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Commit 3c658f9b authored by Emilio Pozuelo Monfort's avatar Emilio Pozuelo Monfort Committed by Ritesh Raj Sarraf
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Import Debian changes 2:1.20.11-1+deb11u2

parent d4677653
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Tags debian/2%1.20.11-1+deb11u2
3 merge requests!33Merge changes from apertis/v2022-security into apertis/v2022,!31v2022 ← v2023pre backport: Update from debian/bullseye-security,!29Update from debian/bullseye-security for apertis/v2023dev3
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debian/changelog
+ 8
− 0
View file @ 3c658f9b
xorg-server (2:1.20.11-1+deb11u2) bullseye-security; urgency=medium
* xkb: add request length validation for XkbSetGeometry (CVE-2022-2319)
* xkb: swap XkbSetDeviceInfo and XkbSetDeviceInfoCheck (CVE-2022-2320)
* Closes: #1014903.
-- Emilio Pozuelo Monfort <pochu@debian.org> Fri, 05 Aug 2022 10:00:36 +0200
xorg-server (2:1.20.11-1+deb11u1) bullseye-security; urgency=high
* Team upload.
......
debian/patches/08_xkb-switch-to-array-index-loops-to-moving-pointers.patch 0 → 100644
+ 75
− 0
View file @ 3c658f9b
From f1070c01d616c5f21f939d5ebc533738779451ac Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 5 Jul 2022 12:40:47 +1000
Subject: [PATCH] xkb: switch to array index loops to moving pointers
Most similar loops here use a pointer that advances with each loop
iteration, let's do the same here for consistency.
No functional changes.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
---
xkb/xkb.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/xkb/xkb.c b/xkb/xkb.c
index a29262c24..64e52611e 100644
--- a/xkb/xkb.c
+++ b/xkb/xkb.c
@@ -5368,16 +5368,16 @@ _CheckSetSections(XkbGeometryPtr geom,
row->left = rWire->left;
row->vertical = rWire->vertical;
kWire = (xkbKeyWireDesc *) &rWire[1];
- for (k = 0; k < rWire->nKeys; k++) {
+ for (k = 0; k < rWire->nKeys; k++, kWire++) {
XkbKeyPtr key;
key = XkbAddGeomKey(row);
if (!key)
return BadAlloc;
- memcpy(key->name.name, kWire[k].name, XkbKeyNameLength);
- key->gap = kWire[k].gap;
- key->shape_ndx = kWire[k].shapeNdx;
- key->color_ndx = kWire[k].colorNdx;
+ memcpy(key->name.name, kWire->name, XkbKeyNameLength);
+ key->gap = kWire->gap;
+ key->shape_ndx = kWire->shapeNdx;
+ key->color_ndx = kWire->colorNdx;
if (key->shape_ndx >= geom->num_shapes) {
client->errorValue = _XkbErrCode3(0x10, key->shape_ndx,
geom->num_shapes);
@@ -5389,7 +5389,7 @@ _CheckSetSections(XkbGeometryPtr geom,
return BadMatch;
}
}
- rWire = (xkbRowWireDesc *) &kWire[rWire->nKeys];
+ rWire = (xkbRowWireDesc *)kWire;
}
wire = (char *) rWire;
if (sWire->nDoodads > 0) {
@@ -5454,16 +5454,16 @@ _CheckSetShapes(XkbGeometryPtr geom,
return BadAlloc;
ol->corner_radius = olWire->cornerRadius;
ptWire = (xkbPointWireDesc *) &olWire[1];
- for (p = 0, pt = ol->points; p < olWire->nPoints; p++, pt++) {
- pt->x = ptWire[p].x;
- pt->y = ptWire[p].y;
+ for (p = 0, pt = ol->points; p < olWire->nPoints; p++, pt++, ptWire++) {
+ pt->x = ptWire->x;
+ pt->y = ptWire->y;
if (client->swapped) {
swaps(&pt->x);
swaps(&pt->y);
}
}
ol->num_points = olWire->nPoints;
- olWire = (xkbOutlineWireDesc *) (&ptWire[olWire->nPoints]);
+ olWire = (xkbOutlineWireDesc *)ptWire;
}
if (shapeWire->primaryNdx != XkbNoShape)
shape->primary = &shape->outlines[shapeWire->primaryNdx];
--
2.30.2
debian/patches/09_xkb-add-request-length-validation-for-XkbSetGeometry.patch 0 → 100644
+ 181
− 0
View file @ 3c658f9b
From 6907b6ea2b4ce949cb07271f5b678d5966d9df42 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 5 Jul 2022 11:11:06 +1000
Subject: [PATCH] xkb: add request length validation for XkbSetGeometry
No validation of the various fields on that report were done, so a
malicious client could send a short request that claims it had N
sections, or rows, or keys, and the server would process the request for
N sections, running out of bounds of the actual request data.
