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A null pointer dereference issue was discovered in functions op_get_data and op_open1 in opusfile.c in xiph opusfile 0.9 thru 0.12 allows attackers to cause denial of service or other unspecified impacts. Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 0a4cd796df5b030cb866f3f4a5e41a4b92caddf5 Mon Sep 17 00:00:00 2001
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From: Ralph Giles <giles@thaumas.net>
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Date: Tue, 6 Sep 2022 19:04:31 -0700
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Subject: [PATCH] Propagate allocation failure from ogg_sync_buffer.
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Instead of segfault, report OP_EFAULT if ogg_sync_buffer returns
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a null pointer. This allows more graceful recovery by the caller
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in the unlikely event of a fallible ogg_malloc call.
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We do check the return value elsewhere in the code, so the new
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checks make the code more consistent.
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Thanks to https://github.com/xiph/opusfile/issues/36 for reporting.
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Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
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Signed-off-by: Mark Harris <mark.hsj@gmail.com>
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[Retrieved from:
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https://github.com/xiph/opusfile/commit/0a4cd796df5b030cb866f3f4a5e41a4b92caddf5]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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src/opusfile.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/src/opusfile.c b/src/opusfile.c
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index ca219b2..3c3c81e 100644
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--- a/src/opusfile.c
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+++ b/src/opusfile.c
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@@ -148,6 +148,7 @@ static int op_get_data(OggOpusFile *_of,int _nbytes){
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int nbytes;
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OP_ASSERT(_nbytes>0);
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buffer=(unsigned char *)ogg_sync_buffer(&_of->oy,_nbytes);
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+ if(OP_UNLIKELY(buffer==NULL))return OP_EFAULT;
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nbytes=(int)(*_of->callbacks.read)(_of->stream,buffer,_nbytes);
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OP_ASSERT(nbytes<=_nbytes);
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if(OP_LIKELY(nbytes>0))ogg_sync_wrote(&_of->oy,nbytes);
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@@ -1527,6 +1528,7 @@ static int op_open1(OggOpusFile *_of,
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if(_initial_bytes>0){
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char *buffer;
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buffer=ogg_sync_buffer(&_of->oy,(long)_initial_bytes);
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+ if(OP_UNLIKELY(buffer==NULL))return OP_EFAULT;
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memcpy(buffer,_initial_data,_initial_bytes*sizeof(*buffer));
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ogg_sync_wrote(&_of->oy,(long)_initial_bytes);
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}
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