modular-xorg-*: provide patch (making this package equivalent to

xorg-server 1.20.9, couldn't find a tarball).

X.Org security advisory: July 31, 2020

X Server Pixel Data Uninitialized Memory Information Disclosure
===============================================================

CVE-2020-14347

Allocation for pixmap data in AllocatePixmap() does not initialize the
memory in xserver, it leads to leak uninitialize heap memory to
clients. When the X server runs with elevated privileges.

This flaw can lead to ASLR bypass, which when combined with other
flaws (known/unknown) could lead to lead to privilege elevation in the
client.

Patch
=====

A patch for this issue has been commited to the xorg server git
repository.  xorg-server 1.20.9 will be released shortly and will
include this patch.

https://gitlab.freedesktop.org/xorg/xserver.git

diff --git a/dix/pixmap.c b/dix/pixmap.c
index 1186d7dbb..5a0146bbb 100644
--- a/dix/pixmap.c
+++ b/dix/pixmap.c
@@ -116,7 +116,7 @@ AllocatePixmap(ScreenPtr pScreen, int pixDataSize)
     if (pScreen->totalPixmapSize > ((size_t) - 1) - pixDataSize)
         return NullPixmap;

-    pPixmap = malloc(pScreen->totalPixmapSize + pixDataSize);
+    pPixmap = calloc(1, pScreen->totalPixmapSize + pixDataSize);
     if (!pPixmap)
         return NullPixmap;

Thanks
======

This vulnerability was discovered by Jan-Niklas Sohn working with
Trend Micro Zero Day Initiative.

5 files changed, 35 insertions, 7 deletions

diff --git a/x11/modular-xorg-server/Makefile b/x11/modular-xorg-server/Makefile
index 64ae960761f..db3c39a0340 100644
--- a/x11/modular-xorg-server/Makefile
+++ b/x11/modular-xorg-server/Makefile
@@ -1,8 +1,8 @@
-# $NetBSD: Makefile,v 1.127 2020/05/22 10:56:48 adam Exp $
+# $NetBSD: Makefile,v 1.128 2020/07/31 16:50:57 maya Exp $
 
 DISTNAME=	xorg-server-${XORG_VERSION}
 PKGNAME=	modular-${DISTNAME}
-PKGREVISION=	1
+PKGREVISION=	2
 
 MAINTAINER=	pkgsrc-users@NetBSD.org
 COMMENT=	Modular X11 server from modular X.org
diff --git a/x11/modular-xorg-server/distinfo b/x11/modular-xorg-server/distinfo
index d523491c983..b28212e9ffe 100644
--- a/x11/modular-xorg-server/distinfo
+++ b/x11/modular-xorg-server/distinfo
@@ -1,10 +1,11 @@
-$NetBSD: distinfo,v 1.101 2020/03/30 11:49:39 wiz Exp $
+$NetBSD: distinfo,v 1.102 2020/07/31 16:50:57 maya Exp $
 
 SHA1 (xorg-server-1.20.8.tar.bz2) = 077d081f912faf11c87ea1c9d0e29490961b0cd4
 RMD160 (xorg-server-1.20.8.tar.bz2) = 74f2a5ab7b482d2aded54fd412e9c0d673f270ba
 SHA512 (xorg-server-1.20.8.tar.bz2) = ab0ec0fcbf490c61558b9297f61b58fd2dedb676c78bef6431dc9166054743b43a0091b88a8b3f4e81d1f539909440ee7e188a298cefabe13ea89159639cd805
 Size (xorg-server-1.20.8.tar.bz2) = 6309640 bytes
 SHA1 (patch-configure) = ce2c732c3d8493445744a927a25b9cd3b45880f8
+SHA1 (patch-dix_pixmap.c) = 92c9343f71ddc418c0f61e8138e0b209cefcb221
 SHA1 (patch-hw_xfree86_common_xf86AutoConfig.c) = 70adf85be9fc6222a335686e7e9e9f385aca02f9
 SHA1 (patch-hw_xfree86_common_xf86sbusBus.h) = f56f87336b2f669413ebb1005a2b64568a111f92
 SHA1 (patch-hw_xfree86_dri2_dri2.c) = 0bf58305059321e10f6f58186301dbb7cb858c2a
diff --git a/x11/modular-xorg-server/patches/patch-dix_pixmap.c b/x11/modular-xorg-server/patches/patch-dix_pixmap.c
new file mode 100644
index 00000000000..8711a558c00
--- /dev/null
+++ b/x11/modular-xorg-server/patches/patch-dix_pixmap.c
@@ -0,0 +1,27 @@
+$NetBSD: patch-dix_pixmap.c,v 1.1 2020/07/31 16:50:57 maya Exp $
+
+From aac28e162e5108510065ad4c323affd6deffd816 Mon Sep 17 00:00:00 2001
+From: Matthieu Herrb <matthieu@herrb.eu>
+Date: Sat, 25 Jul 2020 19:33:50 +0200
+Subject: [PATCH] fix for ZDI-11426
+
+Avoid leaking un-initalized memory to clients by zeroing the
+whole pixmap on initial allocation.
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
+Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
+
+--- dix/pixmap.c.orig	2020-03-29 20:21:15.000000000 +0000
++++ dix/pixmap.c
+@@ -117,7 +117,7 @@ AllocatePixmap(ScreenPtr pScreen, int pi
+     if (pScreen->totalPixmapSize > ((size_t) - 1) - pixDataSize)
+         return NullPixmap;
+ 
+-    pPixmap = malloc(pScreen->totalPixmapSize + pixDataSize);
++    pPixmap = calloc(1, pScreen->totalPixmapSize + pixDataSize);
+     if (!pPixmap)
+         return NullPixmap;
+ 
diff --git a/x11/modular-xorg-xephyr/Makefile b/x11/modular-xorg-xephyr/Makefile
index 57deacef38d..e0c511cef96 100644
--- a/x11/modular-xorg-xephyr/Makefile
+++ b/x11/modular-xorg-xephyr/Makefile
@@ -1,8 +1,8 @@
-# $NetBSD: Makefile,v 1.19 2020/05/22 10:56:48 adam Exp $
+# $NetBSD: Makefile,v 1.20 2020/07/31 16:50:57 maya Exp $
 
 DISTNAME=	xorg-server-${XORG_VERSION}
 PKGNAME=	modular-xorg-xephyr-${XORG_VERSION}
-PKGREVISION=	1
+PKGREVISION=	2
 
 DISTINFO_FILE=		${.CURDIR}/../../x11/modular-xorg-server/distinfo
 PATCHDIR=		${.CURDIR}/../../x11/modular-xorg-server/patches
diff --git a/x11/modular-xorg-xwayland/Makefile b/x11/modular-xorg-xwayland/Makefile
index e99fb5e872a..4ed833cf6b8 100644
--- a/x11/modular-xorg-xwayland/Makefile
+++ b/x11/modular-xorg-xwayland/Makefile
@@ -1,8 +1,8 @@
-# $NetBSD: Makefile,v 1.7 2020/05/22 10:56:48 adam Exp $
+# $NetBSD: Makefile,v 1.8 2020/07/31 16:50:57 maya Exp $
 
 DISTNAME=	xorg-server-${XORG_VERSION}
 PKGNAME=	modular-xorg-xwayland-${XORG_VERSION}
-PKGREVISION=	1
+PKGREVISION=	2
 
 DISTINFO_FILE=		${.CURDIR}/../../x11/modular-xorg-server/distinfo
 PATCHDIR=		${.CURDIR}/../../x11/modular-xorg-server/patches