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-rw-r--r--php-cve-2023-3824.patch406
1 files changed, 406 insertions, 0 deletions
diff --git a/php-cve-2023-3824.patch b/php-cve-2023-3824.patch
new file mode 100644
index 0000000..1f5a60b
--- /dev/null
+++ b/php-cve-2023-3824.patch
@@ -0,0 +1,406 @@
+From 66a1fcc69765bb704146fe7d084848302dd3c89e Mon Sep 17 00:00:00 2001
+From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
+Date: Sat, 15 Jul 2023 17:33:52 +0200
+Subject: [PATCH 2/3] Sanitize libxml2 globals before parsing
+
+Fixes GHSA-3qrf-m4j2-pcrr.
+
+To parse a document with libxml2, you first need to create a parsing context.
+The parsing context contains parsing options (e.g. XML_NOENT to substitute
+entities) that the application (in this case PHP) can set.
+Unfortunately, libxml2 also supports providing default set options.
+For example, if you call xmlSubstituteEntitiesDefault(1) then the XML_NOENT
+option will be added to the parsing options every time you create a parsing
+context **even if the application never requested XML_NOENT**.
+
+Third party extensions can override these globals, in particular the
+substitute entity global. This causes entity substitution to be
+unexpectedly active.
+
+Fix it by setting the parsing options to a sane known value.
+For API calls that depend on global state we introduce
+PHP_LIBXML_SANITIZE_GLOBALS() and PHP_LIBXML_RESTORE_GLOBALS().
+For other APIs that work directly with a context we introduce
+php_libxml_sanitize_parse_ctxt_options().
+
+(cherry picked from commit c283c3ab0ba45d21b2b8745c1f9c7cbfe771c975)
+(cherry picked from commit b3758bd21223b97c042cae7bd26a66cde081ea98)
+(cherry picked from commit 4fb61f06b1aff89a4d7e548c37ffa5bf573270c3)
+(cherry picked from commit d7de6908dfc8774e86a54100ad4e2ee810426001)
+---
+ ext/dom/document.c | 15 +++++++++++++++
+ ext/dom/documentfragment.c | 2 ++
+ ext/libxml/php_libxml.h | 36 +++++++++++++++++++++++++++++++++++
+ ext/simplexml/simplexml.c | 6 ++++++
+ ext/soap/php_xml.c | 2 ++
+ ext/xml/compat.c | 2 ++
+ ext/xmlreader/php_xmlreader.c | 9 +++++++++
+ ext/xsl/xsltprocessor.c | 9 ++++-----
+ 8 files changed, 76 insertions(+), 5 deletions(-)
+
+diff --git a/ext/dom/document.c b/ext/dom/document.c
+index c212faa695..b0eed5820b 100644
+--- a/ext/dom/document.c
++++ b/ext/dom/document.c
+@@ -1438,6 +1438,7 @@ static xmlDocPtr dom_document_parser(zval *id, int mode, char *source, size_t so
+ options |= XML_PARSE_NOBLANKS;
+ }
+
++ php_libxml_sanitize_parse_ctxt_options(ctxt);
+ xmlCtxtUseOptions(ctxt, options);
+
+ ctxt->recovery = recover;
+@@ -1735,7 +1736,9 @@ PHP_FUNCTION(dom_document_xinclude)
+
+ DOM_GET_OBJ(docp, id, xmlDocPtr, intern);
+
++ PHP_LIBXML_SANITIZE_GLOBALS(xinclude);
+ err = xmlXIncludeProcessFlags(docp, (int)flags);
++ PHP_LIBXML_RESTORE_GLOBALS(xinclude);
+
+ /* XML_XINCLUDE_START and XML_XINCLUDE_END nodes need to be removed as these
+ are added via xmlXIncludeProcess to mark beginning and ending of xincluded document
+@@ -1774,6 +1777,7 @@ PHP_FUNCTION(dom_document_validate)
+
+ DOM_GET_OBJ(docp, id, xmlDocPtr, intern);
+
++ PHP_LIBXML_SANITIZE_GLOBALS(validate);
+ cvp = xmlNewValidCtxt();
+
+ cvp->userData = NULL;
