Bugzilla – Bug 1026984
VUL-1: CVE-2017-6832: audiofile: heap-based buffer overflow in MSADPCM::decodeBlock (MSADPCM.cpp)
Last modified: 2017-07-13 12:24:36 UTC
Ref: http://seclists.org/oss-sec/2017/q1/510 ============================================== Description: audiofile is a C-based library for reading and writing audio files in many common formats. A fuzz on it discovered an heap overflow. The complete ASan output: # sfconvert @@ out.mp3 format aiff ==2512==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62d00001c45a at pc 0x7fe7476f387d bp 0x7ffc3b0e3bf0 sp 0x7ffc3b0e3be8 WRITE of size 2 at 0x62d00001c45a thread T0 #0 0x7fe7476f387c in MSADPCM::decodeBlock(unsigned char const*, short*) /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/MSADPCM.cpp:222:14 #1 0x7fe7476c1ac9 in BlockCodec::runPull() /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/BlockCodec.cpp:55:3 #2 0x7fe7476fac20 in RebufferModule::runPull() /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/RebufferModule.cpp:122:3 #3 0x7fe7476ab05a in afReadFrames /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/data.cpp:222:14 #4 0x50bbeb in copyaudiodata /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:340:29 #5 0x50b050 in main /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:248:17 #6 0x7fe74678078f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 #7 0x419f48 in _init (/usr/bin/sfconvert+0x419f48) 0x62d00001c45a is located 0 bytes to the right of 32858-byte region [0x62d000014400,0x62d00001c45a) allocated by thread T0 here: #0 0x4d2d08 in malloc /tmp/portage/sys-devel/llvm-3.9.1-r1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:64 #1 0x7fe746419687 in operator new(unsigned long) (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libstdc++.so.6+0xb2687) #2 0x7fe7476af43c in afGetFrameCount /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/format.cpp:205:41 #3 0x50bb5c in copyaudiodata /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:329:29 #4 0x50b050 in main /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:248:17 #5 0x7fe74678078f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289 SUMMARY: AddressSanitizer: heap-buffer-overflow /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/MSADPCM.cpp:222:14 in MSADPCM::decodeBlock(unsigned char const*, short*) Shadow bytes around the buggy address: 0x0c5a7fffb830: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5a7fffb840: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5a7fffb850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5a7fffb860: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5a7fffb870: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c5a7fffb880: 00 00 00 00 00 00 00 00 00 00 00[02]fa fa fa fa 0x0c5a7fffb890: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5a7fffb8a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5a7fffb8b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5a7fffb8c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5a7fffb8d0: 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 ==2512==ABORTING Affected version: 0.3.6 Fixed version: N/A Commit fix: N/A Credit: This bug was discovered by Agostino Sarubbo of Gentoo. CVE: N/A Reproducer: https://github.com/asarubbo/poc/blob/master/00186-audiofile-heapoverflow-MSADPCM-decodeBlock Timeline: 2017-02-20: bug discovered and reported to upstream 2017-02-20: blog post about the issue Note: This bug was found with American Fuzzy Lop. Permalink: https://blogs.gentoo.org/ago/2017/02/20/audiofile-heap-based-buffer-overflow-in-msadpcmdecodeblock-msadpcm-cpp ============================================== https://software.opensuse.org/package/audiofile TW|42.{1,2}: 0.3.6 VUL-1 because: http://seclists.org/oss-sec/2017/q1/504 ======================================================== Hello all. I discovered multiple crashes in the audiofile library. The maintainer was informed privately, I didn't see reactions and all details are public on my blog. I posted them to the cveform too, but I didn't get response. I'll send update if something will change. -- Agostino Sarubbo Gentoo Linux Developer ========================================================
bugbot adjusting priority
The check for the number of coefficients in boo#1026978 also fixes this issue. *** This bug has been marked as a duplicate of bug 1026978 ***
SUSE-SU-2017:0940-1: An update that fixes 14 vulnerabilities is now available. Category: security (low) Bug References: 1026978,1026979,1026980,1026981,1026982,1026983,1026984,1026985,1026986,1026987,1026988,949399 CVE References: CVE-2015-7747,CVE-2017-6827,CVE-2017-6828,CVE-2017-6829,CVE-2017-6830,CVE-2017-6831,CVE-2017-6832,CVE-2017-6833,CVE-2017-6834,CVE-2017-6835,CVE-2017-6836,CVE-2017-6837,CVE-2017-6838,CVE-2017-6839 Sources used: SUSE Linux Enterprise Software Development Kit 12-SP2 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Software Development Kit 12-SP1 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Server for Raspberry Pi 12-SP2 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Server 12-SP2 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Server 12-SP1 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Desktop 12-SP2 (src): audiofile-0.3.6-10.1 SUSE Linux Enterprise Desktop 12-SP1 (src): audiofile-0.3.6-10.1
openSUSE-SU-2017:1038-1: An update that fixes 13 vulnerabilities is now available. Category: security (low) Bug References: 1026978,1026979,1026980,1026981,1026982,1026983,1026984,1026985,1026986,1026987,1026988 CVE References: CVE-2017-6827,CVE-2017-6828,CVE-2017-6829,CVE-2017-6830,CVE-2017-6831,CVE-2017-6832,CVE-2017-6833,CVE-2017-6834,CVE-2017-6835,CVE-2017-6836,CVE-2017-6837,CVE-2017-6838,CVE-2017-6839 Sources used: openSUSE Leap 42.2 (src): audiofile-0.3.6-10.3.1 openSUSE Leap 42.1 (src): audiofile-0.3.6-12.1
SUSE-SU-2017:1182-1: An update that fixes 13 vulnerabilities is now available. Category: security (moderate) Bug References: 1026978,1026979,1026980,1026981,1026982,1026983,1026984,1026985,1026986,1026987,1026988 CVE References: CVE-2017-6827,CVE-2017-6828,CVE-2017-6829,CVE-2017-6830,CVE-2017-6831,CVE-2017-6832,CVE-2017-6833,CVE-2017-6834,CVE-2017-6835,CVE-2017-6836,CVE-2017-6837,CVE-2017-6838,CVE-2017-6839 Sources used: SUSE Linux Enterprise Software Development Kit 11-SP4 (src): audiofile-0.2.6-142.17.1 SUSE Linux Enterprise Server 11-SP4 (src): audiofile-0.2.6-142.17.1 SUSE Linux Enterprise Debuginfo 11-SP4 (src): audiofile-0.2.6-142.17.1
released