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- two patches for parsing problems CVE-2009-2414 and CVE-2009-2416 Daniel

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This commit is contained in:
Daniel Veillard 2009-08-10 14:21:33 +00:00
parent cb67b360f3
commit 9e00af6553
2 changed files with 164 additions and 0 deletions
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159
libxml2-2.7.3-ficora-parse.patch Normal file
View File

@ -0,0 +1,159 @@
diff --git a/parser.c b/parser.c
index a476060..b404722 100644
--- a/parser.c
+++ b/parser.c
@@ -5323,7 +5323,8 @@ xmlParseNotationType(xmlParserCtxtPtr ctxt) {
if (name == NULL) {
xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
"Name expected in NOTATION declaration\n");
- return(ret);
+ xmlFreeEnumeration(ret);
+ return(NULL);
}
tmp = ret;
while (tmp != NULL) {
@@ -5339,7 +5340,10 @@ xmlParseNotationType(xmlParserCtxtPtr ctxt) {
}
if (tmp == NULL) {
cur = xmlCreateEnumeration(name);
- if (cur == NULL) return(ret);
+ if (cur == NULL) {
+ xmlFreeEnumeration(ret);
+ return(NULL);
+ }
if (last == NULL) ret = last = cur;
else {
last->next = cur;
@@ -5350,9 +5354,8 @@ xmlParseNotationType(xmlParserCtxtPtr ctxt) {
} while (RAW == '|');
if (RAW != ')') {
xmlFatalErr(ctxt, XML_ERR_NOTATION_NOT_FINISHED, NULL);
- if ((last != NULL) && (last != ret))
- xmlFreeEnumeration(last);
- return(ret);
+ xmlFreeEnumeration(ret);
+ return(NULL);
}
NEXT;
return(ret);
@@ -5407,7 +5410,10 @@ xmlParseEnumerationType(xmlParserCtxtPtr ctxt) {
cur = xmlCreateEnumeration(name);
if (!xmlDictOwns(ctxt->dict, name))
xmlFree(name);
- if (cur == NULL) return(ret);
+ if (cur == NULL) {
+ xmlFreeEnumeration(ret);
+ return(NULL);
+ }
if (last == NULL) ret = last = cur;
else {
last->next = cur;
@@ -5775,9 +5781,10 @@ xmlParseElementMixedContentDecl(xmlParserCtxtPtr ctxt, int inputchk) {
}
/**
- * xmlParseElementChildrenContentDecl:
+ * xmlParseElementChildrenContentDeclPriv:
* @ctxt: an XML parser context
* @inputchk: the input used for the current entity, needed for boundary checks
+ * @depth: the level of recursion
*
* parse the declaration for a Mixed Element content
* The leading '(' and spaces have been skipped in xmlParseElementContentDecl
@@ -5805,12 +5812,20 @@ xmlParseElementMixedContentDecl(xmlParserCtxtPtr ctxt, int inputchk) {
* Returns the tree of xmlElementContentPtr describing the element
* hierarchy.
*/
-xmlElementContentPtr
-xmlParseElementChildrenContentDecl (xmlParserCtxtPtr ctxt, int inputchk) {
+static xmlElementContentPtr
+xmlParseElementChildrenContentDeclPriv(xmlParserCtxtPtr ctxt, int inputchk,
+ int depth) {
xmlElementContentPtr ret = NULL, cur = NULL, last = NULL, op = NULL;
const xmlChar *elem;
xmlChar type = 0;
+ if (((depth > 128) && ((ctxt->options & XML_PARSE_HUGE) == 0)) ||
+ (depth > 2048)) {
+ xmlFatalErrMsgInt(ctxt, XML_ERR_ELEMCONTENT_NOT_FINISHED,
+"xmlParseElementChildrenContentDecl : depth %d too deep, use XML_PARSE_HUGE\n",
+ depth);
+ return(NULL);
+ }
SKIP_BLANKS;
GROW;
if (RAW == '(') {
@@ -5819,7 +5834,8 @@ xmlParseElementChildrenContentDecl (xmlParserCtxtPtr ctxt, int inputchk) {
/* Recurse on first child */
NEXT;
SKIP_BLANKS;
- cur = ret = xmlParseElementChildrenContentDecl(ctxt, inputid);
+ cur = ret = xmlParseElementChildrenContentDeclPriv(ctxt, inputid,
