mirrors/poky
1
0
Fork 0
mirror of https://git.yoctoproject.org/poky synced 2026-04-14 17:02:22 +02:00
Code Issues Packages Projects Releases Wiki Activity

xorg: Security fix for CVE-2020-14345

Browse Source 
Source: freedesktop.org
MR: 105894
Type: Security Fix
Disposition: Backport from f7cd1276bb
ChangeID: 2c6b7553d8e5bc152258ad1794d95cb7d8b215eb
Description:

CVE-2020-14345 fix

(From OE-Core rev: 16e30186afd13650407c67a2f6a598412f214bd1)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Armin Kuster
2021-01-14 10:15:12 -08:00
committed by Richard Purdie
parent d5a1834e4f
commit 26ebdf3f4f
2 changed files with 183 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

182
meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2020-14345.patch Normal file
View File

@@ -0,0 +1,182 @@
From f7cd1276bbd4fe3a9700096dec33b52b8440788d Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@herrb.eu>
Date: Tue, 18 Aug 2020 14:46:32 +0200
Subject: [PATCH] Correct bounds checking in XkbSetNames()
CVE-2020-14345 / ZDI 11428
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
Upstream-Status: Backport
CVE: CVE-2020-14345
Affects < 1.20.9
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
xkb/xkb.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
Index: xorg-server-1.20.8/xkb/xkb.c
===================================================================
--- xorg-server-1.20.8.orig/xkb/xkb.c
+++ xorg-server-1.20.8/xkb/xkb.c
@@ -152,6 +152,19 @@ static RESTYPE RT_XKBCLIENT;
#define CHK_REQ_KEY_RANGE(err,first,num,r) \
CHK_REQ_KEY_RANGE2(err,first,num,r,client->errorValue,BadValue)
+static Bool
+_XkbCheckRequestBounds(ClientPtr client, void *stuff, void *from, void *to) {
+ char *cstuff = (char *)stuff;
+ char *cfrom = (char *)from;
+ char *cto = (char *)to;
+
+ return cfrom < cto &&
+ cfrom >= cstuff &&
+ cfrom < cstuff + ((size_t)client->req_len << 2) &&
+ cto >= cstuff &&
+ cto <= cstuff + ((size_t)client->req_len << 2);
+}
+
/***====================================================================***/
int
@@ -4045,6 +4058,8 @@ _XkbSetNamesCheck(ClientPtr client, Devi
client->errorValue = _XkbErrCode2(0x04, stuff->firstType);
return BadAccess;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + stuff->nTypes))
+ return BadLength;
old = tmp;
tmp = _XkbCheckAtoms(tmp, stuff->nTypes, client->swapped, &bad);
if (!tmp) {
@@ -4074,6 +4089,8 @@ _XkbSetNamesCheck(ClientPtr client, Devi
}
width = (CARD8 *) tmp;
tmp = (CARD32 *) (((char *) tmp) + XkbPaddedSize(stuff->nKTLevels));
+ if (!_XkbCheckRequestBounds(client, stuff, width, tmp))
+ return BadLength;
type = &xkb->map->types[stuff->firstKTLevel];
for (i = 0; i < stuff->nKTLevels; i++, type++) {
if (width[i] == 0)
@@ -4083,6 +4100,8 @@ _XkbSetNamesCheck(ClientPtr client, Devi
type->num_levels, width[i]);
return BadMatch;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + width[i]))
+ return BadLength;
tmp = _XkbCheckAtoms(tmp, width[i], client->swapped, &bad);
if (!tmp) {
client->errorValue = bad;
@@ -4095,6 +4114,9 @@ _XkbSetNamesCheck(ClientPtr client, Devi
client->errorValue = 0x08;
return BadMatch;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp,
+ tmp + Ones(stuff->indicators)))
+ return BadLength;
tmp = _XkbCheckMaskedAtoms(tmp, XkbNumIndicators, stuff->indicators,
client->swapped, &bad);
if (!tmp) {
@@ -4107,6 +4129,9 @@ _XkbSetNamesCheck(ClientPtr client, Devi
client->errorValue = 0x09;
return BadMatch;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp,
+ tmp + Ones(stuff->virtualMods)))
+ return BadLength;
tmp = _XkbCheckMaskedAtoms(tmp, XkbNumVirtualMods,
(CARD32) stuff->virtualMods,
client->swapped, &bad);
@@ -4120,6 +4145,9 @@ _XkbSetNamesCheck(ClientPtr client, Devi
client->errorValue = 0x0a;
return BadMatch;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp,
+ tmp + Ones(stuff->groupNames)))
+ return BadLength;
tmp = _XkbCheckMaskedAtoms(tmp, XkbNumKbdGroups,
(CARD32) stuff->groupNames,
client->swapped, &bad);
@@ -4141,9 +4169,14 @@ _XkbSetNamesCheck(ClientPtr client, Devi
stuff->nKeys);
return BadValue;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + stuff->nKeys))
+ return BadLength;
tmp += stuff->nKeys;
}
if ((stuff->which & XkbKeyAliasesMask) && (stuff->nKeyAliases > 0)) {
+ if (!_XkbCheckRequestBounds(client, stuff, tmp,
+ tmp + (stuff->nKeyAliases * 2)))
+ return BadLength;
tmp += stuff->nKeyAliases * 2;
}
if (stuff->which & XkbRGNamesMask) {
@@ -4151,6 +4184,9 @@ _XkbSetNamesCheck(ClientPtr client, Devi
client->errorValue = _XkbErrCode2(0x0d, stuff->nRadioGroups);
return BadValue;
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp,
+ tmp + stuff->nRadioGroups))
+ return BadLength;
tmp = _XkbCheckAtoms(tmp, stuff->nRadioGroups, client->swapped, &bad);
if (!tmp) {
client->errorValue = bad;
@@ -4344,6 +4380,8 @@ ProcXkbSetNames(ClientPtr client)
/* check device-independent stuff */
tmp = (CARD32 *) &stuff[1];
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbKeycodesNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {
@@ -4351,6 +4389,8 @@ ProcXkbSetNames(ClientPtr client)
return BadAtom;
}
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbGeometryNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {
@@ -4358,6 +4398,8 @@ ProcXkbSetNames(ClientPtr client)
return BadAtom;
}
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbSymbolsNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {
@@ -4365,6 +4407,8 @@ ProcXkbSetNames(ClientPtr client)
return BadAtom;
}
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbPhysSymbolsNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {
@@ -4372,6 +4416,8 @@ ProcXkbSetNames(ClientPtr client)
return BadAtom;
}
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbTypesNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {
@@ -4379,6 +4425,8 @@ ProcXkbSetNames(ClientPtr client)
return BadAtom;
}
}
+ if (!_XkbCheckRequestBounds(client, stuff, tmp, tmp + 1))
+ return BadLength;
if (stuff->which & XkbCompatNameMask) {
tmp = _XkbCheckAtoms(tmp, 1, client->swapped, &bad);
if (!tmp) {

1
meta/recipes-graphics/xorg-xserver/xserver-xorg_1.20.8.bb
View File

@@ -9,6 +9,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat
file://CVE-2020-14346.patch \
file://CVE-2020-14361.patch \
file://CVE-2020-14362.patch \
file://CVE-2020-14345.patch \
"
SRC_URI[md5sum] = "a770aec600116444a953ff632f51f839"
SRC_URI[sha256sum] = "d17b646bee4ba0fb7850c1cc55b18e3e8513ed5c02bdf38da7e107f84e2d0146"