There is a heap-based buffer over-read at wav.c in wav_write_header in libsndfile 1.0.28 that will cause a denial of service. CVE: CVE-2018-19758 Upstream-Status: Backport [42132c543358cee9f7c3e9e9b15bb6c1063a608e] Signed-off-by: Ross Burton From c12173b0197dd0c5cfa2cd27977e982d2ae59486 Mon Sep 17 00:00:00 2001 From: Erik de Castro Lopo Date: Tue, 1 Jan 2019 20:11:46 +1100 Subject: [PATCH] src/wav.c: Fix heap read overflow This is CVE-2018-19758. Closes: https://github.com/erikd/libsndfile/issues/435 --- src/wav.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/wav.c b/src/wav.c index e8405b55..6fb94ae8 100644 --- a/src/wav.c +++ b/src/wav.c @@ -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 ; -- 2.11.0