38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
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From c57c32e6cfeda40b3f006a5ba63a3ff161e8d497 Mon Sep 17 00:00:00 2001
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From: matt335672 <30179339+matt335672@users.noreply.github.com>
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Date: Tue, 6 Dec 2022 11:31:31 +0000
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Subject: [PATCH] CVE-2022-23477
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Prevent buffer overflow for oversized audio format from client
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---
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sesman/chansrv/audin.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/sesman/chansrv/audin.c b/sesman/chansrv/audin.c
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index cd802fa5..36a8027a 100644
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--- a/sesman/chansrv/audin.c
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+++ b/sesman/chansrv/audin.c
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@@ -181,15 +181,16 @@ audin_send_open(int chan_id)
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int error;
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int bytes;
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struct stream *s;
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- struct xr_wave_format_ex *wf;
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+ struct xr_wave_format_ex *wf = g_client_formats[g_current_format];
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LOG_DEVEL(LOG_LEVEL_INFO, "audin_send_open:");
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make_stream(s);
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- init_stream(s, 8192);
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+ /* wf->cbSize was checked when the format was received */
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+ init_stream(s, wf->cbSize + 64);
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+
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out_uint8(s, MSG_SNDIN_OPEN);
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out_uint32_le(s, 2048); /* FramesPerPacket */
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out_uint32_le(s, g_current_format); /* initialFormat */
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- wf = g_client_formats[g_current_format];
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out_uint16_le(s, wf->wFormatTag);
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out_uint16_le(s, wf->nChannels);
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out_uint32_le(s, wf->nSamplesPerSec);
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--
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2.39.0
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