Description:
mp3gain is a program to analyze and adjust MP3 files to same volume.
The fuzz was done via the aacgain command-line tool which uses mp3gain which bundles an old-modified version of mpg123 called mpglibDBL.
The upstream project seems to be dead, so the issue wasn’t communicated to them.
The complete ASan output of the issue:
# aacgain -f $FILE
ASAN:DEADLYSIGNAL
=================================================================
==15053==ERROR: AddressSanitizer: SEGV on unknown address 0x104db559357d (pc 0x7f06b1457af7 bp 0x7ffed0c702a0 sp 0x7ffed0c6fa30 T0)
#0 0x7f06b1457af6 (/usr/lib/gcc/x86_64-pc-linux-gnu/6.4.0/libasan.so.3+0x5caf6)
#1 0x8a8ad0 in copy_mp /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/interface.c:188
#2 0x8ad77e in decodeMP3 /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/interface.c:538
#3 0x43e767 in main /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mp3gain.c:2262
#4 0x7f06b0770680 in __libc_start_main (/lib64/libc.so.6+0x20680)
#5 0x4426c8 in _start (/usr/bin/aacgain+0x4426c8)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/lib/gcc/x86_64-pc-linux-gnu/6.4.0/libasan.so.3+0x5caf6)
==15053==ABORTING
Affected version:
1.5.2
Fixed version:
N/A
Commit fix:
N/A
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2017-14412
Reproducer:
https://github.com/asarubbo/poc/blob/master/00352-aacgain-invalidwrite-copy_mp
Timeline:
2017-08-28: bug discovered
2017-09-08: blog post about the issue
2017-09-13: CVE Assigned
Note:
This bug was found with American Fuzzy Lop.
This bug was identified with bare metal servers donated by Packet. This work is also supported by the Core Infrastructure Initiative.
Permalink:
mp3gain: invalid memory write in copy_mp (mpglibDBL/interface.c)