258 lines
7.9 KiB
Diff
258 lines
7.9 KiB
Diff
Backported from 5.5 for 5.4 by Remi Collet
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From 0da8b8b801f9276359262f1ef8274c7812d3dfda Mon Sep 17 00:00:00 2001
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From: Stanislav Malyshev <stas@php.net>
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Date: Sun, 15 May 2016 23:26:51 -0700
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Subject: [PATCH] Fix bug #72135 - don't create strings with lengths outside
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int range
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---
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ext/standard/html.c | 50 +++++++++++++++++++++++++++-----------------------
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1 file changed, 27 insertions(+), 23 deletions(-)
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diff --git a/ext/standard/html.c b/ext/standard/html.c
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index 72423b5..81d8aff 100644
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--- a/ext/standard/html.c
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+++ b/ext/standard/html.c
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@@ -163,7 +163,7 @@ static inline unsigned int get_next_char(
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else
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MB_FAILURE(pos, 4);
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}
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-
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+
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this_char = ((c & 0x07) << 18) | ((str[pos + 1] & 0x3f) << 12) | ((str[pos + 2] & 0x3f) << 6) | (str[pos + 3] & 0x3f);
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if (this_char < 0x10000 || this_char > 0x10FFFF) { /* non-shortest form or outside range */
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MB_FAILURE(pos, 4);
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@@ -437,7 +437,7 @@ static enum entity_charset determine_charset(char *charset_hint TSRMLS_DC)
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if (charset_hint) {
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int found = 0;
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-
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+
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/* now walk the charset map and look for the codeset */
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for (i = 0; charset_map[i].codeset; i++) {
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if (len == strlen(charset_map[i].codeset) && strncasecmp(charset_hint, charset_map[i].codeset, len) == 0) {
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@@ -545,7 +545,7 @@ static inline unsigned char unimap_bsearch(const uni_to_enc *table, unsigned cod
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return 0;
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code_key = (unsigned short) code_key_a;
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-
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+
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while (l <= h) {
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m = l + (h - l) / 2;
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if (code_key < m->un_code_point)
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@@ -571,7 +571,7 @@ static inline int map_from_unicode(unsigned code, enum entity_charset charset, u
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/* identity mapping of code points to unicode */
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if (code > 0xFF) {
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return FAILURE;
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- }
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+ }
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*res = code;
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break;
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@@ -590,7 +590,7 @@ static inline int map_from_unicode(unsigned code, enum entity_charset charset, u
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return FAILURE;
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}
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break;
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-
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+
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case cs_8859_15:
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if (code < 0xA4 || (code > 0xBE && code <= 0xFF)) {
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*res = code;
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@@ -634,7 +634,7 @@ static inline int map_from_unicode(unsigned code, enum entity_charset charset, u
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case cs_cp866:
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table = unimap_cp866;
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table_size = sizeof(unimap_cp866) / sizeof(*unimap_cp866);
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-
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+
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table_over_7F:
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if (code <= 0x7F) {
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*res = code;
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@@ -710,7 +710,7 @@ static inline int unicode_cp_is_allowed(unsigned uni_cp, int document_type)
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* Not sure this is the relevant part for HTML 5, though. I opted to
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* disallow the characters that would result in a parse error when
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* preprocessing of the input stream. See also section 8.1.3.
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- *
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+ *
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* It's unclear if XHTML 1.0 allows C1 characters. I'll opt to apply to
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* XHTML 1.0 the same rules as for XML 1.0.
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* See <http://cmsmcq.com/2007/C1.xml>.
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@@ -774,7 +774,7 @@ static inline int numeric_entity_is_allowed(unsigned uni_cp, int document_type)
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/* {{{ process_numeric_entity
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* Auxiliary function to traverse_for_entities.
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* On input, *buf should point to the first character after # and on output, it's the last
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- * byte read, no matter if there was success or insuccess.
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+ * byte read, no matter if there was success or insuccess.
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*/
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static inline int process_numeric_entity(const char **buf, unsigned *code_point)
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{
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@@ -784,7 +784,7 @@ static inline int process_numeric_entity(const char **buf, unsigned *code_point)
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if (hexadecimal && (**buf != '\0'))
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(*buf)++;
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-
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+
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/* strtol allows whitespace and other stuff in the beginning
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* we're not interested */
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if ((hexadecimal && !isxdigit(**buf)) ||
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@@ -969,7 +969,7 @@ static void traverse_for_entities(
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goto invalid_code;
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/* are we allowed to decode this entity in this document type?
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- * HTML 5 is the only that has a character that cannot be used in
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+ * HTML 5 is the only that has a character that cannot be used in
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* a numeric entity but is allowed literally (U+000D). The
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* unoptimized version would be ... || !numeric_entity_is_allowed(code) */
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if (!unicode_cp_is_allowed(code, doctype) ||
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@@ -996,9 +996,9 @@ static void traverse_for_entities(
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}
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}
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}
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-
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+
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assert(*next == ';');
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-
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+
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if (((code == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
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(code == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE)))
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/* && code2 == '\0' always true for current maps */)
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@@ -1026,7 +1026,7 @@ static void traverse_for_entities(
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*(q++) = *p;
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}
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}
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-
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+
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*q = '\0';
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*retlen = (size_t)(q - ret);
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}
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@@ -1066,7 +1066,7 @@ static entity_table_opt determine_entity_table(int all, int doctype)
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entity_table_opt retval = {NULL};
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assert(!(doctype == ENT_HTML_DOC_XML1 && all));
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-
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+
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if (all) {
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retval.ms_table = (doctype == ENT_HTML_DOC_HTML5) ?
