CVE-2022-38860: #2402 (A Division by zero occurred in function demux_open_avi() of libmpdemux/demux_avi.c) – MPlayer

#2402 closed defect (duplicate)

Reported by:

Owned by:

beastd

Priority:

normal

Component:

undetermined

Version:

HEAD

Severity:

major

Keywords:

Cc:

Blocked By:

Blocking:

Reproduced by developer:

no

Analyzed by developer:

no

Version: SVN-r38374-13.0.1

Build command: …/configure --disable-ffmpeg_a && make (compiling with asan)

Summary of the bug: An division by zero is found in fucnction demux_open_avi () which affects mencoder and mplayer. The attached file can reproduce this issue (ASAN-recompilation is needed).

How to reproduce:

1.Command: ./mencoder -ovc lavc -oac lavc -o /dev/null ./testcase

./mplayer ./testcase

2.Result:

MPlayer SVN-r38374-9 © 2000-2022 MPlayer Team

Playing /home/jlx/crashes/id^%000056,sig^%08,src^%001688,time^%14273883,execs^%697532,op^%havoc,rep^%2. libavformat version 58.29.100 (external) AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 1 AVI: No audio stream found -> no sound.

MPlayer interrupted by signal 8 in module: demux_open

• MPlayer crashed by bad usage of CPU/FPU/RAM. Recompile MPlayer with --enable-debug and make a ‘gdb’ backtrace and disassembly. Details in DOCS/HTML/en/bugreports_what.html#bugreports_crash.
• MPlayer crashed. This shouldn’t happen. It can be a bug in the MPlayer code _or_ in your drivers _or_ in your gcc version. If you think it’s MPlayer’s fault, please read DOCS/HTML/en/bugreports.html and follow the instructions there. We can’t and won’t help unless you provide this information when reporting a possible bug.

MEncoder SVN-r38374-13.0.1 © 2000-2022 MPlayer Team success: format: 0 data: 0x0 - 0x2ab4 libavformat version 58.29.100 (external) AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 1 AVI: No audio stream found -> no sound. AddressSanitizer:DEADLYSIGNAL ================================================================= ==19160==ERROR: AddressSanitizer: FPE on unknown address 0x55eacc77d2e7 (pc 0x55eacc77d2e7 bp 0x000000000004 sp 0x7ffce604b120 T0) #0 0x55eacc77d2e7 in demux_open_avi /home/jlx/good_mplayer/mplayer/libmpdemux/demux_avi.c:571:42 #1 0x55eacc77d2e7 in demux_open_hack_avi /home/jlx/good_mplayer/mplayer/libmpdemux/demux_avi.c:885:14

AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: FPE /home/jlx/good_mplayer/mplayer/libmpdemux/demux_avi.c:571:42 in demux_open_avi ==19160==ABORTING

Breakpoint 3, demux_open_avi (demuxer=<optimized out>) at libmpdemux/demux_avi.c:571 571 asamples+=(len+priv->audio_block_size-1)/priv->audio_block_size; LEGEND: STACK | HEAP | CODE | DATA | RWX | RODATA ───────────────────────────────────────────────────────────────────────[ REGISTERS ]──────────────────────────────────────────────────────────────────────── RAX 0x4 RBX 0x55904d5f8d00 —▸ 0x55904d5f9410 ◂— 0xe1e1e1e1e1e1 RCX 0x2fb RDX 0x4 RDI 0x0 RSI 0x55904d5f9440 ◂— 0x1062773130 R8 0x1 R9 0x0 R10 0x55904d5f9470 ◂— 0x0 R11 0x0 R12 0x55904d5f73b0 —▸ 0x55904bcf5ec0 (demuxer_desc_avi) —▸ 0x55904bccffcc ◂— ‘AVI demuxer’ R13 0x55904d5f8c60 ◂— 0x0 R14 0x55904d5f8d80 —▸ 0x55904d593400 ◂— 0x2fb00000000 R15 0x0 RBP 0x4 RSP 0x7fff5a391720 —▸ 0x55904d593400 ◂— 0x2fb00000000 RIP 0x55904bb55aa7 (demux_open_hack_avi+1351) ◂— lea eax, [rax + r9 - 1] ─────────────────────────────────────────────────────────────────────────[ DISASM ]───────────────────────────────────────────────────────────────────────── ► 0x55904bb55aa7 <demux_open_hack_avi+1351> lea eax, [rax + r9 - 1] 0x55904bb55aac <demux_open_hack_avi+1356> xor edx, edx 0x55904bb55aae <demux_open_hack_avi+1358> div r9d ↓ 0x55904bb55aae <demux_open_hack_avi+1358> div r9d

─────────────────────────────────────────────────────────────────────[ SOURCE (CODE) ]────────────────────────────────────────────────────────────────────── In file: /home/jlx/good_mplayer/mplayer/libmpdemux/demux_avi.c 566 vsize+=len; 567 ++vsamples; 568 } 569 else if(d_audio->id == id) { 570 asize+=len; ► 571 asamples+=(len+priv->audio_block_size-1)/priv->audio_block_size; 572 } 573 } 574 mp_msg(MSGT_DEMUX, MSGL_V, 575 “AVI video size=%"PRId64” (%zu) audio size=%"PRId64" (%zu)\n", 576 vsize, vsamples, asize, asamples); ─────────────────────────────────────────────────────────────────────────[ STACK ]────────────────────────────────────────────────────────────────────────── 00:0000│ rsp 0x7fff5a391720 —▸ 0x55904d593400 ◂— 0x2fb00000000 01:0008│ 0x7fff5a391728 —▸ 0x55904d5f9430 ◂— 0x1062773130 02:0010│ 0x7fff5a391730 —▸ 0x55904d5f8c60 ◂— 0x0 03:0018│ 0x7fff5a391738 ◂— 0xffffffff 04:0020│ 0x7fff5a391740 ◂— 0x62773130ffffffff 05:0028│ 0x7fff5a391748 ◂— 0x588a634aec56d900 06:0030│ 0x7fff5a391750 ◂— 0xffffffff 07:0038│ 0x7fff5a391758 —▸ 0x55904bcf5ec0 (demuxer_desc_avi) —▸ 0x55904bccffcc ◂— ‘AVI demuxer’ ───────────────────────────────────────────────────────────────────────[ BACKTRACE ]──────────────────────────────────────────────────────────────────────── ► f 0 55904bb55aa7 demux_open_hack_avi+1351 f 1 55904bb55aa7 demux_open_hack_avi+1351 f 2 55904bb48743 demux_open_stream+931 f 3 55904bb49231 demux_open+753 f 4 55904bac0642 main+1042 f 5 7f7b8118c0b3 __libc_start_main+243 ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────