Source: https://code.google.com/p/google-security-research/issues/detail?id=645
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"):
Attached are three files which trigger the crash.--- cut ---
==5117==ERROR: AddressSanitizer: heap-use-after-free on address 0x61b00001e3b2 at pc 0x000000499bad bp 0x7ffd2111f650 sp 0x7ffd2111ee00
READ of size 4 at 0x61b00001e3b2 thread T0
#0 0x499bac in memcmp llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:416#1 0x37949bc in addresses_equal wireshark/epan/dissectors/./../address.h:140:26#2 0x379389a in rsvp_equal wireshark/epan/dissectors/packet-rsvp.c:1886:13#3 0x7f77e4ae95ef in g_hash_table_lookup (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x385ef)#4 0x3796e2d in dissect_rsvp_common wireshark/epan/dissectors/packet-rsvp.c:7531:37#5 0x37930d4 in dissect_rsvp wireshark/epan/dissectors/packet-rsvp.c:7553:5#6 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8#7 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9#8 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9#9 0x29c5318 in ip_try_dissect wireshark/epan/dissectors/packet-ip.c:2001:7#10 0x29d0521 in dissect_ip_v4 wireshark/epan/dissectors/packet-ip.c:2485:10#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 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9#14 0xae5a38 in dissector_try_uint wireshark/epan/packet.c:1174:9#15 0x24e0824 in dissect_ethertype wireshark/epan/dissectors/packet-ethertype.c:307:21#16 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8#17 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9#18 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8#19 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8#20 0x24dc752 in dissect_eth_common wireshark/epan/dissectors/packet-eth.c:545:5#21 0x24d499a in dissect_eth_maybefcs wireshark/epan/dissectors/packet-eth.c:828:5#22 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8#23 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9#24 0xae4e1d in dissector_try_uint_new wireshark/epan/packet.c:1148:9#25 0x25dca12 in dissect_frame wireshark/epan/dissectors/packet-frame.c:500:11#26 0xaf3794 in call_dissector_through_handle wireshark/epan/packet.c:616:8#27 0xae5692 in call_dissector_work wireshark/epan/packet.c:691:9#28 0xaefb1b in call_dissector_only wireshark/epan/packet.c:2662:8#29 0xae09f3 in call_dissector_with_data wireshark/epan/packet.c:2675:8#30 0xadffde in dissect_record wireshark/epan/packet.c:501:3#31 0xab6d0d in epan_dissect_run_with_taps wireshark/epan/epan.c:373:2#32 0x53c91b in process_packet wireshark/tshark.c:3728:5#33 0x535d90 in load_cap_file wireshark/tshark.c:3484:11#34 0x52c1df in main wireshark/tshark.c:2197:13
0x61b00001e3b2 is located 50 bytes inside of 1500-byte region [0x61b00001e380,0x61b00001e95c)
freed by thread T0 here:
#0 0x4d7380 in realloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:61#1 0x7f77e4aff6ae in g_realloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e6ae)#2 0x9d71b7 in wtap_read_packet_bytes wireshark/wiretap/wtap.c:1419:2#3 0x89ee21 in libpcap_read_packet wireshark/wiretap/libpcap.c:722:7#4 0x8991f4 in libpcap_read wireshark/wiretap/libpcap.c:619:9#5 0x9d64c2 in wtap_read wireshark/wiretap/wtap.c:1314:7#6 0x535c1a in load_cap_file wireshark/tshark.c:3479:12#7 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 0x7f77e4aff610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610)#2 0x83fff6 in wtap_open_offline wireshark/wiretap/file_access.c:1105:2#3 0x53214d in cf_open wireshark/tshark.c:4195:9#4 0x52bc7e in main wireshark/tshark.c:2188:9
SUMMARY: AddressSanitizer: heap-use-after-free llvm/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:416 in memcmp
Shadow bytes around the buggy address:
0x0c367fffbc20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c367fffbc60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c367fffbc70: fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd fd fd
0x0c367fffbc80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbc90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbca0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbcb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c367fffbcc0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
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
==5117==ABORTING
--- cut ---
The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11793. Attached are three files which trigger the crash.
Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39002.zip
