Source: libsndfile
Version: 1.0.27-2
Severity: important
Tags: security patch upstream
Forwarded: https://github.com/erikd/libsndfile/issues/232#issuecomment-300267444
Hi,
the following vulnerability was published for libsndfile.
CVE-2017-8361[0]:
| The flac_buffer_copy function in flac.c in libsndfile 1.0.28 allows
| remote attackers to cause a denial of service (buffer overflow and
| application crash) or possibly have unspecified other impact via a
| crafted audio file.
root@sid:~/libsndfile-1.0.27# ASAN_OPTIONS='detect_leaks=0'
./programs/sndfile-convert
~/poc/00265-libsndfile-globaloverflow-flac_buffer_copy /tmp/out.wav
=================================================================
==19742==ERROR: AddressSanitizer: global-buffer-overflow on address
0x555fbce48220 at pc 0x555fbcb08bbe bp 0x7ffff8e810d0 sp 0x7ffff8e810c8
WRITE of size 4 at 0x555fbce48220 thread T0
#0 0x555fbcb08bbd in flac_buffer_copy /root/libsndfile-1.0.27/src/flac.c:263
#1 0x555fbcb09bc1 in sf_flac_write_callback
/root/libsndfile-1.0.27/src/flac.c:387
#2 0x7fa32d65f18e (/usr/lib/x86_64-linux-gnu/libFLAC.so.8+0x4e18e)
#3 0x7fa32d66269c in FLAC__stream_decoder_process_single
(/usr/lib/x86_64-linux-gnu/libFLAC.so.8+0x5169c)
#4 0x555fbcb0caa7 in flac_read_loop /root/libsndfile-1.0.27/src/flac.c:920
#5 0x555fbcb0ce26 in flac_read_flac2i /root/libsndfile-1.0.27/src/flac.c:962
#6 0x555fbcae3f8c in sf_readf_int /root/libsndfile-1.0.27/src/sndfile.c:1778
#7 0x555fbcad8ec7 in sfe_copy_data_int
/root/libsndfile-1.0.27/programs/common.c:87
#8 0x555fbcad8930 in main
/root/libsndfile-1.0.27/programs/sndfile-convert.c:340
#9 0x7fa32c8b12b0 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
#10 0x555fbcad7639 in _start
(/root/libsndfile-1.0.27/programs/sndfile-convert+0x2d639)
0x555fbce48220 is located 32 bytes to the left of global variable 'sf_errno'
defined in 'sndfile.c:293:5' (0x555fbce48240) of size 4
0x555fbce48220 is located 0 bytes to the right of global variable 'data'
defined in 'common.c:80:14' (0x555fbce44220) of size 16384
SUMMARY: AddressSanitizer: global-buffer-overflow
/root/libsndfile-1.0.27/src/flac.c:263 in flac_buffer_copy
Shadow bytes around the buggy address:
0x0aac779c0ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0aac779c1040: 00 00 00 00[f9]f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9
0x0aac779c1050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0aac779c1090: 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
==19742==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-2017-8361
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8361
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