+@@ -1785,6 +1789,7 @@ PHP_FUNCTION(dom_document_validate)
+ } else {
+ RETVAL_FALSE;
+ }
++ PHP_LIBXML_RESTORE_GLOBALS(validate);
+
+ xmlFreeValidCtxt(cvp);
+
+@@ -1818,14 +1823,18 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
+
+ DOM_GET_OBJ(docp, id, xmlDocPtr, intern);
+
++ PHP_LIBXML_SANITIZE_GLOBALS(new_parser_ctxt);
++
+ switch (type) {
+ case DOM_LOAD_FILE:
+ if (CHECK_NULL_PATH(source, source_len)) {
++ PHP_LIBXML_RESTORE_GLOBALS(new_parser_ctxt);
+ php_error_docref(NULL, E_WARNING, "Invalid Schema file source");
+ RETURN_FALSE;
+ }
+ valid_file = _dom_get_valid_file_path(source, resolved_path, MAXPATHLEN);
+ if (!valid_file) {
++ PHP_LIBXML_RESTORE_GLOBALS(new_parser_ctxt);
+ php_error_docref(NULL, E_WARNING, "Invalid Schema file source");
+ RETURN_FALSE;
+ }
+@@ -1846,6 +1855,7 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
+ parser);
+ sptr = xmlSchemaParse(parser);
+ xmlSchemaFreeParserCtxt(parser);
++ PHP_LIBXML_RESTORE_GLOBALS(new_parser_ctxt);
+ if (!sptr) {
+ php_error_docref(NULL, E_WARNING, "Invalid Schema");
+ RETURN_FALSE;
+@@ -1866,11 +1876,13 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
+ }
+ #endif
+
++ PHP_LIBXML_SANITIZE_GLOBALS(validate);
+ xmlSchemaSetValidOptions(vptr, valid_opts);
+ xmlSchemaSetValidErrors(vptr, php_libxml_error_handler, php_libxml_error_handler, vptr);
+ is_valid = xmlSchemaValidateDoc(vptr, docp);
+ xmlSchemaFree(sptr);
+ xmlSchemaFreeValidCtxt(vptr);
++ PHP_LIBXML_RESTORE_GLOBALS(validate);
+
+ if (is_valid == 0) {
+ RETURN_TRUE;
+@@ -1940,12 +1952,14 @@ static void _dom_document_relaxNG_validate(INTERNAL_FUNCTION_PARAMETERS, int typ
+ return;
+ }
+
++ PHP_LIBXML_SANITIZE_GLOBALS(parse);
+ xmlRelaxNGSetParserErrors(parser,
+ (xmlRelaxNGValidityErrorFunc) php_libxml_error_handler,
+ (xmlRelaxNGValidityWarningFunc) php_libxml_error_handler,
+ parser);
+ sptr = xmlRelaxNGParse(parser);
+ xmlRelaxNGFreeParserCtxt(parser);
++ PHP_LIBXML_RESTORE_GLOBALS(parse);
+ if (!sptr) {
+ php_error_docref(NULL, E_WARNING, "Invalid RelaxNG");
+ RETURN_FALSE;
+@@ -2045,6 +2059,7 @@ static void dom_load_html(INTERNAL_FUNCTION_PARAMETERS, int mode) /* {{{ */
+ ctxt->sax->error = php_libxml_ctx_error;
+ ctxt->sax->warning = php_libxml_ctx_warning;
+ }
++ php_libxml_sanitize_parse_ctxt_options(ctxt);
+ if (options) {
+ htmlCtxtUseOptions(ctxt, (int)options);
+ }
+diff --git a/ext/dom/documentfragment.c b/ext/dom/documentfragment.c
+index 87cb691501..b7ecfdc14b 100644
+--- a/ext/dom/documentfragment.c
++++ b/ext/dom/documentfragment.c
+@@ -134,7 +134,9 @@ PHP_METHOD(domdocumentfragment, appendXML) {
+ }
+
+ if (data) {
++ PHP_LIBXML_SANITIZE_GLOBALS(parse);
+ err = xmlParseBalancedChunkMemory(nodep->doc, NULL, NULL, 0, (xmlChar *) data, &lst);
++ PHP_LIBXML_RESTORE_GLOBALS(parse);
+ if (err != 0) {
+ RETURN_FALSE;
+ }
+diff --git a/ext/libxml/php_libxml.h b/ext/libxml/php_libxml.h
+index f7aa726d88..371b4eecc5 100644
+--- a/ext/libxml/php_libxml.h
++++ b/ext/libxml/php_libxml.h
+@@ -122,6 +122,42 @@ PHP_LIBXML_API void php_libxml_shutdown(void);
+ ZEND_TSRMLS_CACHE_EXTERN()
+ #endif
+
++/* Other extension may override the global state options, these global options
++ * are copied initially to ctxt->options. Set the options to a known good value.
