untrusted comment: verify with openbsd-66-base.pub
RWSvK/c+cFe24IKqzdwWKqGBinE3AauXTKiJth704sGkdxEPIC2k23ce3MO4TweBnMpElLRAu5/CG0eh4nTF0/gSZ5LppIl5VgA=
OpenBSD 6.6 errata 037, July 31, 2020:
Malformed messages can cause heap corruption in the X Input Method
client implementation in libX11.
Apply by doing:
signify -Vep /etc/signify/openbsd-66-base.pub -x 037_ximcp.patch.sig \
-m - | (cd /usr/xenocara && patch -p0)
And then compile and rebuild the the X11 library
cd /usr/xenocara/lib/libX11
make -f Makefile.bsd-wrapper obj
make -f Makefile.bsd-wrapper build
Index: lib/libX11/modules/im/ximcp/imDefIc.c
===================================================================
RCS file: /cvs/xenocara/lib/libX11/modules/im/ximcp/imDefIc.c,v
retrieving revision 1.11
diff -u -p -r1.11 imDefIc.c
--- lib/libX11/modules/im/ximcp/imDefIc.c 23 Aug 2018 19:38:12 -0000 1.11
+++ lib/libX11/modules/im/ximcp/imDefIc.c 25 Jul 2020 08:48:45 -0000
@@ -350,7 +350,7 @@ _XimProtoGetICValues(
+ sizeof(INT16)
+ XIM_PAD(2 + buf_size);
- if (!(buf = Xmalloc(buf_size)))
+ if (!(buf = Xcalloc(buf_size, 1)))
return arg->name;
buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
@@ -708,6 +708,7 @@ _XimProtoSetICValues(
#endif /* XIM_CONNECTABLE */
_XimGetCurrentICValues(ic, &ic_values);
+ memset(tmp_buf, 0, sizeof(tmp_buf32));
buf = tmp_buf;
buf_size = XIM_HEADER_SIZE
+ sizeof(CARD16) + sizeof(CARD16) + sizeof(INT16) + sizeof(CARD16);
@@ -730,7 +731,7 @@ _XimProtoSetICValues(
buf_size += ret_len;
if (buf == tmp_buf) {
- if (!(tmp = Xmalloc(buf_size + data_len))) {
+ if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
return tmp_name;
}
memcpy(tmp, buf, buf_size);
@@ -740,6 +741,7 @@ _XimProtoSetICValues(
Xfree(buf);
return tmp_name;
}
+ memset(&tmp[buf_size], 0, data_len);
buf = tmp;
}
}
Index: lib/libX11/modules/im/ximcp/imDefIm.c
===================================================================
RCS file: /cvs/xenocara/lib/libX11/modules/im/ximcp/imDefIm.c,v
retrieving revision 1.9
diff -u -p -r1.9 imDefIm.c
--- lib/libX11/modules/im/ximcp/imDefIm.c 4 Aug 2019 13:34:53 -0000 1.9
+++ lib/libX11/modules/im/ximcp/imDefIm.c 25 Jul 2020 08:48:45 -0000
@@ -62,6 +62,7 @@ PERFORMANCE OF THIS SOFTWARE.