Fix this by adding size checks to ensure our data is valid.
ZDI-CAN 16062, CVE-2022-2319.
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
xkb/xkb.c | 43 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 38 insertions(+), 5 deletions(-)
diff --git a/xkb/xkb.c b/xkb/xkb.c
index 34b2c290b..4692895db 100644
--- a/xkb/xkb.c
+++ b/xkb/xkb.c
@@ -5156,7 +5156,7 @@ _GetCountedString(char **wire_inout, ClientPtr client, char **str)
}
static Status
-_CheckSetDoodad(char **wire_inout,
+_CheckSetDoodad(char **wire_inout, xkbSetGeometryReq *req,
XkbGeometryPtr geom, XkbSectionPtr section, ClientPtr client)
{
char *wire;
@@ -5167,6 +5167,9 @@ _CheckSetDoodad(char **wire_inout,
Status status;
dWire = (xkbDoodadWireDesc *) (*wire_inout);
+ if (!_XkbCheckRequestBounds(client, req, dWire, dWire + 1))
+ return BadLength;
+
any = dWire->any;
wire = (char *) &dWire[1];
if (client->swapped) {
@@ -5269,7 +5272,7 @@ _CheckSetDoodad(char **wire_inout,
}
static Status
-_CheckSetOverlay(char **wire_inout,
+_CheckSetOverlay(char **wire_inout, xkbSetGeometryReq *req,
XkbGeometryPtr geom, XkbSectionPtr section, ClientPtr client)
{
register int r;
@@ -5280,6 +5283,9 @@ _CheckSetOverlay(char **wire_inout,
wire = *wire_inout;
olWire = (xkbOverlayWireDesc *) wire;
+ if (!_XkbCheckRequestBounds(client, req, olWire, olWire + 1))
+ return BadLength;
+
if (client->swapped) {
swapl(&olWire->name);
}
@@ -5291,6 +5297,9 @@ _CheckSetOverlay(char **wire_inout,
xkbOverlayKeyWireDesc *kWire;
XkbOverlayRowPtr row;
+ if (!_XkbCheckRequestBounds(client, req, rWire, rWire + 1))
+ return BadLength;
+
if (rWire->rowUnder > section->num_rows) {
client->errorValue = _XkbErrCode4(0x20, r, section->num_rows,
rWire->rowUnder);
@@ -5299,6 +5308,9 @@ _CheckSetOverlay(char **wire_inout,
row = XkbAddGeomOverlayRow(ol, rWire->rowUnder, rWire->nKeys);
kWire = (xkbOverlayKeyWireDesc *) &rWire[1];
for (k = 0; k < rWire->nKeys; k++, kWire++) {
+ if (!_XkbCheckRequestBounds(client, req, kWire, kWire + 1))
+ return BadLength;
+
if (XkbAddGeomOverlayKey(ol, row,
(char *) kWire->over,
(char *) kWire->under) == NULL) {
@@ -5332,6 +5344,9 @@ _CheckSetSections(XkbGeometryPtr geom,
register int r;
xkbRowWireDesc *rWire;
+ if (!_XkbCheckRequestBounds(client, req, sWire, sWire + 1))
+ return BadLength;
+
if (client->swapped) {
swapl(&sWire->name);
swaps(&sWire->top);
@@ -5357,6 +5372,9 @@ _CheckSetSections(XkbGeometryPtr geom,
XkbRowPtr row;
xkbKeyWireDesc *kWire;
+ if (!_XkbCheckRequestBounds(client, req, rWire, rWire + 1))
+ return BadLength;
+
if (client->swapped) {
swaps(&rWire->top);
swaps(&rWire->left);
@@ -5371,6 +5389,9 @@ _CheckSetSections(XkbGeometryPtr geom,
for (k = 0; k < rWire->nKeys; k++, kWire++) {
XkbKeyPtr key;