++ * See libxml2 globals.c and parserInternals.c.
++ * The unique_name argument allows multiple sanitizes and restores within the
++ * same function, even nested is necessary. */
++#define PHP_LIBXML_SANITIZE_GLOBALS(unique_name) \
++ int xml_old_loadsubset_##unique_name = xmlLoadExtDtdDefaultValue; \
++ xmlLoadExtDtdDefaultValue = 0; \
++ int xml_old_validate_##unique_name = xmlDoValidityCheckingDefaultValue; \
++ xmlDoValidityCheckingDefaultValue = 0; \
++ int xml_old_pedantic_##unique_name = xmlPedanticParserDefault(0); \
++ int xml_old_substitute_##unique_name = xmlSubstituteEntitiesDefault(0); \
++ int xml_old_linenrs_##unique_name = xmlLineNumbersDefault(0); \
++ int xml_old_blanks_##unique_name = xmlKeepBlanksDefault(1);
++
++#define PHP_LIBXML_RESTORE_GLOBALS(unique_name) \
++ xmlLoadExtDtdDefaultValue = xml_old_loadsubset_##unique_name; \
++ xmlDoValidityCheckingDefaultValue = xml_old_validate_##unique_name; \
++ (void) xmlPedanticParserDefault(xml_old_pedantic_##unique_name); \
++ (void) xmlSubstituteEntitiesDefault(xml_old_substitute_##unique_name); \
++ (void) xmlLineNumbersDefault(xml_old_linenrs_##unique_name); \
++ (void) xmlKeepBlanksDefault(xml_old_blanks_##unique_name);
++
++/* Alternative for above, working directly on the context and not setting globals.
++ * Generally faster because no locking is involved, and this has the advantage that it sets the options to a known good value. */
++static zend_always_inline void php_libxml_sanitize_parse_ctxt_options(xmlParserCtxtPtr ctxt)
++{
++ ctxt->loadsubset = 0;
++ ctxt->validate = 0;
++ ctxt->pedantic = 0;
++ ctxt->replaceEntities = 0;
++ ctxt->linenumbers = 0;
++ ctxt->keepBlanks = 1;
++ ctxt->options = 0;
++}
++
+ #else /* HAVE_LIBXML */
+ #define libxml_module_ptr NULL
+ #endif
+diff --git a/ext/simplexml/simplexml.c b/ext/simplexml/simplexml.c
+index ae067cdcdd..bfac015964 100644
+--- a/ext/simplexml/simplexml.c
++++ b/ext/simplexml/simplexml.c
+@@ -2229,7 +2229,9 @@ PHP_FUNCTION(simplexml_load_file)
+ RETURN_FALSE;
+ }
+
++ PHP_LIBXML_SANITIZE_GLOBALS(read_file);
+ docp = xmlReadFile(filename, NULL, (int)options);
++ PHP_LIBXML_RESTORE_GLOBALS(read_file);
+
+ if (!docp) {
+ RETURN_FALSE;
+@@ -2283,7 +2285,9 @@ PHP_FUNCTION(simplexml_load_string)
+ RETURN_FALSE;
+ }
+
++ PHP_LIBXML_SANITIZE_GLOBALS(read_memory);
+ docp = xmlReadMemory(data, (int)data_len, NULL, NULL, (int)options);
++ PHP_LIBXML_RESTORE_GLOBALS(read_memory);
+
+ if (!docp) {
+ RETURN_FALSE;
+@@ -2333,7 +2337,9 @@ SXE_METHOD(__construct)
+ return;
+ }
+
++ PHP_LIBXML_SANITIZE_GLOBALS(read_file_or_memory);
+ docp = is_url ? xmlReadFile(data, NULL, (int)options) : xmlReadMemory(data, (int)data_len, NULL, NULL, (int)options);
++ PHP_LIBXML_RESTORE_GLOBALS(read_file_or_memory);
