Commit d7d34747 authored by Leo's avatar Leo
Browse files

main/libx11: fix CVE-2021-31535

parent 21152dff
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
pkgname=libx11
pkgver=1.6.12
pkgrel=0
pkgrel=1
pkgdesc="X11 client-side library"
url="http://xorg.freedesktop.org/"
arch="all"
......@@ -9,11 +9,14 @@ license="custom:XFREE86"
subpackages="$pkgname-static $pkgname-dev $pkgname-doc"
depends_dev="libxcb-dev xtrans"
makedepends="$depends_dev xorgproto util-macros xmlto"
source="https://www.x.org/releases/individual/lib/libX11-$pkgver.tar.bz2"
source="https://www.x.org/releases/individual/lib/libX11-$pkgver.tar.bz2
CVE-2021-31535.patch
"
builddir="$srcdir"/libX11-$pkgver
# secfixes:
# 1.6.12-r1:
# - CVE-2021-31535
# 1.6.12-r0:
# - CVE-2020-14363
# 1.6.10-r0:
......@@ -47,4 +50,7 @@ package() {
install -Dm644 COPYING "$pkgdir"/usr/share/licenses/$pkgname/COPYING
}
sha512sums="79df7d61d9009b0dd3b65f67a62189aa0a43799c01026b3d2d534092596a0b67f246af5e398a89eb1ccc61a27335f81be8262b8a39768a76f62d862cd7415a47 libX11-1.6.12.tar.bz2"
sha512sums="
79df7d61d9009b0dd3b65f67a62189aa0a43799c01026b3d2d534092596a0b67f246af5e398a89eb1ccc61a27335f81be8262b8a39768a76f62d862cd7415a47 libX11-1.6.12.tar.bz2
6b4b6c58eacda10cb521b122ff0f1563e70b185739d578dbba3d010e20ebcd4d1a3dce1bcf868e23eefc94155d63b91129a571882ceaa7372dcffd8db339bbea CVE-2021-31535.patch
"
From 8d2e02ae650f00c4a53deb625211a0527126c605 Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@herrb.eu>
Date: Fri, 19 Feb 2021 15:30:39 +0100
Subject: [PATCH] Reject string longer than USHRT_MAX before sending them on
the wire
The X protocol uses CARD16 values to represent the length so
this would overflow.
CVE-2021-31535
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
---
src/Font.c | 4 +++-
src/FontInfo.c | 3 +++
src/FontNames.c | 3 +++
src/GetColor.c | 4 ++++
src/LoadFont.c | 4 ++++
src/LookupCol.c | 6 ++++--
src/ParseCol.c | 3 +++
src/QuExt.c | 5 +++++
src/SetFPath.c | 6 ++++++
src/SetHints.c | 7 +++++++
src/StNColor.c | 3 +++
src/StName.c | 7 ++++++-
12 files changed, 51 insertions(+), 4 deletions(-)
diff --git a/src/Font.c b/src/Font.c
index d4ebdaca..1cd89cca 100644
--- a/src/Font.c
+++ b/src/Font.c
@@ -102,6 +102,8 @@ XFontStruct *XLoadQueryFont(
XF86BigfontCodes *extcodes = _XF86BigfontCodes(dpy);
#endif
+ if (strlen(name) >= USHRT_MAX)
+ return NULL;
if (_XF86LoadQueryLocaleFont(dpy, name, &font_result, (Font *)0))
return font_result;
LockDisplay(dpy);
@@ -663,7 +665,7 @@ int _XF86LoadQueryLocaleFont(
if (!name)
return 0;
l = (int) strlen(name);
- if (l < 2 || name[l - 1] != '*' || name[l - 2] != '-')
+ if (l < 2 || name[l - 1] != '*' || name[l - 2] != '-' || l >= USHRT_MAX)
return 0;
charset = NULL;
/* next three lines stolen from _XkbGetCharset() */
diff --git a/src/FontInfo.c b/src/FontInfo.c
index 694efa10..6644b3fa 100644
--- a/src/FontInfo.c
+++ b/src/FontInfo.c