+ if (!_XkbCheckRequestBounds(client, req, kWire, kWire + 1))
+ return BadLength;
+
key = XkbAddGeomKey(row);
if (!key)
return BadAlloc;
@@ -5396,7 +5417,7 @@ _CheckSetSections(XkbGeometryPtr geom,
register int d;
for (d = 0; d < sWire->nDoodads; d++) {
- status = _CheckSetDoodad(&wire, geom, section, client);
+ status = _CheckSetDoodad(&wire, req, geom, section, client);
if (status != Success)
return status;
}
@@ -5405,7 +5426,7 @@ _CheckSetSections(XkbGeometryPtr geom,
register int o;
for (o = 0; o < sWire->nOverlays; o++) {
- status = _CheckSetOverlay(&wire, geom, section, client);
+ status = _CheckSetOverlay(&wire, req, geom, section, client);
if (status != Success)
return status;
}
@@ -5439,6 +5460,9 @@ _CheckSetShapes(XkbGeometryPtr geom,
xkbOutlineWireDesc *olWire;
XkbOutlinePtr ol;
+ if (!_XkbCheckRequestBounds(client, req, shapeWire, shapeWire + 1))
+ return BadLength;
+
shape =
XkbAddGeomShape(geom, shapeWire->name, shapeWire->nOutlines);
if (!shape)
@@ -5449,12 +5473,18 @@ _CheckSetShapes(XkbGeometryPtr geom,
XkbPointPtr pt;
xkbPointWireDesc *ptWire;
+ if (!_XkbCheckRequestBounds(client, req, olWire, olWire + 1))
+ return BadLength;
+
ol = XkbAddGeomOutline(shape, olWire->nPoints);
if (!ol)
return BadAlloc;
ol->corner_radius = olWire->cornerRadius;
ptWire = (xkbPointWireDesc *) &olWire[1];
for (p = 0, pt = ol->points; p < olWire->nPoints; p++, pt++, ptWire++) {
+ if (!_XkbCheckRequestBounds(client, req, ptWire, ptWire + 1))
+ return BadLength;
+
pt->x = ptWire->x;
pt->y = ptWire->y;
if (client->swapped) {
@@ -5560,12 +5590,15 @@ _CheckSetGeom(XkbGeometryPtr geom, xkbSetGeometryReq * req, ClientPtr client)
return status;
for (i = 0; i < req->nDoodads; i++) {
- status = _CheckSetDoodad(&wire, geom, NULL, client);
+ status = _CheckSetDoodad(&wire, req, geom, NULL, client);
if (status != Success)
return status;
}
for (i = 0; i < req->nKeyAliases; i++) {
+ if (!_XkbCheckRequestBounds(client, req, wire, wire + XkbKeyNameLength))
+ return BadLength;
+
if (XkbAddGeomKeyAlias(geom, &wire[XkbKeyNameLength], wire) == NULL)
return BadAlloc;
wire += 2 * XkbKeyNameLength;
--
2.30.2
debian/patches/10_xkb-swap-XkbSetDeviceInfo-and-XkbSetDeviceInfoCheck.patch 0 → 100644
+ 178
− 0
View file @ 3c658f9b
From dd8caf39e9e15d8f302e54045dd08d8ebf1025dc Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Tue, 5 Jul 2022 09:50:41 +1000
Subject: [PATCH] xkb: swap XkbSetDeviceInfo and XkbSetDeviceInfoCheck
XKB often uses a FooCheck and Foo function pair, the former is supposed
to check all values in the request and error out on BadLength,
BadValue, etc. The latter is then called once we're confident the values
are good (they may still fail on an individual device, but that's a
different topic).
