34 lines
1.2 KiB
Diff
34 lines
1.2 KiB
Diff
commit 85c877d5072866aadbe8ed0c3e0590fbb5e16788
|
|
Author: Fabian Greffrath <fabian@greffrath.com>
|
|
Date: Thu Sep 28 12:15:04 2017 +0200
|
|
|
|
double64_init: Check psf->sf.channels against upper bound
|
|
|
|
This prevents division by zero later in the code.
|
|
|
|
While the trivial case to catch this (i.e. sf.channels < 1) has already
|
|
been covered, a crafted file may report a number of channels that is
|
|
so high (i.e. > INT_MAX/sizeof(double)) that it "somehow" gets
|
|
miscalculated to zero (if this makes sense) in the determination of the
|
|
blockwidth. Since we only support a limited number of channels anyway,
|
|
make sure to check here as well.
|
|
|
|
CVE-2017-14634
|
|
|
|
Closes: https://github.com/erikd/libsndfile/issues/318
|
|
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
|
|
|
|
diff --git src/double64.c src/double64.c
|
|
index b318ea86..78dfef7f 100644
|
|
--- src/double64.c
|
|
+++ src/double64.c
|
|
@@ -91,7 +91,7 @@ int
|
|
double64_init (SF_PRIVATE *psf)
|
|
{ static int double64_caps ;
|
|
|
|
- if (psf->sf.channels < 1)
|
|
+ if (psf->sf.channels < 1 || psf->sf.channels > SF_MAX_CHANNELS)
|
|
{ psf_log_printf (psf, "double64_init : internal error : channels = %d\n", psf->sf.channels) ;
|
|
return SFE_INTERNAL ;
|
|
} ;
|