Source: libsndfile
Version: 1.0.27-2
Severity: important
Tags: upstream patch security
Forwarded: https://github.com/erikd/libsndfile/issues/233
Hi,
the following vulnerability was published for libsndfile.
CVE-2017-8363[0]:
| The flac_buffer_copy function in flac.c in libsndfile 1.0.28 allows
| remote attackers to cause a denial of service (heap-based buffer
| over-read and application crash) via a crafted audio file.
root@sid:~/libsndfile-1.0.27# ASAN_OPTIONS='detect_leaks=0'
./programs/sndfile-convert ~/poc/00266-libsndfile-heapoverflow-flac_buffer_copy
/tmp/out.wav
=================================================================
==19330==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x62100001dd10 at pc 0x55c421b34b75 bp 0x7ffe33908460 sp 0x7ffe33908458
READ of size 4 at 0x62100001dd10 thread T0
#0 0x55c421b34b74 in flac_buffer_copy /root/libsndfile-1.0.27/src/flac.c:263
#1 0x55c421b38a75 in flac_read_loop /root/libsndfile-1.0.27/src/flac.c:916
#2 0x55c421b38e26 in flac_read_flac2i /root/libsndfile-1.0.27/src/flac.c:962
#3 0x55c421b0ff8c in sf_readf_int /root/libsndfile-1.0.27/src/sndfile.c:1778
#4 0x55c421b04ec7 in sfe_copy_data_int
/root/libsndfile-1.0.27/programs/common.c:87
#5 0x55c421b04930 in main
/root/libsndfile-1.0.27/programs/sndfile-convert.c:340
#6 0x7fa2e7acf2b0 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
#7 0x55c421b03639 in _start
(/root/libsndfile-1.0.27/programs/sndfile-convert+0x2d639)
0x62100001dd10 is located 0 bytes to the right of 4112-byte region
[0x62100001cd00,0x62100001dd10)
allocated by thread T0 here:
#0 0x7fa2e8b67d28 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc1d28)
#1 0x7fa2e887bfa8 (/usr/lib/x86_64-linux-gnu/libFLAC.so.8+0x4cfa8)
SUMMARY: AddressSanitizer: heap-buffer-overflow
/root/libsndfile-1.0.27/src/flac.c:263 in flac_buffer_copy
Shadow bytes around the buggy address:
0x0c427fffbb50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffbb60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffbb70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffbb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fffbb90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fffbba0: 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffbbb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffbbc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffbbd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffbbe0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fffbbf0: 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
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
==19330==ABORTING
root@sid:~/libsndfile-1.0.27#
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2017-8363
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8363
[1] https://github.com/erikd/libsndfile/issues/233
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
