From ef3d8be0f80cbb650e4766b545d61e10d7a24c9e Mon Sep 17 00:00:00 2001 From: Mans Rullgard Date: Sun, 5 Nov 2017 16:21:23 +0000 Subject: [PATCH] wav: ima_adpcm: fix buffer overflow on corrupt input (CVE-2017-15370) Add the same check bad block size as was done for MS adpcm in commit f39c574b ("More checks for invalid MS ADPCM blocks"). --- src/wav.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/wav.c b/src/wav.c index 5202556c..3e80e692 100644 --- a/src/wav.c +++ b/src/wav.c @@ -127,7 +127,7 @@ static unsigned short ImaAdpcmReadBlock(sox_format_t * ft) /* work with partial blocks. Specs say it should be null */ /* padded but I guess this is better than trailing quiet. */ samplesThisBlock = lsx_ima_samples_in((size_t)0, (size_t)ft->signal.channels, bytesRead, (size_t) 0); - if (samplesThisBlock == 0) + if (samplesThisBlock == 0 || samplesThisBlock > wav->samplesPerBlock) { lsx_warn("Premature EOF on .wav input file"); return 0;