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* Fri Jan 18 2008 Dave Airlie <airlied@redhat.com> 1.4.99.1-0.18

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- cve-2007-6429.patch: Fix patch to not break java apps
This commit is contained in:
Dave Airlie 2008-01-18 20:00:12 +00:00
parent e002a5ab25
commit 277f8aacd1
2 changed files with 84 additions and 93 deletions
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176
cve-2007-6429.patch
View File

@ -1,69 +1,20 @@
From 6de61f82728df22ea01f9659df6581b87f33f11d Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@bluenote.herrb.com>
Date: Thu, 17 Jan 2008 15:28:42 +0100
Subject: [PATCH] Fix for CVE-2007-6429 - MIT-SHM and EVI extensions integer overflows.
---
Xext/EVI.c | 15 ++++++++++++++-
Xext/sampleEVI.c | 29 ++++++++++++++++++++++++-----
Xext/shm.c | 46 ++++++++++++++++++++++++++++++++++++++--------
3 files changed, 76 insertions(+), 14 deletions(-)
diff --git a/Xext/EVI.c b/Xext/EVI.c
index 4bd050c..a637bae 100644
--- a/Xext/EVI.c
+++ b/Xext/EVI.c
@@ -34,6 +34,7 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include <X11/extensions/XEVIstr.h>
#include "EVIstruct.h"
#include "modinit.h"
+#include "scrnintstr.h"
static EviPrivPtr eviPriv;
@@ -84,10 +85,22 @@ ProcEVIGetVisualInfo(ClientPtr client)
{
REQUEST(xEVIGetVisualInfoReq);
xEVIGetVisualInfoReply rep;
- int n, n_conflict, n_info, sz_info, sz_conflict;
+ int i, n, n_conflict, n_info, sz_info, sz_conflict;
VisualID32 *conflict;
+ unsigned int total_visuals = 0;
xExtendedVisualInfo *eviInfo;
int status;
+
+ /*
+ * do this first, otherwise REQUEST_FIXED_SIZE can overflow. we assume
+ * here that you don't have more than 2^32 visuals over all your screens;
+ * this seems like a safe assumption.
+ */
+ for (i = 0; i < screenInfo.numScreens; i++)
+ total_visuals += screenInfo.screens[i]->numVisuals;
+ if (stuff->n_visual > total_visuals)
+ return BadValue;
+
REQUEST_FIXED_SIZE(xEVIGetVisualInfoReq, stuff->n_visual * sz_VisualID32);
status = eviPriv->getVisualInfo((VisualID32 *)&stuff[1], (int)stuff->n_visual,
&eviInfo, &n_info, &conflict, &n_conflict);
diff --git a/Xext/sampleEVI.c b/Xext/sampleEVI.c
index 7508aa7..b871bfd 100644
--- a/Xext/sampleEVI.c
+++ b/Xext/sampleEVI.c
@@ -34,6 +34,13 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
--- xorg-server-1.1.1/Xext/sampleEVI.c.cve-2007-6429 2006-07-05 14:31:36.000000000 -0400
+++ xorg-server-1.1.1/Xext/sampleEVI.c 2008-01-18 14:15:44.000000000 -0500
@@ -36,6 +36,13 @@
#include <X11/extensions/XEVIstr.h>
#include "EVIstruct.h"
#include "scrnintstr.h"
+
+#if HAVE_STDINT_H
+#include <stdint.h>
+#elif !defined(UINT32_MAX)
+#define UINT32_MAX 0xffffffffU
+#elif !defined(INT_MAX)
+#define INT_MAX 0x7fffffff
+#endif
+
static int sampleGetVisualInfo(
VisualID32 *visual,
int n_visual,
@@ -42,24 +49,36 @@ static int sampleGetVisualInfo(
@@ -44,24 +51,36 @@
VisualID32 **conflict_rn,
