memory write 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 --- ==31799==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000fff3 (pc 0x7f538efe2e98 bp 0x7ffff1414290 sp 0x7ffff1413a18 T0) #0 0x7f538efe2e97 /build/buildd/eglibc-2.19/string/../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:1812 #1 0x4aaeac in __asan_memcpy llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:393 #2 0x7f53989ebdee in get_value wireshark/epan/dissectors/packet-btatt.c:6021:9 #3 0x7f53989cd2a1 in dissect_btatt wireshark/epan/dissectors/packet-btatt.c:6434:40 #4 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #5 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #6 0x7f539840ddbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9 #7 0x7f5398abde89 in dissect_btl2cap wireshark/epan/dissectors/packet-btl2cap.c:2217:26 #8 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #9 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #10 0x7f53984182be in call_dissector_only wireshark/epan/packet.c:2662:8 #11 0x7f5398409ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8 #12 0x7f5398add99f in dissect_btle wireshark/epan/dissectors/packet-btle.c:760:21 #13 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #14 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #15 0x7f53984182be in call_dissector_only wireshark/epan/packet.c:2662:8 #16 0x7f5398409ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8 #17 0x7f5398ae089b in dissect_btle_rf wireshark/epan/dissectors/packet-btle_rf.c:221:27 #18 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #19 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #20 0x7f539840ddbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9 #21 0x7f53989467c5 in dissect_bluetooth wireshark/epan/dissectors/packet-bluetooth.c:1748:10 #22 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #23 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #24 0x7f539840ddbd in dissector_try_uint_new wireshark/epan/packet.c:1148:9 #25 0x7f539911d5f6 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11 #26 0x7f539841bcc1 in call_dissector_through_handle wireshark/epan/packet.c:616:8 #27 0x7f539840e5ea in call_dissector_work wireshark/epan/packet.c:691:9 #28 0x7f53984182be in call_dissector_only wireshark/epan/packet.c:2662:8 #29 0x7f5398409ccf in call_dissector_with_data wireshark/epan/packet.c:2675:8 #30 0x7f539840933b in dissect_record wireshark/epan/packet.c:501:3 #31 0x7f53983b73c9 in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2 #32 0x5264eb in process_packet wireshark/tshark.c:3728:5 #33 0x51f960 in load_cap_file wireshark/tshark.c:3484:11 #34 0x515daf in main wireshark/tshark.c:2197:13 AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /build/buildd/eglibc-2.19/string/../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:1812 ==31799==ABORTING --- cut --- The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11817. Attached are two files which trigger the crash. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38998.zip