+
+ if (!docp) {
+ ((php_libxml_node_object *)sxe)->document = NULL;
+diff --git a/ext/soap/php_xml.c b/ext/soap/php_xml.c
+index 1ac684eb81..053960c559 100644
+--- a/ext/soap/php_xml.c
++++ b/ext/soap/php_xml.c
+@@ -94,6 +94,7 @@ xmlDocPtr soap_xmlParseFile(const char *filename)
+ if (ctxt) {
+ zend_bool old;
+
++ php_libxml_sanitize_parse_ctxt_options(ctxt);
+ ctxt->keepBlanks = 0;
+ ctxt->sax->ignorableWhitespace = soap_ignorableWhitespace;
+ ctxt->sax->comment = soap_Comment;
+@@ -144,6 +145,7 @@ xmlDocPtr soap_xmlParseMemory(const void *buf, size_t buf_size)
+ if (ctxt) {
+ zend_bool old;
+
++ php_libxml_sanitize_parse_ctxt_options(ctxt);
+ ctxt->sax->ignorableWhitespace = soap_ignorableWhitespace;
+ ctxt->sax->comment = soap_Comment;
+ ctxt->sax->warning = NULL;
+diff --git a/ext/xml/compat.c b/ext/xml/compat.c
+index ef83485722..c55047215b 100644
+--- a/ext/xml/compat.c
++++ b/ext/xml/compat.c
+@@ -19,6 +19,7 @@
+ #include "php.h"
+ #if defined(HAVE_LIBXML) && (defined(HAVE_XML) || defined(HAVE_XMLRPC)) && !defined(HAVE_LIBEXPAT)
+ #include "expat_compat.h"
++#include "ext/libxml/php_libxml.h"
+
+ typedef struct _php_xml_ns {
+ xmlNsPtr nsptr;
+@@ -473,6 +474,7 @@ XML_ParserCreate_MM(const XML_Char *encoding, const XML_Memory_Handling_Suite *m
+ parser->parser->charset = XML_CHAR_ENCODING_NONE;
+ #endif
+
++ php_libxml_sanitize_parse_ctxt_options(parser->parser);
+ #if LIBXML_VERSION >= 20703
+ xmlCtxtUseOptions(parser->parser, XML_PARSE_OLDSAX);
+ #endif
+diff --git a/ext/xmlreader/php_xmlreader.c b/ext/xmlreader/php_xmlreader.c
+index 0f2b62ae20..f0fd013ff9 100644
+--- a/ext/xmlreader/php_xmlreader.c
++++ b/ext/xmlreader/php_xmlreader.c
+@@ -301,6 +301,7 @@ static xmlRelaxNGPtr _xmlreader_get_relaxNG(char *source, size_t source_len, siz
+ return NULL;
+ }
+
++ PHP_LIBXML_SANITIZE_GLOBALS(parse);
+ if (error_func || warn_func) {
+ xmlRelaxNGSetParserErrors(parser,
+ (xmlRelaxNGValidityErrorFunc) error_func,
+@@ -309,6 +310,7 @@ static xmlRelaxNGPtr _xmlreader_get_relaxNG(char *source, size_t source_len, siz
+ }
+ sptr = xmlRelaxNGParse(parser);
+ xmlRelaxNGFreeParserCtxt(parser);
++ PHP_LIBXML_RESTORE_GLOBALS(parse);
+
+ return sptr;
+ }
+@@ -881,7 +883,9 @@ PHP_METHOD(xmlreader, open)
+ valid_file = _xmlreader_get_valid_file_path(source, resolved_path, MAXPATHLEN );
+
+ if (valid_file) {
++ PHP_LIBXML_SANITIZE_GLOBALS(reader_for_file);
+ reader = xmlReaderForFile(valid_file, encoding, options);
++ PHP_LIBXML_RESTORE_GLOBALS(reader_for_file);
+ }
+
+ if (reader == NULL) {
+@@ -959,7 +963,9 @@ PHP_METHOD(xmlreader, setSchema)
+
+ intern = Z_XMLREADER_P(id);
+ if (intern && intern->ptr) {
++ PHP_LIBXML_SANITIZE_GLOBALS(schema);
+ retval = xmlTextReaderSchemaValidate(intern->ptr, source);