int *n_conflict_rn)
{
@ -105,12 +56,44 @@ index 7508aa7..b871bfd 100644
for (scrI = 0; scrI < screenInfo.numScreens; scrI++) {
for (visualI = 0; visualI < n_visual; visualI++) {
evi[sz_evi].core_visual_id = visual[visualI];
diff --git a/Xext/shm.c b/Xext/shm.c
index e3d7a23..c545e49 100644
--- a/Xext/shm.c
+++ b/Xext/shm.c
@@ -757,6 +757,8 @@ ProcPanoramiXShmCreatePixmap(
int i, j, result, rc;
--- xorg-server-1.1.1/Xext/EVI.c.cve-2007-6429 2006-07-05 14:31:36.000000000 -0400
+++ xorg-server-1.1.1/Xext/EVI.c 2008-01-18 14:15:44.000000000 -0500
@@ -36,6 +36,7 @@
#include <X11/extensions/XEVIstr.h>
#include "EVIstruct.h"
#include "modinit.h"
+#include "scrnintstr.h"
#if 0
static unsigned char XEVIReqCode = 0;
@@ -89,10 +90,22 @@
{
REQUEST(xEVIGetVisualInfoReq);
xEVIGetVisualInfoReply rep;
- int n, n_conflict, n_info, sz_info, sz_conflict;
+ int i, n, n_conflict, n_info, sz_info, sz_conflict;
VisualID32 *conflict;
+ unsigned int total_visuals = 0;
xExtendedVisualInfo *eviInfo;
int status;
+
+ /*
+ * do this first, otherwise REQUEST_FIXED_SIZE can overflow. we assume
+ * here that you don't have more than 2^32 visuals over all your screens;
+ * this seems like a safe assumption.
+ */
+ for (i = 0; i < screenInfo.numScreens; i++)
+ total_visuals += screenInfo.screens[i]->numVisuals;
+ if (stuff->n_visual > total_visuals)
+ return BadValue;
+
REQUEST_FIXED_SIZE(xEVIGetVisualInfoReq, stuff->n_visual * sz_VisualID32);
status = eviPriv->getVisualInfo((VisualID32 *)&stuff[1], (int)stuff->n_visual,
&eviInfo, &n_info, &conflict, &n_conflict);
--- xorg-server-1.1.1/Xext/shm.c.cve-2007-6429 2006-07-05 14:31:36.000000000 -0400
+++ xorg-server-1.1.1/Xext/shm.c 2008-01-18 14:19:28.000000000 -0500
@@ -725,6 +725,8 @@
int i, j, result;
ShmDescPtr shmdesc;
REQUEST(xShmCreatePixmapReq);
+ unsigned int width, height, depth;
@ -118,9 +101,9 @@ index e3d7a23..c545e49 100644
PanoramiXRes *newPix;
REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
@@ -770,11 +772,26 @@ ProcPanoramiXShmCreatePixmap(
return rc;
@@ -734,11 +736,18 @@
LEGAL_NEW_RESOURCE(stuff->pid, client);
VERIFY_GEOMETRABLE(pDraw, stuff->drawable, client);
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
- if (!stuff->width || !stuff->height)
+
@ -134,8 +117,22 @@ index e3d7a23..c545e49 100644
}
+ if (width > 32767 || height > 32767)
+ return BadAlloc;
+
if (stuff->depth != 1)
{
pDepth = pDraw->pScreen->allowedDepths;
@@ -748,10 +757,19 @@
client->errorValue = stuff->depth;
return BadValue;
}
+
CreatePmap:
- VERIFY_SHMSIZE(shmdesc, stuff->offset,
- PixmapBytePad(stuff->width, stuff->depth) * stuff->height,
- client);
+ /* now w/h/d are valid; but will they overflow a 32-bit pointer? */
+ size = PixmapBytePad(width, depth) * height;
+ if (sizeof(size) == 4) {
+ if (sizeof(void *) == 4 && BitsPerPixel(depth) > 8) {
+ if (size < width * height)
+ return BadAlloc;
+ /* thankfully, offset is unsigned */
