mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-15 19:35:25 -05:00
13c10b4ca4
* gnu/packages/patches/libx11-CVE-2016-7942.patch, gnu/packages/patches/libx11-CVE-2016-7943.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/xorg.scm (libx11)[replacement]: New field. (libx11/fixed): New variable.
113 lines
3.4 KiB
Diff
113 lines
3.4 KiB
Diff
Fix CVE-2016-7943:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7943.
|
|
|
|
Patch copied from upstream source repository:
|
|
|
|
https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9
|
|
|
|
From 8c29f1607a31dac0911e45a0dd3d74173822b3c9 Mon Sep 17 00:00:00 2001
|
|
From: Tobias Stoeckmann <tobias@stoeckmann.org>
|
|
Date: Sun, 25 Sep 2016 21:22:57 +0200
|
|
Subject: [PATCH] The validation of server responses avoids out of boundary
|
|
accesses.
|
|
|
|
v2: FontNames.c return a NULL list whenever a single
|
|
length field from the server is incohent.
|
|
|
|
Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
|
|
Reviewed-by: Matthieu Herrb <matthieu@herrb.eu>
|
|
---
|
|
src/FontNames.c | 23 +++++++++++++++++------
|
|
src/ListExt.c | 12 ++++++++----
|
|
src/ModMap.c | 3 ++-
|
|
3 files changed, 27 insertions(+), 11 deletions(-)
|
|
|
|
diff --git a/src/FontNames.c b/src/FontNames.c
|
|
index 21dcafe..e55f338 100644
|
|
--- a/src/FontNames.c
|
|
+++ b/src/FontNames.c
|
|
@@ -66,7 +66,7 @@ int *actualCount) /* RETURN */
|
|
|
|
if (rep.nFonts) {
|
|
flist = Xmalloc (rep.nFonts * sizeof(char *));
|
|
- if (rep.length < (INT_MAX >> 2)) {
|
|
+ if (rep.length > 0 && rep.length < (INT_MAX >> 2)) {
|
|
rlen = rep.length << 2;
|
|
ch = Xmalloc(rlen + 1);
|
|
/* +1 to leave room for last null-terminator */
|
|
@@ -93,11 +93,22 @@ int *actualCount) /* RETURN */
|
|
if (ch + length < chend) {
|
|
flist[i] = ch + 1; /* skip over length */
|
|
ch += length + 1; /* find next length ... */
|
|
- length = *(unsigned char *)ch;
|
|
- *ch = '\0'; /* and replace with null-termination */
|
|
- count++;
|
|
- } else
|
|
- flist[i] = NULL;
|
|
+ if (ch <= chend) {
|
|
+ length = *(unsigned char *)ch;
|
|
+ *ch = '\0'; /* and replace with null-termination */
|
|
+ count++;
|
|
+ } else {
|
|
+ Xfree(flist);
|
|
+ flist = NULL;
|
|
+ count = 0;
|
|
+ break;
|
|
+ }
|
|
+ } else {
|
|
+ Xfree(flist);
|
|
+ flist = NULL;
|
|
+ count = 0;
|
|
+ break;
|
|
+ }
|
|
}
|
|
}
|
|
*actualCount = count;
|
|
diff --git a/src/ListExt.c b/src/ListExt.c
|
|
index be6b989..0516e45 100644
|
|
--- a/src/ListExt.c
|
|
+++ b/src/ListExt.c
|
|
@@ -55,7 +55,7 @@ char **XListExtensions(
|
|
|
|
if (rep.nExtensions) {
|
|
list = Xmalloc (rep.nExtensions * sizeof (char *));
|
|
- if (rep.length < (INT_MAX >> 2)) {
|
|
+ if (rep.length > 0 && rep.length < (INT_MAX >> 2)) {
|
|
rlen = rep.length << 2;
|
|
ch = Xmalloc (rlen + 1);
|
|
/* +1 to leave room for last null-terminator */
|
|
@@ -80,9 +80,13 @@ char **XListExtensions(
|
|
if (ch + length < chend) {
|
|
list[i] = ch+1; /* skip over length */
|
|
ch += length + 1; /* find next length ... */
|
|
- length = *ch;
|
|
- *ch = '\0'; /* and replace with null-termination */
|
|
- count++;
|
|
+ if (ch <= chend) {
|
|
+ length = *ch;
|
|
+ *ch = '\0'; /* and replace with null-termination */
|
|
+ count++;
|
|
+ } else {
|
|
+ list[i] = NULL;
|
|
+ }
|
|
} else
|
|
list[i] = NULL;
|
|
}
|
|
diff --git a/src/ModMap.c b/src/ModMap.c
|
|
index a809aa2..49a5d08 100644
|
|
--- a/src/ModMap.c
|
|
+++ b/src/ModMap.c
|
|
@@ -42,7 +42,8 @@ XGetModifierMapping(register Display *dpy)
|
|
GetEmptyReq(GetModifierMapping, req);
|
|
(void) _XReply (dpy, (xReply *)&rep, 0, xFalse);
|
|
|
|
- if (rep.length < (INT_MAX >> 2)) {
|
|
+ if (rep.length < (INT_MAX >> 2) &&
|
|
+ (rep.length >> 1) == rep.numKeyPerModifier) {
|
|
nbytes = (unsigned long)rep.length << 2;
|
|
res = Xmalloc(sizeof (XModifierKeymap));
|
|
if (res)
|
|
--
|
|
2.10.1
|
|
|