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diff -uPr xmlsec1-1.2.20/apps/xmlsec.c xmlsec1-1.2.20-CVE-2017-1000061/apps/xmlsec.c
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--- xmlsec1-1.2.20/apps/xmlsec.c 2017-08-09 12:45:45.246669522 -0400
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+++ xmlsec1-1.2.20-CVE-2017-1000061/apps/xmlsec.c 2017-07-18 12:21:59.554749331 -0400
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@@ -528,6 +528,19 @@
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NULL
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};
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+static xmlSecAppCmdLineParam xxeParam = {
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+ xmlSecAppCmdLineTopicAll,
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+ "--xxe",
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+ NULL,
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+ "--xxe"
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+ "\n\tenable External Entity resolution."
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+ "\n\tWARNING: this may allow the reading of arbitrary files and URLs,"
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+ "\n\tcontrolled by the input XML document. Use with caution!",
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+ xmlSecAppCmdLineParamTypeFlag,
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+ xmlSecAppCmdLineParamFlagNone,
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+ NULL
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+};
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+
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/****************************************************************
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*
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@@ -904,6 +917,7 @@
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&disableErrorMsgsParam,
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&printCryptoErrorMsgsParam,
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&helpParam,
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+ &xxeParam,
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/* MUST be the last one */
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NULL
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@@ -1087,6 +1101,11 @@
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430364 |
goto fail;
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430364 |
}
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430364 |
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430364 |
+ /* enable XXE? */
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430364 |
+ if(xmlSecAppCmdLineParamIsSet(&xxeParam)) {
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430364 |
+ xmlSecSetExternalEntityLoader( NULL ); // reset to libxml2's default handler
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430364 |
+ }
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430364 |
+
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430364 |
/* get the "repeats" number */
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430364 |
if(xmlSecAppCmdLineParamIsSet(&repeatParam) &&
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430364 |
(xmlSecAppCmdLineParamGetInt(&repeatParam, 1) > 0)) {
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430364 |
diff -uPr xmlsec1-1.2.20/include/xmlsec/xmlsec.h xmlsec1-1.2.20-CVE-2017-1000061/include/xmlsec/xmlsec.h
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430364 |
--- xmlsec1-1.2.20/include/xmlsec/xmlsec.h 2014-05-27 14:29:01.000000000 -0400
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430364 |
+++ xmlsec1-1.2.20-CVE-2017-1000061/include/xmlsec/xmlsec.h 2017-07-18 12:21:59.555749324 -0400
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430364 |
@@ -89,6 +89,7 @@
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430364 |
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430364 |
XMLSEC_EXPORT int xmlSecInit (void);
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430364 |
XMLSEC_EXPORT int xmlSecShutdown (void);
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430364 |
+XMLSEC_EXPORT void xmlSecSetExternalEntityLoader (xmlExternalEntityLoader);
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430364 |
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430364 |
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430364 |
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430364 |
diff -uPr xmlsec1-1.2.20/src/xmlsec.c xmlsec1-1.2.20-CVE-2017-1000061/src/xmlsec.c
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430364 |
--- xmlsec1-1.2.20/src/xmlsec.c 2014-05-27 14:29:01.000000000 -0400
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430364 |
+++ xmlsec1-1.2.20-CVE-2017-1000061/src/xmlsec.c 2017-08-09 12:44:03.386416274 -0400
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430364 |
@@ -25,6 +25,56 @@
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430364 |
#include <xmlsec/errors.h>
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430364 |
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430364 |
/**
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430364 |
+ * Custom external entity handler, denies all files except the initial
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430364 |
+ * document we're parsing (input_id == 1)
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430364 |
+ */
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430364 |
+/* default external entity loader, pointer saved during xmlInit */
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430364 |
+static xmlExternalEntityLoader
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430364 |
+xmlSecDefaultExternalEntityLoader = NULL;
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430364 |
+
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430364 |
+/*
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430364 |
+ * xmlSecNoXxeExternalEntityLoader:
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430364 |
+ * @URL: the URL for the entity to load
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430364 |
+ * @ID: public ID for the entity to load
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430364 |
+ * @ctxt: XML parser context, or NULL
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430364 |
+ *
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430364 |
+ * See libxml2's xmlLoadExternalEntity and xmlNoNetExternalEntityLoader.
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430364 |
+ * This function prevents any external (file or network) entities from being loaded.
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430364 |
+ */
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430364 |
+static xmlParserInputPtr
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430364 |
+xmlSecNoXxeExternalEntityLoader(const char *URL, const char *ID,
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430364 |
+ xmlParserCtxtPtr ctxt) {
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430364 |
+ if (ctxt == NULL) {
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430364 |
+ return(NULL);
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430364 |
+ }
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430364 |
+ if (ctxt->input_id == 1) {
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430364 |
+ return xmlSecDefaultExternalEntityLoader((const char *) URL, ID, ctxt);
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|
430364 |
+ }
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430364 |
+ xmlSecError(XMLSEC_ERRORS_HERE,
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430364 |
+ NULL,
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430364 |
+ "xmlSecNoXxeExternalEntityLoader",
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430364 |
+ XMLSEC_ERRORS_R_XML_FAILED,
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430364 |
+ "illegal external entity='%s'", xmlSecErrorsSafeString(URL));
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430364 |
+ return(NULL);
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430364 |
+}
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430364 |
+
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430364 |
+/*
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430364 |
+ * xmlSecSetExternalEntityLoader:
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430364 |
+ * @entityLoader: the new entity resolver function, or NULL to restore
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430364 |
+ * libxml2's default handler
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430364 |
+ *
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430364 |
+ * Wrapper for xmlSetExternalEntityLoader.
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430364 |
+ */
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430364 |
+void
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430364 |
+xmlSecSetExternalEntityLoader(xmlExternalEntityLoader entityLoader) {
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430364 |
+ if (entityLoader == NULL) {
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430364 |
+ entityLoader = xmlSecDefaultExternalEntityLoader;
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|
430364 |
+ }
|
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|
430364 |
+ xmlSetExternalEntityLoader(entityLoader);
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|
|
430364 |
+}
|
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|
430364 |
+
|
|
|
430364 |
+
|
|
|
430364 |
+/**
|
|
|
430364 |
* xmlSecInit:
|
|
|
430364 |
*
|
|
|
430364 |
* Initializes XML Security Library. The depended libraries
|
|
|
430364 |
@@ -85,6 +135,12 @@
|
|
|
430364 |
}
|
|
|
430364 |
#endif /* XMLSEC_NO_XKMS */
|
|
|
430364 |
|
|
|
430364 |
+ /* initialise safe external entity loader */
|
|
|
430364 |
+ if (!xmlSecDefaultExternalEntityLoader) {
|
|
|
430364 |
+ xmlSecDefaultExternalEntityLoader = xmlGetExternalEntityLoader();
|
|
|
430364 |
+ }
|
|
|
430364 |
+ xmlSetExternalEntityLoader(xmlSecNoXxeExternalEntityLoader);
|
|
|
430364 |
+
|
|
|
430364 |
/* we use rand() function to generate id attributes */
|
|
|
430364 |
srand(time(NULL));
|
|
|
430364 |
return(0);
|
|
|
430364 |
@@ -182,4 +238,3 @@
|
|
|
430364 |
return(1);
|
|
|
430364 |
}
|
|
|
430364 |
|
|
|
430364 |
-
|