In the case of XkbSetDeviceInfo, those functions were incorrectly
named, with XkbSetDeviceInfo ending up as the checker function and
XkbSetDeviceInfoCheck as the setter function. As a result, the setter
function was called before the checker function, accessing request
data and modifying device state before we ensured that the data is
valid.
In particular, the setter function relied on values being already
byte-swapped. This in turn could lead to potential OOB memory access.
Fix this by correctly naming the functions and moving the length checks
over to the checker function. These were added in 87c64fc5b0 to the
wrong function, probably due to the incorrect naming.
Fixes ZDI-CAN 16070, CVE-2022-2320.
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Introduced in c06e27b2f6fd9f7b9f827623a48876a225264132
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
xkb/xkb.c | 46 +++++++++++++++++++++++++---------------------
1 file changed, 25 insertions(+), 21 deletions(-)
diff --git a/xkb/xkb.c b/xkb/xkb.c
index 64e52611e..34b2c290b 100644
--- a/xkb/xkb.c
+++ b/xkb/xkb.c
@@ -6550,7 +6550,8 @@ ProcXkbGetDeviceInfo(ClientPtr client)
static char *
CheckSetDeviceIndicators(char *wire,
DeviceIntPtr dev,
- int num, int *status_rtrn, ClientPtr client)
+ int num, int *status_rtrn, ClientPtr client,
+ xkbSetDeviceInfoReq * stuff)
{
xkbDeviceLedsWireDesc *ledWire;
int i;
@@ -6558,6 +6559,11 @@ CheckSetDeviceIndicators(char *wire,
ledWire = (xkbDeviceLedsWireDesc *) wire;
for (i = 0; i < num; i++) {
+ if (!_XkbCheckRequestBounds(client, stuff, ledWire, ledWire + 1)) {
+ *status_rtrn = BadLength;
+ return (char *) ledWire;
+ }
+
if (client->swapped) {
swaps(&ledWire->ledClass);
swaps(&ledWire->ledID);
@@ -6585,6 +6591,11 @@ CheckSetDeviceIndicators(char *wire,
atomWire = (CARD32 *) &ledWire[1];
if (nNames > 0) {
for (n = 0; n < nNames; n++) {
+ if (!_XkbCheckRequestBounds(client, stuff, atomWire, atomWire + 1)) {
+ *status_rtrn = BadLength;
+ return (char *) atomWire;
+ }
+
if (client->swapped) {
swapl(atomWire);
}
@@ -6596,6 +6607,10 @@ CheckSetDeviceIndicators(char *wire,
mapWire = (xkbIndicatorMapWireDesc *) atomWire;
if (nMaps > 0) {
for (n = 0; n < nMaps; n++) {
+ if (!_XkbCheckRequestBounds(client, stuff, mapWire, mapWire + 1)) {
+ *status_rtrn = BadLength;
+ return (char *) mapWire;
+ }
if (client->swapped) {
swaps(&mapWire->virtualMods);
swapl(&mapWire->ctrls);
@@ -6647,11 +6662,6 @@ SetDeviceIndicators(char *wire,
xkbIndicatorMapWireDesc *mapWire;
XkbSrvLedInfoPtr sli;
- if (!_XkbCheckRequestBounds(client, stuff, ledWire, ledWire + 1)) {
- *status_rtrn = BadLength;
- return (char *) ledWire;
- }
-
namec = mapc = statec = 0;
sli = XkbFindSrvLedInfo(dev, ledWire->ledClass, ledWire->ledID,
XkbXI_IndicatorMapsMask);
@@ -6670,10 +6680,6 @@ SetDeviceIndicators(char *wire,
memset((char *) sli->names, 0, XkbNumIndicators * sizeof(Atom));
