From: Erik de Castro Lopo Date: Tue, 1 Jan 2019 20:11:46 +1100 Subject: src/wav.c: Fix heap read overflow This is CVE-2018-19758. Closes: https://github.com/erikd/libsndfile/issues/435 --- src/wav.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/wav.c b/src/wav.c index 4b943dc..59015a1 100644 --- src/wav.c +++ src/wav.c @@ -1,5 +1,5 @@ /* -** Copyright (C) 1999-2016 Erik de Castro Lopo +** Copyright (C) 1999-2019 Erik de Castro Lopo ** Copyright (C) 2004-2005 David Viens ** ** This program is free software; you can redistribute it and/or modify @@ -1094,6 +1094,8 @@ wav_write_header (SF_PRIVATE *psf, int calc_length) psf_binheader_writef (psf, "44", 0, 0) ; /* SMTPE format */ psf_binheader_writef (psf, "44", psf->instrument->loop_count, 0) ; + /* Loop count is signed 16 bit number so we limit it range to something sensible. */ + psf->instrument->loop_count &= 0x7fff ; for (tmp = 0 ; tmp < psf->instrument->loop_count ; tmp++) { int type ;