gentoo-overlay/x11-misc/x11vnc/files/x11vnc-0.9.16-CVE-2020-29074.patch

From 69eeb9f7baa14ca03b16c9de821f9876def7a36a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gu=C3=A9nal=20DAVALAN?= <guenal.davalan@uca.fr>
Date: Wed, 18 Nov 2020 08:40:45 +0100
Subject: [PATCH] scan: limit access to shared memory segments to current user

---
 src/scan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scan.c b/src/scan.c
index 43e00d2..12994d5 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -320,7 +320,7 @@ static int shm_create(XShmSegmentInfo *shm, XImage **ximg_ptr, int w, int h,
 
 #if HAVE_XSHM
 	shm->shmid = shmget(IPC_PRIVATE,
-	    xim->bytes_per_line * xim->height, IPC_CREAT | 0777);
+	    xim->bytes_per_line * xim->height, IPC_CREAT | 0600);
 
 	if (shm->shmid == -1) {
 		rfbErr("shmget(%s) failed.\n", name);
-- 
2.26.2