+ depth + 1);
SKIP_BLANKS;
GROW;
} else {
@@ -5951,7 +5967,8 @@ xmlParseElementChildrenContentDecl (xmlParserCtxtPtr ctxt, int inputchk) {
/* Recurse on second child */
NEXT;
SKIP_BLANKS;
- last = xmlParseElementChildrenContentDecl(ctxt, inputid);
+ last = xmlParseElementChildrenContentDeclPriv(ctxt, inputid,
+ depth + 1);
SKIP_BLANKS;
} else {
elem = xmlParseName(ctxt);
@@ -6062,6 +6079,44 @@ xmlParseElementChildrenContentDecl (xmlParserCtxtPtr ctxt, int inputchk) {
}
/**
+ *
+ * xmlParseElementChildrenContentDecl:
+ * @ctxt: an XML parser context
+ * @inputchk: the input used for the current entity, needed for boundary checks
+ * @depth: the level of recursion
+ *
+ * parse the declaration for a Mixed Element content
+ * The leading '(' and spaces have been skipped in xmlParseElementContentDecl
+ *
+ * [47] children ::= (choice | seq) ('?' | '*' | '+')?
+ *
+ * [48] cp ::= (Name | choice | seq) ('?' | '*' | '+')?
+ *
+ * [49] choice ::= '(' S? cp ( S? '|' S? cp )* S? ')'
+ *
+ * [50] seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
+ *
+ * [ VC: Proper Group/PE Nesting ] applies to [49] and [50]
+ * TODO Parameter-entity replacement text must be properly nested
+ * with parenthesized groups. That is to say, if either of the
+ * opening or closing parentheses in a choice, seq, or Mixed
+ * construct is contained in the replacement text for a parameter
+ * entity, both must be contained in the same replacement text. For
+ * interoperability, if a parameter-entity reference appears in a
+ * choice, seq, or Mixed construct, its replacement text should not
+ * be empty, and neither the first nor last non-blank character of
+ * the replacement text should be a connector (| or ,).
+ *
+ * Returns the tree of xmlElementContentPtr describing the element
+ * hierarchy.
+ */
+xmlElementContentPtr
+xmlParseElementChildrenContentDecl(xmlParserCtxtPtr ctxt, int inputchk) {
+ /* stub left for API/ABI compat */
+ return(xmlParseElementChildrenContentDeclPriv(ctxt, inputchk, 1));
+}
+
+/**
* xmlParseElementContentDecl:
* @ctxt: an XML parser context
* @name: the name of the element being defined.
@@ -6097,7 +6152,7 @@ xmlParseElementContentDecl(xmlParserCtxtPtr ctxt, const xmlChar *name,
tree = xmlParseElementMixedContentDecl(ctxt, inputid);
res = XML_ELEMENT_TYPE_MIXED;
} else {
- tree = xmlParseElementChildrenContentDecl(ctxt, inputid);
+ tree = xmlParseElementChildrenContentDeclPriv(ctxt, inputid, 1);
res = XML_ELEMENT_TYPE_ELEMENT;
}
SKIP_BLANKS;

5
libxml2.spec
View File

@ -9,6 +9,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-root
BuildRequires: python python-devel zlib-devel pkgconfig
URL: http://xmlsoft.org/
Patch0: libxml2-multilib.patch
Patch1: libxml2-2.7.3-ficora-parse.patch
%description
This library allows to manipulate XML files. It includes support
@ -67,6 +68,7 @@ at parse time or later once the document has been modified.
%prep
%setup -q
%patch0 -p1
%patch1 -p1
%build
%configure
@ -141,6 +143,9 @@ rm -fr %{buildroot}
%doc doc/python.html
%changelog
* Mon Aug 10 2009 Daniel Veillard <veillard@redhat.com> - 2.7.3-4.fc11
- two patches for parsing problems CVE-2009-2414 and CVE-2009-2416
* Sat Jul 25 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.7.3-3
- Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild