Fixes for Heap corruption in the X input method client in libX11
CVE-2020-14344 These where reported to X.Org and patches proposed by Todd Carson. Thanks.
This commit is contained in:
matthieu
parent
c7cbd7e332
commit
f22a219d59
@ -350,7 +350,7 @@ _XimProtoGetICValues(
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+ sizeof(INT16)
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+ XIM_PAD(2 + buf_size);
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if (!(buf = Xmalloc(buf_size)))
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if (!(buf = Xcalloc(buf_size, 1)))
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return arg->name;
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buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
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@ -708,6 +708,7 @@ _XimProtoSetICValues(
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#endif /* XIM_CONNECTABLE */
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_XimGetCurrentICValues(ic, &ic_values);
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memset(tmp_buf, 0, sizeof(tmp_buf32));
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buf = tmp_buf;
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buf_size = XIM_HEADER_SIZE
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+ sizeof(CARD16) + sizeof(CARD16) + sizeof(INT16) + sizeof(CARD16);
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@ -730,7 +731,7 @@ _XimProtoSetICValues(
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buf_size += ret_len;
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if (buf == tmp_buf) {
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if (!(tmp = Xmalloc(buf_size + data_len))) {
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if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
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return tmp_name;
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}
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memcpy(tmp, buf, buf_size);
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@ -740,6 +741,7 @@ _XimProtoSetICValues(
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Xfree(buf);
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return tmp_name;
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}
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memset(&tmp[buf_size], 0, data_len);
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buf = tmp;
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}
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}
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@ -62,6 +62,7 @@ PERFORMANCE OF THIS SOFTWARE.
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#include "XimTrInt.h"
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#include "Ximint.h"
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#include <limits.h>
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int
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_XimCheckDataSize(
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@ -807,12 +808,16 @@ _XimOpen(
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int buf_size;
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int ret_code;
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char *locale_name;
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size_t locale_len;
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locale_name = im->private.proto.locale_name;
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len = strlen(locale_name);
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buf_b[0] = (BYTE)len; /* length of locale name */
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(void)strcpy((char *)&buf_b[1], locale_name); /* locale name */
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len += sizeof(BYTE); /* sizeof length */
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locale_len = strlen(locale_name);
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if (locale_len > UCHAR_MAX)
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return False;
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memset(buf32, 0, sizeof(buf32));
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buf_b[0] = (BYTE)locale_len; /* length of locale name */
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memcpy(&buf_b[1], locale_name, locale_len); /* locale name */
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len = (INT16)(locale_len + sizeof(BYTE)); /* sizeof length */
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XIM_SET_PAD(buf_b, len); /* pad */
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_XimSetHeader((XPointer)buf, XIM_OPEN, 0, &len);
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@ -1287,6 +1292,7 @@ _XimProtoSetIMValues(
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#endif /* XIM_CONNECTABLE */
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_XimGetCurrentIMValues(im, &im_values);
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memset(tmp_buf, 0, sizeof(tmp_buf32));
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buf = tmp_buf;
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buf_size = XIM_HEADER_SIZE + sizeof(CARD16) + sizeof(INT16);
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data_len = BUFSIZE - buf_size;
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@ -1307,7 +1313,7 @@ _XimProtoSetIMValues(
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buf_size += ret_len;
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if (buf == tmp_buf) {
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if (!(tmp = Xmalloc(buf_size + data_len))) {
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if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
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return arg->name;
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}
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memcpy(tmp, buf, buf_size);
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@ -1317,6 +1323,7 @@ _XimProtoSetIMValues(
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Xfree(buf);
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return arg->name;
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}
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memset(&tmp[buf_size], 0, data_len);
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buf = tmp;
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}
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}
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@ -1458,7 +1465,7 @@ _XimProtoGetIMValues(
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+ sizeof(INT16)
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+ XIM_PAD(buf_size);
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if (!(buf = Xmalloc(buf_size)))
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if (!(buf = Xcalloc(buf_size, 1)))
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return arg->name;
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buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
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@ -1720,7 +1727,7 @@ _XimEncodingNegotiation(
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+ sizeof(CARD16)
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+ detail_len;
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if (!(buf = Xmalloc(XIM_HEADER_SIZE + len)))
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if (!(buf = Xcalloc(XIM_HEADER_SIZE + len, 1)))
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goto free_detail_ptr;
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buf_s = (CARD16 *)&buf[XIM_HEADER_SIZE];
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@ -1816,6 +1823,7 @@ _XimSendSavedIMValues(
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int ret_code;
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_XimGetCurrentIMValues(im, &im_values);
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memset(tmp_buf, 0, sizeof(tmp_buf32));
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buf = tmp_buf;
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buf_size = XIM_HEADER_SIZE + sizeof(CARD16) + sizeof(INT16);
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data_len = BUFSIZE - buf_size;
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@ -1838,7 +1846,7 @@ _XimSendSavedIMValues(
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buf_size += ret_len;
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if (buf == tmp_buf) {
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if (!(tmp = Xmalloc(buf_size + data_len))) {
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if (!(tmp = Xcalloc(buf_size + data_len, 1))) {
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return False;
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}
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memcpy(tmp, buf, buf_size);
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@ -1848,6 +1856,7 @@ _XimSendSavedIMValues(
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Xfree(buf);
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return False;
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}
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memset(&tmp[buf_size], 0, data_len);
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buf = tmp;
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}
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}
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@ -29,6 +29,8 @@ PERFORMANCE OF THIS SOFTWARE.
