https://marc.info/?l=oss-security&m=167571683504082&w=2

Index: src/formats_i.c
--- src/formats_i.c.orig
+++ src/formats_i.c
@@ -19,6 +19,7 @@
  */
 
 #include "sox_i.h"
+#include <limits.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <stdarg.h>
@@ -60,13 +61,24 @@ int lsx_check_read_params(sox_format_t * ft, unsigned 
   if (ft->seekable)
     ft->data_start = lsx_tell(ft);
 
-  if (channels && ft->signal.channels && ft->signal.channels != channels)
+  if (channels && ft->signal.channels && ft->signal.channels != channels) {
     lsx_warn("`%s': overriding number of channels", ft->filename);
-  else ft->signal.channels = channels;
+  } else if (channels > SHRT_MAX) {
+    lsx_fail_errno(ft, EINVAL, "implausibly large number of channels");
+    return SOX_EOF;
+  } else {
+    ft->signal.channels = channels;
+  }
 
-  if (rate && ft->signal.rate && ft->signal.rate != rate)
+  if (rate && ft->signal.rate && ft->signal.rate != rate) {
     lsx_warn("`%s': overriding sample rate", ft->filename);
-  else ft->signal.rate = rate;
+  /* Since NaN comparisons yield false, the negation rejects them. */
+  } else if (!(rate > 0)) {
+    lsx_fail_errno(ft, EINVAL, "invalid rate value");
+    return SOX_EOF;
+  } else {
+    ft->signal.rate = rate;
+  }
 
   if (encoding && ft->encoding.encoding && ft->encoding.encoding != encoding)
     lsx_warn("`%s': overriding encoding type", ft->filename);