Opened 2 years ago

Closed 2 years ago

#2406 closed defect (fixed)

A heap-buffer-overflow occurred in function mp_unescape03() of libmpdemux/mpeg_hdr.c

Reported by: ylzs Owned by: beastd
Priority: normal Component: undetermined
Version: HEAD Severity: major
Keywords: Cc:
Blocked By: Blocking:
Reproduced by developer: no Analyzed by developer: no

Description (last modified by ylzs)

Version: SVN-r38374-13.0.1

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

Summary of the bug: An heap-buffer-overflow is found in fucnction in mp_unescape03() 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-r38374-13.0.1 (C) 2000-2022 MPlayer Team

Playing /home/jlx/crashes/id^%000298,sig^%06,src^%003761,time^%206364090,execs^%10623748,op^%havoc,rep^%8.
libavformat version 58.29.100 (external)
MPEG-PS file format detected.
MPEG: No audio stream found -> no sound.
=================================================================
==22224==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000002d91 at pc 0x555555d38dcd bp 0x7fffffffc4a0 sp 0x7fffffffc498                                                                                                                                                                               WRITE of size 1 at 0x602000002d91 thread T0
    #0 0x555555d38dcc in mp_unescape03 /home/jlx/good_mplayer/mplayer/libmpdemux/mpeg_hdr.c:394:13
    #1 0x555555d38dcc in h264_parse_sps /home/jlx/good_mplayer/mplayer/libmpdemux/mpeg_hdr.c:406:9

0x602000002d91 is located 0 bytes to the right of 1-byte region [0x602000002d90,0x602000002d91)                                                                                                                                                                                                                         allocated by thread T0 here:
    #0 0x5555558971cd in malloc (/home/jlx/good_mplayer/asan_mplayer/mplayer+0x3431cd)
    #1 0x555555d34e40 in h264_parse_sps /home/jlx/good_mplayer/mplayer/libmpdemux/mpeg_hdr.c:404:18                                                                                                                                                                                                                     
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/jlx/good_mplayer/mplayer/libmpdemux/mpeg_hdr.c:394:13 in mp_unescape03                                                                                                                                                                                            Shadow bytes around the buggy address:
  0x0c047fff8560: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00
  0x0c047fff8570: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00
  0x0c047fff8580: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00
  0x0c047fff8590: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa 00 00
  0x0c047fff85a0: fa fa 00 00 fa fa 00 00 fa fa 06 fa fa fa fd fd
=>0x0c047fff85b0: fa fa[01]fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff85c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff85d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff85e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff85f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff8600: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
==22224==ABORTING

Attachments (1)

testcase​ (11.3 KB ) - added by ylzs 2 years ago.

Download all attachments as: .zip

Change History (3)

by ylzs, 2 years ago

Attachment: testcase​ added

comment:1 by ylzs, 2 years ago

Description: modified (diff)

comment:2 by reimar, 2 years ago

Resolution: → fixed
Status: new → closed

Fixed by r38391, but sample shows further issues.

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