@@ -58,6 +58,9 @@ XFontStruct **info) /* RETURN */
register xListFontsReq *req;
int j;
+ if (strlen(pattern) >= USHRT_MAX)
+ return NULL;
+
LockDisplay(dpy);
GetReq(ListFontsWithInfo, req);
req->maxNames = maxNames;
diff --git a/src/FontNames.c b/src/FontNames.c
index 30912925..458d80c9 100644
--- a/src/FontNames.c
+++ b/src/FontNames.c
@@ -51,6 +51,9 @@ int *actualCount) /* RETURN */
register xListFontsReq *req;
unsigned long rlen = 0;
+ if (strlen(pattern) >= USHRT_MAX)
+ return NULL;
+
LockDisplay(dpy);
GetReq(ListFonts, req);
req->maxNames = maxNames;
diff --git a/src/GetColor.c b/src/GetColor.c
index d088497f..c8178067 100644
--- a/src/GetColor.c
+++ b/src/GetColor.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <stdio.h>
#include "Xlibint.h"
#include "Xcmsint.h"
@@ -48,6 +49,9 @@ XColor *exact_def) /* RETURN */
XcmsColor cmsColor_exact;
Status ret;
+ if (strlen(colorname) >= USHRT_MAX)
+ return (0);
+
#ifdef XCMS
/*
* Let's Attempt to use Xcms and i18n approach to Parse Color
diff --git a/src/LoadFont.c b/src/LoadFont.c
index 0a3809a8..3996436f 100644
--- a/src/LoadFont.c
+++ b/src/LoadFont.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include "Xlibint.h"
Font
@@ -38,6 +39,9 @@ XLoadFont (
Font fid;
register xOpenFontReq *req;
+ if (strlen(name) >= USHRT_MAX)
+ return (0);
+
if (_XF86LoadQueryLocaleFont(dpy, name, (XFontStruct **)0, &fid))
return fid;
diff --git a/src/LookupCol.c b/src/LookupCol.c
index 9608d512..cd9b1368 100644
--- a/src/LookupCol.c
+++ b/src/LookupCol.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <stdio.h>
#include "Xlibint.h"
#include "Xcmsint.h"
@@ -46,6 +47,9 @@ XLookupColor (
XcmsCCC ccc;
XcmsColor cmsColor_exact;
+ n = (int) strlen (spec);
+ if (n >= USHRT_MAX)
+ return 0;
#ifdef XCMS
/*
* Let's Attempt to use Xcms and i18n approach to Parse Color
@@ -77,8 +81,6 @@ XLookupColor (
* Xcms and i18n methods failed, so lets pass it to the server
* for parsing.
*/
-
- n = (int) strlen (spec);
LockDisplay(dpy);
GetReq (LookupColor, req);
req->cmap = cmap;
diff --git a/src/ParseCol.c b/src/ParseCol.c
index 2691df36..7a84a17b 100644
--- a/src/ParseCol.c
+++ b/src/ParseCol.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <stdio.h>
#include "Xlibint.h"
#include "Xcmsint.h"
@@ -47,6 +48,8 @@ XParseColor (
if (!spec) return(0);
n = (int) strlen (spec);
+ if (n >= USHRT_MAX)
+ return(0);
if (*spec == '#') {
/*
* RGB
diff --git a/src/QuExt.c b/src/QuExt.c
index 2021dca4..4cb99fcf 100644
--- a/src/QuExt.c
+++ b/src/QuExt.c
@@ -27,6 +27,8 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
+#include <stdbool.h>
#include "Xlibint.h"
Bool
@@ -40,6 +42,9 @@ XQueryExtension(
xQueryExtensionReply rep;
register xQueryExtensionReq *req;
+ if (strlen(name) >= USHRT_MAX)
+ return false;
+
LockDisplay(dpy);
GetReq(QueryExtension, req);
req->nbytes = name ? (CARD16) strlen(name) : 0;
diff --git a/src/SetFPath.c b/src/SetFPath.c
