shithub: sox

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ref: 52924c14fbee326334b2e4d459cbe0f2e21ceed2
parent: 3ccca3b8b82cbd2a146110b07cbf7fd867de8ead
author: Bastien Roucariès <rouca@debian.org>
date: Sun Aug 13 10:14:09 EDT 2023

CVE-2023-32627 Filter null sampling rate in VOC coder

Avoid a divide by zero and out of bound read by rejecting null sampling rate in VOC file

bug: https://sourceforge.net/p/sox/bugs/369/
bug-redhat: https://bugzilla.redhat.com/show_bug.cgi?id=2212282
bug-debian: https://bugs.debian.org/1041112
bug-debian-security: https://security-tracker.debian.org/tracker/CVE-2023-32627

--- a/src/voc.c

+++ b/src/voc.c

@@ -353,6 +353,11 @@

             v->block_remaining = 0;

             return done;

           }

+          if(uc == 0) {

+            lsx_fail_errno(ft, EINVAL, "invalid rate value");

+            v->block_remaining = 0;

+            return done;

+          }

           *buf = SOX_UNSIGNED_8BIT_TO_SAMPLE(uc,);

           lsx_adpcm_init(&v->adpcm, 6 - v->size, SOX_SAMPLE_TO_SIGNED_16BIT(*buf, ft->clips));

           ++buf;