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <limits.h>
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#include "Xlibint.h"
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#include "Xlcint.h"
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#include "Ximint.h"
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@ -214,7 +216,7 @@ _XimAttributeToValue(
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Xic ic,
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XIMResourceList res,
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CARD16 *data,
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INT16 data_len,
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CARD16 data_len,
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XPointer value,
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BITMASK32 mode)
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{
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@ -250,18 +252,24 @@ _XimAttributeToValue(
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case XimType_XIMStyles:
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{
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INT16 num = data[0];
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CARD16 num = data[0];
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register CARD32 *style_list = (CARD32 *)&data[2];
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XIMStyle *style;
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XIMStyles *rep;
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register int i;
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char *p;
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int alloc_len;
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unsigned int alloc_len;
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if (!(value))
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return False;
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if (num > (USHRT_MAX / sizeof(XIMStyle)))
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return False;
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if ((sizeof(num) + (num * sizeof(XIMStyle))) > data_len)
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return False;
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alloc_len = sizeof(XIMStyles) + sizeof(XIMStyle) * num;
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if (alloc_len < sizeof(XIMStyles))
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return False;
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if (!(p = Xmalloc(alloc_len)))
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return False;
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@ -313,7 +321,7 @@ _XimAttributeToValue(
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case XimType_XFontSet:
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{
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INT16 len = data[0];
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CARD16 len = data[0];
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char *base_name;
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XFontSet rep = (XFontSet)NULL;
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char **missing_list = NULL;
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@ -324,11 +332,12 @@ _XimAttributeToValue(
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return False;
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if (!ic)
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return False;
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if (len > data_len)
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return False;
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if (!(base_name = Xmalloc(len + 1)))
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return False;
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(void)strncpy(base_name, (char *)&data[1], (int)len);
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(void)strncpy(base_name, (char *)&data[1], (size_t)len);
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base_name[len] = '\0';
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if (mode & XIM_PREEDIT_ATTR) {
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@ -357,19 +366,25 @@ _XimAttributeToValue(
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case XimType_XIMHotKeyTriggers:
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{
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INT32 num = *((CARD32 *)data);
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CARD32 num = *((CARD32 *)data);
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register CARD32 *key_list = (CARD32 *)&data[2];
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XIMHotKeyTrigger *key;
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XIMHotKeyTriggers *rep;
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register int i;
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char *p;
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int alloc_len;
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unsigned int alloc_len;
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if (!(value))
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return False;
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if (num > (UINT_MAX / sizeof(XIMHotKeyTrigger)))
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return False;
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if ((sizeof(num) + (num * sizeof(XIMHotKeyTrigger))) > data_len)
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return False;
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alloc_len = sizeof(XIMHotKeyTriggers)
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+ sizeof(XIMHotKeyTrigger) * num;
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if (alloc_len < sizeof(XIMHotKeyTriggers))
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return False;
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if (!(p = Xmalloc(alloc_len)))
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return False;
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@ -1378,13 +1393,13 @@ _XimEncodeSavedICATTRIBUTE(
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static unsigned int
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_XimCountNumberOfAttr(
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INT16 total,
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CARD16 *attr,
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int *names_len)
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CARD16 total,
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CARD16 *attr,
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unsigned int *names_len)
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{
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unsigned int n;
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INT16 len;
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INT16 min_len = sizeof(CARD16) /* sizeof attribute ID */
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CARD16 len;
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CARD16 min_len = sizeof(CARD16) /* sizeof attribute ID */
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+ sizeof(CARD16) /* sizeof type of value */
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+ sizeof(INT16); /* sizeof length of attribute */
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@ -1392,6 +1407,9 @@ _XimCountNumberOfAttr(
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*names_len = 0;
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while (total > min_len) {
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len = attr[2];
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if (len >= (total - min_len)) {
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return 0;
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}
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*names_len += (len + 1);
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len += (min_len + XIM_PAD(len + 2));
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total -= len;
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@ -1406,17 +1424,15 @@ _XimGetAttributeID(
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Xim im,
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CARD16 *buf)
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{
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unsigned int n;
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unsigned int n, names_len, values_len;
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XIMResourceList res;
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char *names;
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int names_len;
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XPointer tmp;
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XIMValuesList *values_list;
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char **values;
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int values_len;
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register int i;
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INT16 len;
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INT16 min_len = sizeof(CARD16) /* sizeof attribute ID */
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CARD16 len;
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CARD16 min_len = sizeof(CARD16) /* sizeof attribute ID */
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+ sizeof(CARD16) /* sizeof type of value */
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+ sizeof(INT16); /* sizeof length of attr */
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/*
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