++ PHP_LIBXML_RESTORE_GLOBALS(schema);
+
+ if (retval == 0) {
+ RETURN_TRUE;
+@@ -1079,6 +1085,7 @@ PHP_METHOD(xmlreader, XML)
+ }
+ uri = (char *) xmlCanonicPath((const xmlChar *) resolved_path);
+ }
++ PHP_LIBXML_SANITIZE_GLOBALS(text_reader);
+ reader = xmlNewTextReader(inputbfr, uri);
+
+ if (reader != NULL) {
+@@ -1099,9 +1106,11 @@ PHP_METHOD(xmlreader, XML)
+ xmlFree(uri);
+ }
+
++ PHP_LIBXML_RESTORE_GLOBALS(text_reader);
+ return;
+ }
+ }
++ PHP_LIBXML_RESTORE_GLOBALS(text_reader);
+ }
+
+ if (uri) {
+diff --git a/ext/xsl/xsltprocessor.c b/ext/xsl/xsltprocessor.c
+index 9948d6f0b3..7bbe640a5c 100644
+--- a/ext/xsl/xsltprocessor.c
++++ b/ext/xsl/xsltprocessor.c
+@@ -396,7 +396,7 @@ PHP_FUNCTION(xsl_xsltprocessor_import_stylesheet)
+ xmlDoc *doc = NULL, *newdoc = NULL;
+ xsltStylesheetPtr sheetp, oldsheetp;
+ xsl_object *intern;
+- int prevSubstValue, prevExtDtdValue, clone_docu = 0;
++ int clone_docu = 0;
+ xmlNode *nodep = NULL;
+ zend_object_handlers *std_hnd;
+ zval *cloneDocu, member, rv;
+@@ -419,13 +419,12 @@ PHP_FUNCTION(xsl_xsltprocessor_import_stylesheet)
+ stylesheet document otherwise the node proxies will be a mess */
+ newdoc = xmlCopyDoc(doc, 1);
+ xmlNodeSetBase((xmlNodePtr) newdoc, (xmlChar *)doc->URL);
+- prevSubstValue = xmlSubstituteEntitiesDefault(1);
+- prevExtDtdValue = xmlLoadExtDtdDefaultValue;
++ PHP_LIBXML_SANITIZE_GLOBALS(parse);
++ xmlSubstituteEntitiesDefault(1);
+ xmlLoadExtDtdDefaultValue = XML_DETECT_IDS | XML_COMPLETE_ATTRS;
+
+ sheetp = xsltParseStylesheetDoc(newdoc);
+- xmlSubstituteEntitiesDefault(prevSubstValue);
+- xmlLoadExtDtdDefaultValue = prevExtDtdValue;
++ PHP_LIBXML_RESTORE_GLOBALS(parse);
+
+ if (!sheetp) {
+ xmlFreeDoc(newdoc);
+--
+2.41.0
+
+From 3ac0ce8a462cb31815330d1410e1a8a615c395eb Mon Sep 17 00:00:00 2001
+From: Remi Collet <remi@remirepo.net>
+Date: Tue, 1 Aug 2023 07:22:33 +0200
+Subject: [PATCH 3/3] NEWS
+
+(cherry picked from commit ef1d507acf7be23d7624dc3c891683b2218feb51)
+(cherry picked from commit 3cf7c2b10e577136b267f2d90bfdff6743271c5c)
+(cherry picked from commit 79c0bf87711036b83f8ee1723c034ccc839d847b)
+---
+ NEWS | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/NEWS b/NEWS
+index e7cdaa7698..99387fbfd7 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,6 +1,16 @@
+ PHP NEWS
+ |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+
++Backported from 8.0.30
++
++- Libxml:
++ . Fixed bug GHSA-3qrf-m4j2-pcrr (Security issue with external entity loading
++ in XML without enabling it). (CVE-2023-3823) (nielsdos, ilutov)
++
++- Phar:
++ . Fixed bug GHSA-jqcx-ccgc-xwhv (Buffer mismanagement in phar_dir_read()).
++ (CVE-2023-3824) (nielsdos)
++
+ Backported from 8.0.29
+
+ - Soap:
+--
+2.41.0
+