3b6a105af8
scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user. Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
26 lines
922 B
Diff
26 lines
922 B
Diff
From 69eeb9f7baa14ca03b16c9de821f9876def7a36a Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Gu=C3=A9nal=20DAVALAN?= <guenal.davalan@uca.fr>
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Date: Wed, 18 Nov 2020 08:40:45 +0100
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Subject: [PATCH] scan: limit access to shared memory segments to current user
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[Retrieved from:
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https://github.com/LibVNC/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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src/scan.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/scan.c b/src/scan.c
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index 43e00d2..12994d5 100644
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--- a/src/scan.c
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+++ b/src/scan.c
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@@ -320,7 +320,7 @@ static int shm_create(XShmSegmentInfo *shm, XImage **ximg_ptr, int w, int h,
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#if HAVE_XSHM
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shm->shmid = shmget(IPC_PRIVATE,
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- xim->bytes_per_line * xim->height, IPC_CREAT | 0777);
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+ xim->bytes_per_line * xim->height, IPC_CREAT | 0600);
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if (shm->shmid == -1) {
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rfbErr("shmget(%s) failed.\n", name);
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