Wireshark – ‘infer_pkt_encap’ Heap Out-of-Bounds Read
Source: https://code.google.com/p/google-security-research/issues/detail?id=658 The following crash due to a heap-based out-of-bounds read 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 --- ==6473==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61b00001335c at pc 0x7f391e585d1e bp 0x7ffc0ff625c0 sp 0x7ffc0ff625b8 READ of size 1 at 0x61b00001335c thread T0 #0 0x7f391e585d1d in infer_pkt_encap wireshark/wiretap/ngsniffer.c:1767:27 #1 0x7f391e582ac7 in fix_pseudo_header wireshark/wiretap/ngsniffer.c:1805:11 #2 0x7f391e57d07e in ngsniffer_process_record wireshark/wiretap/ngsniffer.c:1299:20 #3 0x7f391e576418 in ngsniffer_read wireshark/wiretap/ngsniffer.c:1034:9 #4 0x7f391e62429b in wtap_read wireshark/wiretap/wtap.c:1309:7 #5 0x51f7ea in load_cap_file wireshark/tshark.c:3479:12 #6 0x515daf in main wireshark/tshark.c:2197:13 0x61b00001335c is located 0 bytes to the right of 1500-byte region [0x61b000012d80,0x61b00001335c) allocated by thread T0 here: #0 0x4c0bc8 in malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40 #1 0x7f390a251610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610) #2 0x7f391e48d0e5 in wtap_open_offline wireshark/wiretap/file_access.c:1105:2 #3 0x51bd1d in cf_open wireshark/tshark.c:4195:9 #4 0x51584e in main wireshark/tshark.c:2188:9 SUMMARY: AddressSanitizer: heap-buffer-overflow wireshark/wiretap/ngsniffer.c:1767:27 in infer_pkt_encap Shadow bytes around the buggy address: 0x0c367fffa610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c367fffa660: 00 00 00 00 00 00 00 00 00 00 00[04]fa fa fa fa 0x0c367fffa670: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffa680: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c367fffa690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa6a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fffa6b0: 00 00 00 00 00 00 00 00 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 ==6473==ABORTING --- cut --- The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11827. Attached are two files which trigger the crash. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39076.zip |