#include "XimTrInt.h"
#include "Ximint.h"
+#include <limits.h>
int
_XimCheckDataSize(
@@ -807,12 +808,16 @@ _XimOpen(
int buf_size;
int ret_code;
char *locale_name;
+ size_t locale_len;
locale_name = im->private.proto.locale_name;
- len = strlen(locale_name);
- buf_b[0] = (BYTE)len; /* length of locale name */
- (void)strcpy((char *)&buf_b[1], locale_name); /* locale name */
- len += sizeof(BYTE); /* sizeof length */
+ locale_len = strlen(locale_name);
+ if (locale_len > UCHAR_MAX)
+ return False;
+ memset(buf32, 0, sizeof(buf32));
+ buf_b[0] = (BYTE)locale_len; /* length of locale name */
+ memcpy(&buf_b[1], locale_name, locale_len); /* locale name */
+ len = (INT16)(locale_len + sizeof(BYTE)); /* sizeof length */
XIM_SET_PAD(buf_b, len); /* pad */
_XimSetHeader((XPointer)buf, XIM_OPEN, 0, &len);
@@ -1287,6 +1292,7 @@ _XimProtoSetIMValues(
#endif /* XIM_CONNECTABLE */
_XimGetCurrentIMValues(im, &im_values);
+ memset(tmp_buf, 0, sizeof(tmp_buf32));
buf = tmp_buf;
buf_size = XIM_HEADER_SIZE + sizeof(CARD16) + sizeof(INT16);
data_len = BUFSIZE - buf_size;
@@ -1307,7 +1313,7 @@ _XimProtoSetIMValues(
buf_size += ret_len;
if (buf == tmp_buf) {
- if (!(tmp = Xmalloc(buf_size + data_len))) {
+ if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
return arg->name;
}
memcpy(tmp, buf, buf_size);
@@ -1317,6 +1323,7 @@ _XimProtoSetIMValues(
Xfree(buf);
return arg->name;
}
+ memset(&tmp[buf_size], 0, data_len);
buf = tmp;
}
}
@@ -1458,7 +1465,7 @@ _XimProtoGetIMValues(
+ sizeof(INT16)
+ XIM_PAD(buf_size);
- if (!(buf = Xmalloc(buf_size)))
+ if (!(buf = Xcalloc(buf_size, 1)))
return arg->name;
buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
@@ -1720,7 +1727,7 @@ _XimEncodingNegotiation(
+ sizeof(CARD16)
+ detail_len;
- if (!(buf = Xmalloc(XIM_HEADER_SIZE + len)))
+ if (!(buf = Xcalloc(XIM_HEADER_SIZE + len, 1)))
goto free_detail_ptr;
buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
@@ -1816,6 +1823,7 @@ _XimSendSavedIMValues(
int ret_code;
_XimGetCurrentIMValues(im, &im_values);
+ memset(tmp_buf, 0, sizeof(tmp_buf32));
buf = tmp_buf;
buf_size = XIM_HEADER_SIZE + sizeof(CARD16) + sizeof(INT16);
data_len = BUFSIZE - buf_size;
@@ -1838,7 +1846,7 @@ _XimSendSavedIMValues(
buf_size += ret_len;
if (buf == tmp_buf) {
- if (!(tmp = Xmalloc(buf_size + data_len))) {
+ if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
return False;
}
memcpy(tmp, buf, buf_size);
@@ -1848,6 +1856,7 @@ _XimSendSavedIMValues(
Xfree(buf);
return False;
}
+ memset(&tmp[buf_size], 0, data_len);
buf = tmp;
}
}
Index: lib/libX11/modules/im/ximcp/imRmAttr.c
===================================================================
RCS file: /cvs/xenocara/lib/libX11/modules/im/ximcp/imRmAttr.c,v
retrieving revision 1.9
diff -u -p -r1.9 imRmAttr.c
--- lib/libX11/modules/im/ximcp/imRmAttr.c 6 Apr 2015 20:57:56 -0000 1.9
+++ lib/libX11/modules/im/ximcp/imRmAttr.c 25 Jul 2020 08:48:45 -0000
@@ -29,6 +29,8 @@ PERFORMANCE OF THIS SOFTWARE.
