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SUSE:SLE-15-SP7:GA
xrdp.27351
xrdp-CVE-2022-23493.patch
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File xrdp-CVE-2022-23493.patch of Package xrdp.27351
From 88ff9886a8843f6b4631d3edcf6c9652bd76674e Mon Sep 17 00:00:00 2001 From: matt335672 <30179339+matt335672@users.noreply.github.com> Date: Wed, 7 Dec 2022 10:49:06 +0000 Subject: [PATCH 10/10] CVE-2022-23493 Check chansrv channel ID on a channel close Prevent OOB read if an invalid channel ID is sent. --- xrdp/xrdp_mm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xrdp/xrdp_mm.c b/xrdp/xrdp_mm.c index 7c8fca62..6c373da8 100644 --- a/xrdp/xrdp_mm.c +++ b/xrdp/xrdp_mm.c @@ -1237,6 +1237,10 @@ xrdp_mm_trans_process_drdynvc_channel_close(struct xrdp_mm* self, return 1; } in_uint32_le(s, chansrv_chan_id); + if (chansrv_chan_id < 0 || chansrv_chan_id > 255) + { + return 1; + } chan_id = self->cs2xr_cid_map[chansrv_chan_id]; /* close dynamic channel */ error = libxrdp_drdynvc_close(self->wm->session, chan_id); -- 2.39.0
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