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 ==13869==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fa590d1b958 at pc 0x0000008b2341 bp 0x7ffc23c02b70 sp 0x7ffc23c02b68 READ of size 8 at 0x7fa590d1b958 thread T0 #0 0x8b2340 in dct36 /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/layer3.c:1279 #1 0x8d26e6 in III_hybrid /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/layer3.c:1504 #2 0x8d26e6 in do_layer3 /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/layer3.c:1695 #3 0x8ac2f9 in decodeMP3 /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mpglibDBL/interface.c:643 #4 0x43e767 in main /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mp3gain.c:2262 #5 0x7fa5937b1680 in __libc_start_main (/lib64/libc.so.6+0x20680) #6 0x4426c8 in _start (/usr/bin/aacgain+0x4426c8) Address 0x7fa590d1b958 is located in stack of thread T0 at offset 18776 in frame #0 0x4341ff in main /var/tmp/portage/media-sound/aacgain-1.9/work/aacgain-1.9/mp3gain/mp3gain.c:1411 This frame has 7 object(s): [32, 33) 'maxgain' [96, 97) 'mingain' [160, 164) 'nprocsamp' [224, 232) 'maxsample' [288, 9504) 'lsamples' [9536, 18752) 'rsamples' [18784, 50704) 'mp' 0x0ff53219b720: 00 00 00 00 00 00 00 00 f2 f2 f2[f2]00 00 00 00 0x0ff53219b730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff53219b740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff53219b750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff53219b760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff53219b770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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 Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 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 ==13869==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-2017-14408
Reproducer:
https://github.com/asarubbo/poc/blob/master/00351-aacgain-stackoverflow-dct36
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: stack-based buffer overflow in dct36 (mpglibDBL/layer3.c)