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entity_ms_table_html5 : entity_ms_table_html4;
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@@ -1111,13 +1111,13 @@ PHPAPI char *php_unescape_html_entities(unsigned char *old, size_t oldlen, size_
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if (retlen == 0) {
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goto empty_source;
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}
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-
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+
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inverse_map = unescape_inverse_map(all, flags);
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-
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+
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/* replace numeric entities */
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traverse_for_entities(old, oldlen, ret, &retlen, all, flags, inverse_map, charset);
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-empty_source:
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+empty_source:
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*newlen = retlen;
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return ret;
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}
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@@ -1141,7 +1141,7 @@ static inline void find_entity_for_char(
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{
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unsigned stage1_idx = ENT_STAGE1_INDEX(k);
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const entity_stage3_row *c;
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-
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+
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if (stage1_idx > 0x1D) {
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*entity = NULL;
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*entity_len = 0;
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@@ -1162,7 +1162,7 @@ static inline void find_entity_for_char(
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if (!(*cursor < oldlen))
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goto no_suitable_2nd;
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- next_char = get_next_char(charset, old, oldlen, cursor, &status);
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+ next_char = get_next_char(charset, old, oldlen, cursor, &status);
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if (status == FAILURE)
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goto no_suitable_2nd;
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@@ -1187,7 +1187,7 @@ static inline void find_entity_for_char(
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*entity = (const unsigned char *)
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c->data.multicodepoint_table[0].leading_entry.default_entity;
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*entity_len = c->data.multicodepoint_table[0].leading_entry.default_entity_len;
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- }
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+ }
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}
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/* }}} */
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@@ -1255,7 +1255,7 @@ PHPAPI char *php_escape_html_entities_ex(unsigned char *old, size_t oldlen, size
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/* initial estimate */
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if (oldlen < 64) {
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- maxlen = 128;
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+ maxlen = 128;
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} else {
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maxlen = 2 * oldlen;
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if (maxlen < oldlen) {
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@@ -1444,6 +1444,10 @@ static void php_html_entities(INTERNAL_FUNCTION_PARAMETERS, int all)
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}
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replaced = php_escape_html_entities_ex(str, str_len, &new_len, all, (int) flags, hint_charset, double_encode TSRMLS_CC);
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+ if (new_len > INT_MAX) {
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+ efree(replaced);
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+ RETURN_FALSE;
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+ }
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RETVAL_STRINGL(replaced, (int)new_len, 0);
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}
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/* }}} */
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@@ -1577,7 +1581,7 @@ static inline void write_s3row_data(
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} else {
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spe_cp = uni_cp;
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}
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-
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+
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written_k2 = write_octet_sequence(&key[written_k1], charset, spe_cp);
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memcpy(&entity[1], mcpr[i].normal_entry.entity, l);
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entity[l + 1] = ';';
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@@ -1615,7 +1619,7 @@ PHP_FUNCTION(get_html_translation_table)
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LIMIT_ALL(all, doctype, charset);
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array_init(return_value);
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-
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+
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entity_table = determine_entity_table(all, doctype);
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if (all && !CHARSET_UNICODE_COMPAT(charset)) {
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to_uni_table = enc_to_uni_index[charset];
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From e9559131152ab0fa89737db11ebe8f43e1435b96 Mon Sep 17 00:00:00 2001
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From: Stanislav Malyshev <stas@php.net>
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Date: Tue, 24 May 2016 15:52:15 -0700
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Subject: [PATCH] Better fix for bug #72135
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---
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ext/standard/html.c | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/ext/standard/html.c b/ext/standard/html.c
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index 81d8aff..c5fd4b8 100644
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--- a/ext/standard/html.c
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+++ b/ext/standard/html.c
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@@ -1423,6 +1423,11 @@ PHPAPI char *php_escape_html_entities_ex(unsigned char *old, size_t oldlen, size
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}
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replaced[len] = '\0';
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*newlen = len;
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+ if(len > INT_MAX) {
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+ zend_error_noreturn(E_ERROR, "Escaped string is too long");
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+ efree(replaced);
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+ return NULL;
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+ }
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return replaced;
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}
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@@ -1444,10 +1449,6 @@ static void php_html_entities(INTERNAL_FUNCTION_PARAMETERS, int all)
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}
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replaced = php_escape_html_entities_ex(str, str_len, &new_len, all, (int) flags, hint_charset, double_encode TSRMLS_CC);
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- if (new_len > INT_MAX) {
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- efree(replaced);
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- RETURN_FALSE;
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- }
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RETVAL_STRINGL(replaced, (int)new_len, 0);
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}
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/* }}} */
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