oss-sec mailing list archives
audiofile: multiple ubsan crashes
From: "Agostino Sarubbo" <ago () gentoo org>
Date: Sun, 26 Feb 2017 11:56:31 +0000
Description: audiofile is a C-based library for reading and writing audio files in many common formats. A fuzz on it discovered multiple crashes because of undefined behavior. The complete UBsan output: # sfconvert @@ out.mp3 format aiff /tmp/portage/media-libs/audiofile-0.3.6-r3/work/audiofile-0.3.6/libaudiofile/WAVE.cpp:289:14: runtime error: index 256 out of bounds for type 'int16_t [256][2]' /tmp/portage/media-libs/audiofile-0.3.6-r3/work/audiofile-0.3.6/libaudiofile/WAVE.cpp:290:14: runtime error: index 256 out of bounds for type 'int16_t [256][2]' Reproducer: https://github.com/asarubbo/poc/blob/master/00191-audiofile-indexoob ########################################## # sfconvert @@ out.mp3 format aiff /tmp/portage/media-libs/audiofile-0.3.6-r3/work/audiofile-0.3.6/sfcommands/sfconvert.c:327:42: runtime error: signed integer overflow: 65536 * 252936 cannot be represented in type 'int' Reproducer: https://github.com/asarubbo/poc/blob/master/00192-audiofile-signintoverflow-sfconvert ########################################## # sfconvert @@ out.mp3 format aiff /tmp/portage/media-libs/audiofile-0.3.6-r3/work/audiofile-0.3.6/libaudiofile/modules/MSADPCM.cpp:115:27: runtime error: signed integer overflow: 5512570 * 409 cannot be represented in type 'int' Reproducer: https://github.com/asarubbo/poc/blob/master/00193-audiofile-signintoverflow-MSADPCM ########################################## Affected version: 0.3.6 Fixed version: N/A Commit fix: N/A Credit: These bugs were discovered by Agostino Sarubbo of Gentoo. Timeline: 2017-02-20: bug discovered and reported to upstream 2017-02-20: blog post about the issue Note: These bugs were found with American Fuzzy Lop. Permalink: https://blogs.gentoo.org/ago/2017/02/20/audiofile-multiple-ubsan-crashes -- Agostino Sarubbo Gentoo Linux Developer
Current thread:
- audiofile: multiple ubsan crashes Agostino Sarubbo (Feb 26)
- Re: audiofile: multiple ubsan crashes Agostino Sarubbo (Mar 13)