for (n = 0, bit = 1; n < XkbNumIndicators; n++, bit <<= 1) {
if (ledWire->namesPresent & bit) {
- if (!_XkbCheckRequestBounds(client, stuff, atomWire, atomWire + 1)) {
- *status_rtrn = BadLength;
- return (char *) atomWire;
- }
sli->names[n] = (Atom) *atomWire;
if (sli->names[n] == None)
ledWire->namesPresent &= ~bit;
@@ -6691,10 +6697,6 @@ SetDeviceIndicators(char *wire,
if (ledWire->mapsPresent) {
for (n = 0, bit = 1; n < XkbNumIndicators; n++, bit <<= 1) {
if (ledWire->mapsPresent & bit) {
- if (!_XkbCheckRequestBounds(client, stuff, mapWire, mapWire + 1)) {
- *status_rtrn = BadLength;
- return (char *) mapWire;
- }
sli->maps[n].flags = mapWire->flags;
sli->maps[n].which_groups = mapWire->whichGroups;
sli->maps[n].groups = mapWire->groups;
@@ -6730,13 +6732,17 @@ SetDeviceIndicators(char *wire,
}
static int
-_XkbSetDeviceInfo(ClientPtr client, DeviceIntPtr dev,
+_XkbSetDeviceInfoCheck(ClientPtr client, DeviceIntPtr dev,
xkbSetDeviceInfoReq * stuff)
{
char *wire;
wire = (char *) &stuff[1];
if (stuff->change & XkbXI_ButtonActionsMask) {
+ int sz = stuff->nBtns * SIZEOF(xkbActionWireDesc);
+ if (!_XkbCheckRequestBounds(client, stuff, wire, (char *) wire + sz))
+ return BadLength;
+
if (!dev->button) {
client->errorValue = _XkbErrCode2(XkbErr_BadClass, ButtonClass);
return XkbKeyboardErrorCode;
@@ -6747,13 +6753,13 @@ _XkbSetDeviceInfo(ClientPtr client, DeviceIntPtr dev,
dev->button->numButtons);
return BadMatch;
}
- wire += (stuff->nBtns * SIZEOF(xkbActionWireDesc));
+ wire += sz;
}
if (stuff->change & XkbXI_IndicatorsMask) {
int status = Success;
wire = CheckSetDeviceIndicators(wire, dev, stuff->nDeviceLedFBs,
- &status, client);
+ &status, client, stuff);
if (status != Success)
return status;
}
@@ -6764,8 +6770,8 @@ _XkbSetDeviceInfo(ClientPtr client, DeviceIntPtr dev,
}
static int
-_XkbSetDeviceInfoCheck(ClientPtr client, DeviceIntPtr dev,
- xkbSetDeviceInfoReq * stuff)
+_XkbSetDeviceInfo(ClientPtr client, DeviceIntPtr dev,
+ xkbSetDeviceInfoReq * stuff)
{
char *wire;
xkbExtensionDeviceNotify ed;
@@ -6789,8 +6795,6 @@ _XkbSetDeviceInfoCheck(ClientPtr client, DeviceIntPtr dev,
if (stuff->firstBtn + stuff->nBtns > nBtns)
return BadValue;
sz = stuff->nBtns * SIZEOF(xkbActionWireDesc);
- if (!_XkbCheckRequestBounds(client, stuff, wire, (char *) wire + sz))
- return BadLength;
memcpy((char *) &acts[stuff->firstBtn], (char *) wire, sz);
wire += sz;
ed.reason |= XkbXI_ButtonActionsMask;
--
2.30.2
debian/patches/series
+ 3
− 0
View file @ 3c658f9b
......@@ -7,3 +7,6 @@
05_Revert-Unload-submodules.diff
06_use-intel-only-on-pre-gen4.diff
07_use-modesetting-driver-by-default-on-GeForce.diff
08_xkb-switch-to-array-index-loops-to-moving-pointers.patch
09_xkb-add-request-length-validation-for-XkbSetGeometry.patch
10_xkb-swap-XkbSetDeviceInfo-and-XkbSetDeviceInfoCheck.patch
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