Exploit-DB #39812
Description: Wireshark - 'AirPDcapDecryptWPABroadcastKey' Heap Out-of-Bounds Read (2)
Type: dos
Platform: multiple
Date: 2016-05-13
Author: Google Security Research

Exploit:
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=740

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 ---
==8910==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61b00001335c at pc 0x[PII_REDACTED]a4 bp 0x7fffa0f13710 sp 0x7fffa0f12ec0
READ of size 16385 at 0x61b00001335c thread T0
    #0 0x4558a3 in memcpy llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:438
    #1 0x7f1d70c97b65 in g_memdup (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x65b65)
    #2 0x7f1d78b4c531 in AirPDcapDecryptWPABroadcastKey wireshark/epan/crypt/airpdcap.c:360:32
    #3 0x7f1d78b4ba8c in AirPDcapRsna4WHandshake wireshark/epan/crypt/airpdcap.c:1522:21
    #4 0x7f1d78b424f6 in AirPDcapScanForKeys wireshark/epan/crypt/airpdcap.c:602:13
    #5 0x7f1d78b40d28 in AirPDcapPacketProcess wireshark/epan/crypt/airpdcap.c:815:21
    #6 0x7f1d79a70590 in dissect_ieee80211_common wireshark/epan/dissectors/packet-ieee80211.c:17818:9
    #7 0x7f1d79a44406 in dissect_ieee80211 wireshark/epan/dissectors/packet-ieee80211.c:18426:10
    #8 0x7f1d7898a941 in call_dissector_through_handle wireshark/epan/packet.c:626:8
    #9 0x7f1d7897d0ca in call_dissector_work wireshark/epan/packet.c:701:9
    #10 0x7f1d7897c89d in dissector_try_uint_new wireshark/epan/packet.c:1160:9
    #11 0x7f1d796c1235 in dissect_frame wireshark/epan/dissectors/packet-frame.c:493:11
    #12 0x7f1d7898a941 in call_dissector_through_handle wireshark/epan/packet.c:626:8
    #13 0x7f1d7897d0ca in call_dissector_work wireshark/epan/packet.c:701:9
    #14 0x7f1d78986c0e in call_dissector_only wireshark/epan/packet.c:2674:8
    #15 0x7f1d7897839f in call_dissector_with_data wireshark/epan/packet.c:2687:8
    #16 0x7f1d789778c1 in dissect_record wireshark/epan/packet.c:509:3
    #17 0x7f1d7892ac99 in epan_dissect_run_with_taps wireshark/epan/epan.c:376:2
    #18 0x52eebb in process_packet wireshark/tshark.c:3748:5
    #19 0x5281ac in load_cap_file wireshark/tshark.c:3504:11
    #20 0x51e4bc in main wireshark/tshark.c:2213:13

0x61b00001335c is located 0 bytes to the right of 1500-byte region [0x61b000012d80,0x61b00001335c)
allocated by thread T0 here:
    #0 0x4c2098 in malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:40
    #1 0x7f1d70c80610 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x4e610)
    #2 0x7f1d8543f638 in wtap_open_offline wireshark/wiretap/file_access.c:1082:2
    #3 0x5244dd in cf_open wireshark/tshark.c:4215:9
    #4 0x51decd in main wireshark/tshark.c:2204:9

SUMMARY: AddressSanitizer: heap-buffer-overflow llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:438 in memcpy
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
==8910==ABORTING
--- cut ---

The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=12175. Attached are three files which trigger the crash.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39812.zip