index 7d12f18c..13fce49e 100644
--- a/src/SetFPath.c
+++ b/src/SetFPath.c
@@ -26,6 +26,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
+#include <limits.h>
#endif
#include "Xlibint.h"
@@ -49,6 +50,11 @@ XSetFontPath (
req->nFonts = ndirs;
for (i = 0; i < ndirs; i++) {
n = (int) ((size_t) n + (safestrlen (directories[i]) + 1));
+ if (n >= USHRT_MAX) {
+ UnlockDisplay(dpy);
+ SyncHandle();
+ return 0;
+ }
}
nbytes = (n + 3) & ~3;
req->length += nbytes >> 2;
diff --git a/src/SetHints.c b/src/SetHints.c
index e81aa9d3..61cb0684 100644
--- a/src/SetHints.c
+++ b/src/SetHints.c
@@ -49,6 +49,7 @@ SOFTWARE.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <X11/Xlibint.h>
#include <X11/Xutil.h>
#include "Xatomtype.h"
@@ -214,6 +215,8 @@ XSetCommand (
register char *buf, *bp;
for (i = 0, nbytes = 0; i < argc; i++) {
nbytes += safestrlen(argv[i]) + 1;
+ if (nbytes >= USHRT_MAX)
+ return 1;
}
if ((bp = buf = Xmalloc(nbytes))) {
/* copy arguments into single buffer */
@@ -256,6 +259,8 @@ XSetStandardProperties (
if (name != NULL) XStoreName (dpy, w, name);
+ if (safestrlen(icon_string) >= USHRT_MAX)
+ return 1;
if (icon_string != NULL) {
XChangeProperty (dpy, w, XA_WM_ICON_NAME, XA_STRING, 8,
PropModeReplace,
@@ -298,6 +303,8 @@ XSetClassHint(
len_nm = safestrlen(classhint->res_name);
len_cl = safestrlen(classhint->res_class);
+ if (len_nm + len_cl >= USHRT_MAX)
+ return 1;
if ((class_string = s = Xmalloc(len_nm + len_cl + 2))) {
if (len_nm) {
strcpy(s, classhint->res_name);
diff --git a/src/StNColor.c b/src/StNColor.c
index 3b50401b..16dc9cbc 100644
--- a/src/StNColor.c
+++ b/src/StNColor.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <stdio.h>
#include "Xlibint.h"
#include "Xcmsint.h"
@@ -46,6 +47,8 @@ int flags) /* DoRed, DoGreen, DoBlue */
XcmsColor cmsColor_exact;
XColor scr_def;
+ if (strlen(name) >= USHRT_MAX)
+ return 0;
#ifdef XCMS
/*
* Let's Attempt to use Xcms approach to Parse Color
diff --git a/src/StName.c b/src/StName.c
index 58b5a5a6..04bb3aa6 100644
--- a/src/StName.c
+++ b/src/StName.c
@@ -27,6 +27,7 @@ in this Software without prior written authorization from The Open Group.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
#include <X11/Xlibint.h>
#include <X11/Xatom.h>
@@ -36,7 +37,9 @@ XStoreName (
Window w,
_Xconst char *name)
{
- return XChangeProperty(dpy, w, XA_WM_NAME, XA_STRING,
+ if (strlen(name) >= USHRT_MAX)
+ return 0;
+ return XChangeProperty(dpy, w, XA_WM_NAME, XA_STRING, /* */
8, PropModeReplace, (_Xconst unsigned char *)name,
name ? (int) strlen(name) : 0);
}
@@ -47,6 +50,8 @@ XSetIconName (
Window w,
_Xconst char *icon_name)
{
+ if (strlen(icon_name) >= USHRT_MAX)
+ return 0;
return XChangeProperty(dpy, w, XA_WM_ICON_NAME, XA_STRING, 8,
PropModeReplace, (_Xconst unsigned char *)icon_name,
icon_name ? (int) strlen(icon_name) : 0);
--
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