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
+#include <limits.h>
+
#include "Xlibint.h"
#include "Xlcint.h"
#include "Ximint.h"
@@ -214,7 +216,7 @@ _XimAttributeToValue(
Xic ic,
XIMResourceList res,
CARD16 *data,
- INT16 data_len,
+ CARD16 data_len,
XPointer value,
BITMASK32 mode)
{
@@ -250,18 +252,24 @@ _XimAttributeToValue(
case XimType_XIMStyles:
{
- INT16 num = data[0];
+ CARD16 num = data[0];
register CARD32 *style_list = (CARD32 *)&data[2];
XIMStyle *style;
XIMStyles *rep;
register int i;
char *p;
- int alloc_len;
+ unsigned int alloc_len;
if (!(value))
return False;
+ if (num > (USHRT_MAX / sizeof(XIMStyle)))
+ return False;
+ if ((sizeof(num) + (num * sizeof(XIMStyle))) > data_len)
+ return False;
alloc_len = sizeof(XIMStyles) + sizeof(XIMStyle) * num;
+ if (alloc_len < sizeof(XIMStyles))
+ return False;
if (!(p = Xmalloc(alloc_len)))
return False;
@@ -313,7 +321,7 @@ _XimAttributeToValue(
case XimType_XFontSet:
{
- INT16 len = data[0];
+ CARD16 len = data[0];
char *base_name;
XFontSet rep = (XFontSet)NULL;
char **missing_list = NULL;
@@ -324,11 +332,12 @@ _XimAttributeToValue(
return False;
if (!ic)
return False;
-
+ if (len > data_len)
+ return False;
if (!(base_name = Xmalloc(len + 1)))
return False;
- (void)strncpy(base_name, (char *)&data[1], (int)len);
+ (void)strncpy(base_name, (char *)&data[1], (size_t)len);
base_name[len] = '\0';
if (mode & XIM_PREEDIT_ATTR) {
@@ -357,19 +366,25 @@ _XimAttributeToValue(
case XimType_XIMHotKeyTriggers:
{
- INT32 num = *((CARD32 *)data);
+ CARD32 num = *((CARD32 *)data);
register CARD32 *key_list = (CARD32 *)&data[2];
XIMHotKeyTrigger *key;
XIMHotKeyTriggers *rep;
register int i;
char *p;
- int alloc_len;
+ unsigned int alloc_len;
if (!(value))
return False;
+ if (num > (UINT_MAX / sizeof(XIMHotKeyTrigger)))
+ return False;
+ if ((sizeof(num) + (num * sizeof(XIMHotKeyTrigger))) > data_len)
+ return False;
alloc_len = sizeof(XIMHotKeyTriggers)
+ sizeof(XIMHotKeyTrigger) * num;
+ if (alloc_len < sizeof(XIMHotKeyTriggers))
+ return False;
if (!(p = Xmalloc(alloc_len)))
return False;
@@ -1378,13 +1393,13 @@ _XimEncodeSavedICATTRIBUTE(
static unsigned int
_XimCountNumberOfAttr(
- INT16 total,
- CARD16 *attr,
- int *names_len)
+ CARD16 total,
+ CARD16 *attr,
+ unsigned int *names_len)
{
unsigned int n;
- INT16 len;
- INT16 min_len = sizeof(CARD16) /* sizeof attribute ID */
+ CARD16 len;
+ CARD16 min_len = sizeof(CARD16) /* sizeof attribute ID */
+ sizeof(CARD16) /* sizeof type of value */
+ sizeof(INT16); /* sizeof length of attribute */
@@ -1392,6 +1407,9 @@ _XimCountNumberOfAttr(
*names_len = 0;
while (total > min_len) {
len = attr[2];
+ if (len >= (total - min_len)) {
+ return 0;
+ }
*names_len += (len + 1);
len += (min_len + XIM_PAD(len + 2));
total -= len;
@@ -1406,17 +1424,15 @@ _XimGetAttributeID(
Xim im,
CARD16 *buf)
{
- unsigned int n;
+ unsigned int n, names_len, values_len;
XIMResourceList res;
char *names;
- int names_len;
XPointer tmp;
XIMValuesList *values_list;
char **values;
- int values_len;
register int i;
- INT16 len;
- INT16 min_len = sizeof(CARD16) /* sizeof attribute ID */
+ CARD16 len;
+ CARD16 min_len = sizeof(CARD16) /* sizeof attribute ID */
+ sizeof(CARD16) /* sizeof type of value */
+ sizeof(INT16); /* sizeof length of attr */
/*
