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Date: Fri, 7 Dec 2018 22:16:59 -0500
From: Ren Kimura <rkx1209dev@...il.com>
To: oss-security@...ts.openwall.com
Subject: mpg321: Out-of-bounds Write
Hi.
mpg321 is a free command-line mp3 player that is commonly available on
many Linux distributions.
For example, in ubuntu you can download the latest mpg321 by "apt-get
install mpg321."
latest mpg321 0.3.2, in scan() in mad.c calculate the number of frames
using bit rate.
If crafted mp3 whose bit rate equal 0 is taken, sampling time become
INF value due to floating point division by 0.
As a result, the frame number become a very large (1<<63), leading out
of bounds write, memory corruption at mad.c:285.
note. frames buffer have been allocated only 8-byte at mpg321.c:990.
I'll request a CVE ID from MITRE.
ASAN crash traces:
Playing MPEG stream from mpg321_0.3.2_memory_corruption.mp3 ...
=================================================================
==18648==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6020000000d8 at pc 0x555555566c18 bp 0x7fffffffb3$
0 sp 0x7fffffffb3c0
WRITE of size 8 at 0x6020000000d8 thread T0
#0 0x555555566c17 in read_header
/home/rkx/Programming/OSS/research/results/2/mpg321-0.3.2/mad.c:285
#1 0x7ffff64c0594 (/usr/lib/x86_64-linux-gnu/libmad.so.0+0x5594)
#2 0x7ffff64c0b82 in mad_decoder_run
(/usr/lib/x86_64-linux-gnu/libmad.so.0+0x5b82)
#3 0x5555555607fb in main
/home/rkx/Programming/OSS/research/results/2/mpg321-0.3.2/mpg321.c:1092
#4 0x7ffff5b43b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
#5 0x555555562779 in _start
(/home/rkx/Programming/OSS/research/results/2/mpg321-0.3.2/mpg321-asan+0xe779)
0x6020000000d8 is located 0 bytes to
0x6020000000d8 is located 0 bytes to the right of 8-byte region
[0x6020000000d0,0x6020000000d8)
allocated by thread T0 here:
#0 0x7ffff6ef8b50 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
#1 0x555555561b51 in main
/home/rkx/Programming/OSS/research/results/2/mpg321-0.3.2/mpg321.c:990
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/rkx/Programming/OSS/research/results/2/mpg321-0.3.2/mad.c:285 in
read_header
Shadow bytes around the buggy address:
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff8000: fa fa 06 fa fa fa 06 fa fa fa 01 fa fa fa 00 00
=>0x0c047fff8010: fa fa 00 00 fa fa 06 fa fa fa 00[fa]fa fa 00 00
0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8060: 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
Ren Kimura
Download attachment "mpg321_0.3.2_memory_corruption.mp3" of type "audio/mp3" (4317 bytes)
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