From a79ec216cd119069c68b8f3542c6a425a74ab993 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Guido=20G=C3=BCnther?= <agx@sigxcpu.org>
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Date: Tue, 31 Oct 2017 18:32:46 +0100
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Subject: [PATCH] CVE-2017-14633: Don't allow for more than 256 channels
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Otherwise
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for(i=0;i<vi->channels;i++){
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/* the encoder setup assumes that all the modes used by any
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specific bitrate tweaking use the same floor */
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int submap=info->chmuxlist[i];
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overreads later in mapping0_forward since chmuxlist is a fixed array of
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256 elements max.
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Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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---
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lib/info.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/lib/info.c b/lib/info.c
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index fe759ed..7bc4ea4 100644
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--- a/lib/info.c
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+++ b/lib/info.c
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@@ -588,7 +588,7 @@ int vorbis_analysis_headerout(vorbis_dsp_state *v,
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oggpack_buffer opb;
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private_state *b=v->backend_state;
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- if(!b||vi->channels<=0){
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+ if(!b||vi->channels<=0||vi->channels>256){
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ret=OV_EFAULT;
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goto err_out;
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}
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--
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2.11.0
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