The following crash due to a heap-based buffer overflow 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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==5869==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61b00001e95c at pc 0x0000004c1386 bp 0x7fff8c82cbf0 sp 0x7fff8c82c3a0
WRITE of size 1425 at 0x61b00001e95c thread T0
    #0 0x4c1385 in __asan_memcpy llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:393
    #1 0x9c8ab0 in vwr_read_s2_s3_W_rec wireshark/wiretap/vwr.c:1614:5
    #2 0x9bc02a in vwr_process_rec_data wireshark/wiretap/vwr.c:2336:20
    #3 0x9babf2 in vwr_read wireshark/wiretap/vwr.c:653:10
    #4 0x9d64c2 in wtap_read wireshark/wiretap/wtap.c:1314:7
    #5 0x535c1a in load_cap_file wireshark/tshark.c:3479:12
    #6 0x52c1df in main wireshark/tshark.c:2197:13

0x61b00001e95c is located 0 bytes to the right of 1500-byte region [0x61b00001e380,0x61b00001e95c)
allocated by thread T0 here:
    #0 0x4d6ff8 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
    #1 0x7f1f907a8610 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-buffer-overflow llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:393 in __asan_memcpy
Shadow bytes around the buggy address:
  0x0c367fffbcd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbce0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbcf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbd10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c367fffbd20: 00 00 00 00 00 00 00 00 00 00 00[04]fa fa fa fa
  0x0c367fffbd30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c367fffbd40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c367fffbd50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbd60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c367fffbd70: 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
==5869==ABORTING
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The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11795. Attached are three files which trigger the crash.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse without a broadly available patch, then the bug report will automatically become visible to the public.
 

asan_heap-oob_4c1046_5664_3d4a7b57dbd0316586c188e5fa6840e0.pcap 285 KB Download

asan_heap-oob_4c1046_918_0b955ac22edadade61f954892787058e.pcap 72.7 KB Download

asan_heap-oob_4c1046_4971_813a6227da6c064abc05034af4185727.pcap 34.1 KB Download