48 lines
1.5 KiB
Diff
48 lines
1.5 KiB
Diff
From 7f19287be9b468b7065073a31d35c01b2632858d Mon Sep 17 00:00:00 2001
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From: qihao <qihao_yewu@cmss.chinamobile.com>
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Date: Tue, 5 Dec 2023 14:10:50 +0800
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Subject: [PATCH] ui/vnc-clipboard: fix inflate_buffer
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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cheery-pick from ebfbf394671163c14e2b24d98f3927a3151d1aff
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Commit d921fea338 ("ui/vnc-clipboard: fix infinite loop in
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inflate_buffer (CVE-2023-3255)") removed this hunk, but it is still
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required, because it can happen that stream.avail_in becomes zero
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before coming across a return value of Z_STREAM_END in the loop.
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This fixes the host->guest direction of the clipboard with noVNC and
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TigerVNC as clients.
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Fixes: d921fea338 ("ui/vnc-clipboard: fix infinite loop in inflate_buffer (CVE-2023-3255)")
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Reported-by: Friedrich Weber <f.weber@proxmox.com>
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-Id: <20231122125826.228189-1-f.ebner@proxmox.com>
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Signed-off-by: qihao_yewu <qihao_yewu@cmss.chinamobile.com>
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---
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ui/vnc-clipboard.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/ui/vnc-clipboard.c b/ui/vnc-clipboard.c
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index c84599cfdb..2bb1b07c40 100644
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--- a/ui/vnc-clipboard.c
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+++ b/ui/vnc-clipboard.c
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@@ -70,6 +70,11 @@ static uint8_t *inflate_buffer(uint8_t *in, uint32_t in_len, uint32_t *size)
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}
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}
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+ *size = stream.total_out;
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+ inflateEnd(&stream);
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+
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+ return out;
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+
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err_end:
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inflateEnd(&stream);
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err:
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--
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2.27.0
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