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audiofile: divide-by-zero in BlockCodec::reset1 (BlockCodec.cpp)
From: "Agostino Sarubbo" <ago () gentoo org>
Date: Sun, 26 Feb 2017 11:55:03 +0000
Description: audiofile is a C-based library for reading and writing audio files in many common formats. A fuzz on it discovered a division by zero. The complete ASan output: # sfconvert @@ out.mp3 format aiff ==3538==ERROR: AddressSanitizer: FPE on unknown address 0x7f86a8cffe14 (pc 0x7f86a8cffe14 bp 0x7ffe41d2ae00 sp 0x7ffe41d2adf0 T0) #0 0x7f86a8cffe13 in BlockCodec::reset1() /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/BlockCodec.cpp:74:61 #1 0x7f86a8d0b794 in ModuleState::reset(_AFfilehandle*, Track*) /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/ModuleState.cpp:218:9 #2 0x7f86a8d0b794 in ModuleState::setup(_AFfilehandle*, Track*) /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/ModuleState.cpp:190 #3 0x7f86a8ced43c in afGetFrameCount /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/format.cpp:205:41 #4 0x50bb5c in copyaudiodata /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:329:29 #5 0x50b050 in main /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/sfcommands/sfconvert.c:248:17 #6 0x7f86a7dbe78f 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) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: FPE /tmp/portage/media-libs/audiofile-0.3.6-r1/work/audiofile-0.3.6/libaudiofile/modules/BlockCodec.cpp:74:61 in BlockCodec::reset1() ==3538==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/00189-audiofile-fpe-BlockCodec-reset1 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-divide-by-zero-in-blockcodecreset1-blockcodec-cpp -- Agostino Sarubbo Gentoo Linux Developer
Current thread:
- audiofile: divide-by-zero in BlockCodec::reset1 (BlockCodec.cpp) Agostino Sarubbo (Feb 26)
- Re: audiofile: divide-by-zero in BlockCodec::reset1 (BlockCodec.cpp) Agostino Sarubbo (Mar 13)