Problem:
stack buffer underflow vulnerbility in function ec_read_file_func().
Tested Version:
extract v1.6
System Information:
Ubuntu 16.04.4 LTS \n \l
Details:
Function ec_read_file_func(unzip.c) can cause stack overflow vulnerbility while extracting a malformed file.
address@hidden:~/Desktop$extract crash-19b19795b4eb9a0b31689ba9bf2c08d4c2de0621
Keywords for file crash-19b19795b4eb9a0b31689ba9bf2c08d4c2de0621:
mimetype - audio/ogg
audio preview - (binary, 2249 bytes)
duration - 0:00:01.348299320
mimetype - audio/ogg
mimetype - audio/x-vorbis
created by software - REAPER
comment - index=0
encoder - Xiph.Org libVorbis I 20101101 (Schaufenugget)
encoder version - 0
audio codec - Vorbis
container format - Ogg
channels - 2
sample rate - 44100
audio depth - 32
audio bitrate - 112000
*** stack smashing detected ***: extract terminated
the details reported by ASan:
=================================================================
==350==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7ffce3dbb2e0 at pc 0x000000436b36 bp 0x7ffce3dba980 sp 0x7ffce3dba120
WRITE of size 1028 at 0x7ffce3dbb2e0 thread T0
#0 0x436b35 in memcpy /tmp/final/llvm.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:779:5
#1 0x7fafc629a39a in memcpy /usr/x86_64-linux-gnu/include/bits/string_fortified.h:34
#2 0x7fafc629a39a in ec_read_file_func /media/septem/S1TB/fuzz_targets/libextractor_backup/src/common/unzip.c:1353
#3 0x7fafc629a53f in locate_central_directory /media/septem/S1TB/fuzz_targets/libextractor_backup/src/common/unzip.c:492
#4 0x7fafc629a53f in unzip_open_using_ffd.constprop.1 /media/septem/S1TB/fuzz_targets/libextractor_backup/src/common/unzip.c:740
#5 0x7fafc629b2c3 in EXTRACTOR_common_unzip_open /media/septem/S1TB/fuzz_targets/libextractor_backup/src/common/unzip.c:1413
#6 0x7fafc662dc2a in EXTRACTOR_odf_extract_method /media/septem/S1TB/fuzz_targets/libextractor_backup/src/plugins/odf_extractor.c:167
#7 0x4fcf37 in handle_start_message /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor_plugin_main.c:480:3
#8 0x4fcf37 in process_requests /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor_plugin_main.c:531
#9 0x4fcf37 in EXTRACTOR_plugin_main_ /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor_plugin_main.c:632
#10 0x4fb13d in EXTRACTOR_IPC_channel_create_ /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor_ipc_gnu.c:355:7
#11 0x4f0e18 in EXTRACTOR_extract /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor.c:659:17
#12 0x4eda22 in LLVMFuzzerTestOneInput /media/septem/S1TB/fuzz_targets/fuzz_libextractor.cpp:6:2
#13 0x508b94 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerLoop.cpp:451:13
#14 0x508dc1 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long) /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerLoop.cpp:408:3
#15 0x50976c in fuzzer::Fuzzer::MutateAndTestOne() /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerLoop.cpp:587:30
#16 0x5099d7 in fuzzer::Fuzzer::Loop() /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerLoop.cpp:615:5
#17 0x502314 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerDriver.cpp:644:6
#18 0x4feda0 in main /media/septem/S1TB/libfuzzer-workshop/libFuzzer/Fuzzer/FuzzerMain.cpp:20:10
#19 0x7fafcc2f8b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
#20 0x41d6e9 in _start (/media/septem/S1TB/fuzz_targets/libextractor_fuzzer+0x41d6e9)
Address 0x7ffce3dbb2e0 is located in stack of thread T0 at offset 0 in frame
#0 0x4fc86f in EXTRACTOR_plugin_main_ /media/septem/S1TB/fuzz_targets/libextractor/src/main/extractor_plugin_main.c:601
This frame has 5 object(s):
[32, 48) 'start.i.i' (line 458) <== Memory access at offset 0 partially underflows this variable
[64, 112) 'ec.i.i' (line 459) <== Memory access at offset 0 partially underflows this variable
[144, 145) 'done.i.i' (line 460) <== Memory access at offset 0 partially underflows this variable
[160, 161) 'code.i' (line 514) <== Memory access at offset 0 partially underflows this variable
[176, 240) 'pc' (line 602) <== Memory access at offset 0 partially underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-underflow /tmp/final/llvm.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:779:5 in memcpy
Shadow bytes around the buggy address:
0x10001c7af600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10001c7af650: 00 00 00 00 00 00 00 00 00 00 00 00[f1]f1 f1 f1
0x10001c7af660: 00 00 f2 f2 00 00 00 00 00 00 f2 f2 f2 f2 01 f2
0x10001c7af670: 01 f2 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3
0x10001c7af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001c7af6a0: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2
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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
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
==350==ABORTING
CREDIT:
ADLab of Venustech
crash-19b19795b4eb9a0b31689ba9bf2c08d4c2de0621