vorbis-tools/vorbis-tools-1.4.0-CVE-2015-6749.patch

44 lines
1.3 KiB
Diff

From 16d10a1c957425a49cf74332b99cf3d39e80cc09 Mon Sep 17 00:00:00 2001
From: Mark Harris <mark.hsj@gmail.com>
Date: Sun, 30 Aug 2015 05:54:46 -0700
Subject: [PATCH] oggenc: Fix large alloca on bad AIFF input
Fixes #2212
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
oggenc/audio.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/oggenc/audio.c b/oggenc/audio.c
index 1cbb214..547e826 100644
--- a/oggenc/audio.c
+++ b/oggenc/audio.c
@@ -246,8 +246,8 @@ static int aiff_permute_matrix[6][6] =
int aiff_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen)
{
int aifc; /* AIFC or AIFF? */
- unsigned int len;
- unsigned char *buffer;
+ unsigned int len, readlen;
+ unsigned char buffer[22];
unsigned char buf2[8];
aiff_fmt format;
aifffile *aiff = malloc(sizeof(aifffile));
@@ -271,9 +271,9 @@ int aiff_open(FILE *in, oe_enc_opt *opt, unsigned char *buf, int buflen)
return 0; /* Weird common chunk */
}
- buffer = alloca(len);
-
- if(fread(buffer,1,len,in) < len)
+ readlen = len < sizeof(buffer) ? len : sizeof(buffer);
+ if(fread(buffer,1,readlen,in) < readlen ||
+ (len > readlen && !seek_forward(in, len-readlen)))
{
fprintf(stderr, _("Warning: Unexpected EOF in reading AIFF header\n"));
return 0;
--
2.4.6