File php-5.2.14-CVE-2012-0057.patch of Package php5-monolithic

http://svn.php.net/viewvc/?view=revision&amp;revision=317759
http://svn.php.net/viewvc/?view=revision&amp;revision=317801
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=658088#22
Index: ext/xsl/xsltprocessor.c
===================================================================
--- ext/xsl/xsltprocessor.c.orig
+++ ext/xsl/xsltprocessor.c
@@ -26,6 +26,7 @@
 #include "php.h"
 #include "php_xsl.h"
 #include "ext/libxml/php_libxml.h"
+#include "zend_ini.h"
 
 /* {{{ arginfo */
 static
@@ -478,6 +479,9 @@ static xmlDocPtr php_xsl_apply_styleshee
 	int clone;
 	zval *doXInclude, *member;
 	zend_object_handlers *std_hnd;
+        int secPrefsError = 0;
+        int secPrefsIni;
+        xsltSecurityPrefsPtr secPrefs = NULL;
 
 	node = php_libxml_import_node(docp TSRMLS_CC);
 	
@@ -523,9 +527,52 @@ static xmlDocPtr php_xsl_apply_styleshee
 	}
 	efree(member);
 
-	newdocp = xsltApplyStylesheetUser(style, doc, (const char**) params, NULL, NULL, ctxt);
+       secPrefsIni = INI_INT("xsl.security_prefs");
+       
+       //if securityPrefs is set to NONE, we don't have to do any checks, but otherwise...
+       if (secPrefsIni != XSL_SECPREF_NONE) {
+               secPrefs = xsltNewSecurityPrefs(); 
+               if (secPrefsIni & XSL_SECPREF_READ_FILE ) { 
+                       if (0 != xsltSetSecurityPrefs(secPrefs, XSLT_SECPREF_READ_FILE, xsltSecurityForbid)) { 
+                               secPrefsError = 1;
+                       }
+               }
+               if (secPrefsIni & XSL_SECPREF_WRITE_FILE ) { 
+                       if (0 != xsltSetSecurityPrefs(secPrefs, XSLT_SECPREF_WRITE_FILE, xsltSecurityForbid)) { 
+                               secPrefsError = 1;
+                       }
+               }
+               if (secPrefsIni & XSL_SECPREF_CREATE_DIRECTORY ) { 
+                       if (0 != xsltSetSecurityPrefs(secPrefs, XSLT_SECPREF_CREATE_DIRECTORY, xsltSecurityForbid)) { 
+                               secPrefsError = 1;
+                       }
+               }
+               if (secPrefsIni & XSL_SECPREF_READ_NETWORK) { 
+                       if (0 != xsltSetSecurityPrefs(secPrefs, XSLT_SECPREF_READ_NETWORK, xsltSecurityForbid)) { 
+                               secPrefsError = 1;
+                       }
+               }
+               if (secPrefsIni & XSL_SECPREF_WRITE_NETWORK) { 
+                       if (0 != xsltSetSecurityPrefs(secPrefs, XSLT_SECPREF_WRITE_NETWORK, xsltSecurityForbid)) { 
+                               secPrefsError = 1;
+                       }
+               }
+       
+               if (0 != xsltSetCtxtSecurityPrefs(secPrefs, ctxt)) { 
+                       secPrefsError = 1;
+               }
+       }
+       
+       if (secPrefsError == 1) {
+               php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't set libxslt security properties, not doing transformation for security reasons");
+       } else {
+               newdocp = xsltApplyStylesheetUser(style, doc, (const char**) params,  NULL, NULL, ctxt);
+       }
 
 	xsltFreeTransformContext(ctxt);
+       if (secPrefs) {
+               xsltFreeSecurityPrefs(secPrefs);
+       }
 
 	if (intern->node_list != NULL) {
 		zend_hash_destroy(intern->node_list);
Index: ext/xsl/php_xsl.h
===================================================================
--- ext/xsl/php_xsl.h.orig
+++ ext/xsl/php_xsl.h
@@ -38,6 +38,7 @@ extern zend_module_entry xsl_module_entr
 #include <libxslt/xsltInternals.h>
 #include <libxslt/xsltutils.h>
 #include <libxslt/transform.h>
+#include <libxslt/security.h> 
 #if HAVE_XSL_EXSLT
 #include <libexslt/exslt.h>
 #include <libexslt/exsltconfig.h>
@@ -49,6 +50,13 @@ extern zend_module_entry xsl_module_entr
 #include <libxslt/extensions.h>
 #include <libxml/xpathInternals.h>
 
+#define XSL_SECPREF_NONE 0
+#define XSL_SECPREF_READ_FILE 2
+#define XSL_SECPREF_WRITE_FILE 4
+#define XSL_SECPREF_CREATE_DIRECTORY 8
+#define XSL_SECPREF_READ_NETWORK 16
+#define XSL_SECPREF_WRITE_NETWORK 32
+
 typedef struct _xsl_object {
 	zend_object  std;
 	void *ptr;
Index: ext/xsl/php_xsl.c
===================================================================
--- ext/xsl/php_xsl.c.orig
+++ ext/xsl/php_xsl.c
@@ -137,6 +137,11 @@ zend_object_value xsl_objects_new(zend_c
 }
 /* }}} */
 
+PHP_INI_BEGIN()
+//XSL_SECPREF_CREATE_DIRECTORY | XSL_SECPREF_WRITE_NETWORK |Â XSL_SECPREF_WRITE_FILE == 44
+PHP_INI_ENTRY("xsl.security_prefs", "44", PHP_INI_ALL, NULL)
+PHP_INI_END()
+
 /* {{{ PHP_MINIT_FUNCTION
  */
 PHP_MINIT_FUNCTION(xsl)
@@ -163,6 +168,13 @@ PHP_MINIT_FUNCTION(xsl)
 	REGISTER_LONG_CONSTANT("XSL_CLONE_NEVER",    -1,     CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("XSL_CLONE_ALWAYS",    1,     CONST_CS | CONST_PERSISTENT);
 
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_NONE",             XSL_SECPREF_NONE,             CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_READ_FILE",        XSL_SECPREF_READ_FILE,        CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_WRITE_FILE",       XSL_SECPREF_WRITE_FILE,       CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_CREATE_DIRECTORY", XSL_SECPREF_CREATE_DIRECTORY, CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_READ_NETWORK",     XSL_SECPREF_READ_NETWORK,     CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("XSL_SECPREF_WRITE_NETWORK",    XSL_SECPREF_WRITE_NETWORK,    CONST_CS | CONST_PERSISTENT);
+
 	REGISTER_LONG_CONSTANT("LIBXSLT_VERSION",           LIBXSLT_VERSION,            CONST_CS | CONST_PERSISTENT);
 	REGISTER_STRING_CONSTANT("LIBXSLT_DOTTED_VERSION",  LIBXSLT_DOTTED_VERSION,     CONST_CS | CONST_PERSISTENT);
 
@@ -171,6 +183,8 @@ PHP_MINIT_FUNCTION(xsl)
 	REGISTER_STRING_CONSTANT("LIBEXSLT_DOTTED_VERSION",  LIBEXSLT_DOTTED_VERSION,     CONST_CS | CONST_PERSISTENT);
 #endif
 
+    REGISTER_INI_ENTRIES();
+
 	return SUCCESS;
 }
 /* }}} */
@@ -257,6 +271,8 @@ PHP_MSHUTDOWN_FUNCTION(xsl)
 
 	xsltCleanupGlobals();
 
+	UNREGISTER_INI_ENTRIES();
+
 	return SUCCESS;
 }
 /* }}} */