@ -143,22 +140,12 @@ index e3d7a23..c545e49 100644
+ return BadAlloc;
+ }
+
if (stuff->depth != 1)
{
pDepth = pDraw->pScreen->allowedDepths;
@@ -785,9 +802,7 @@ ProcPanoramiXShmCreatePixmap(
return BadValue;
}
CreatePmap:
- VERIFY_SHMSIZE(shmdesc, stuff->offset,
- PixmapBytePad(stuff->width, stuff->depth) * stuff->height,
- client);
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
if(!(newPix = (PanoramiXRes *) xalloc(sizeof(PanoramiXRes))))
return BadAlloc;
@@ -1086,6 +1101,8 @@ ProcShmCreatePixmap(client)
register int i, rc;
@@ -1049,6 +1067,8 @@
register int i;
ShmDescPtr shmdesc;
REQUEST(xShmCreatePixmapReq);
+ unsigned int width, height, depth;
@ -166,9 +153,9 @@ index e3d7a23..c545e49 100644
REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
client->errorValue = stuff->pid;
@@ -1098,11 +1115,26 @@ ProcShmCreatePixmap(client)
return rc;
@@ -1057,11 +1077,18 @@
LEGAL_NEW_RESOURCE(stuff->pid, client);
VERIFY_GEOMETRABLE(pDraw, stuff->drawable, client);
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
- if (!stuff->width || !stuff->height)
+
@ -182,8 +169,22 @@ index e3d7a23..c545e49 100644
}
+ if (width > 32767 || height > 32767)
+ return BadAlloc;
+
if (stuff->depth != 1)
{
pDepth = pDraw->pScreen->allowedDepths;
@@ -1071,10 +1098,19 @@
client->errorValue = stuff->depth;
return BadValue;
}
+
CreatePmap:
- VERIFY_SHMSIZE(shmdesc, stuff->offset,
- PixmapBytePad(stuff->width, stuff->depth) * stuff->height,
- client);
+ /* now w/h/d are valid; but will they overflow a 32-bit pointer? */
+ size = PixmapBytePad(width, depth) * height;
+ if (sizeof(size) == 4) {
+ if (sizeof(void *) == 4 && BitsPerPixel(depth) > 8) {
+ if (size < width * height)
+ return BadAlloc;
+ /* thankfully, offset is unsigned */
@ -191,20 +192,7 @@ index e3d7a23..c545e49 100644
+ return BadAlloc;
+ }
+
if (stuff->depth != 1)
{
pDepth = pDraw->pScreen->allowedDepths;
@@ -1113,9 +1145,7 @@ ProcShmCreatePixmap(client)
return BadValue;
}
CreatePmap:
- VERIFY_SHMSIZE(shmdesc, stuff->offset,
- PixmapBytePad(stuff->width, stuff->depth) * stuff->height,
- client);
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
pMap = (*shmFuncs[pDraw->pScreen->myNum]->CreatePixmap)(
pDraw->pScreen, stuff->width,
stuff->height, stuff->depth,
--
1.5.3.6

5
xorg-x11-server.spec
View File

@ -20,7 +20,7 @@
Summary: X.Org X11 X server
Name: xorg-x11-server
Version: 1.4.99.1
Release: 0.17.%{?gitdate}%{?dist}
Release: 0.18.%{?gitdate}%{?dist}
URL: http://www.x.org
License: MIT
Group: User Interface/X
@ -515,6 +515,9 @@ rm -rf $RPM_BUILD_ROOT
%changelog
* Fri Jan 18 2008 Dave Airlie <airlied@redhat.com> 1.4.99.1-0.18
- cve-2007-6429.patch: Fix patch to not break java apps
* Fri Jan 18 2008 Dave Airlie <airlied@redhat.com> 1.4.99.1-0.17
- cve-2007-5760.patch: XFree86-Misc Extension Invalid Array Index Vulnerability
- cve-2007-6427.patch: XInput Extension Memory Corruption Vulnerability