[oe-commits] [openembedded-core] 04/43: libxml2: Fix CVE-2017-9047 and CVE-2017-9048
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git at git.openembedded.org
Thu Jul 27 21:37:59 UTC 2017
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rpurdie pushed a commit to branch pyro
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commit d549b8f3836b2ffda5c59a7ae4d955846c558646
Author: Andrej Valek <andrej.valek at siemens.com>
AuthorDate: Wed Jun 14 14:55:03 2017 +0200
libxml2: Fix CVE-2017-9047 and CVE-2017-9048
xmlSnprintfElementContent failed to correctly check the available
buffer space in two locations.
Fixes bug 781333 and bug 781701
CVE: CVE-2017-9047 CVE-2017-9048
(From OE-Core rev: bb0af023e811907b4e641b39f654ca921ac8794a)
Signed-off-by: Andrej Valek <andrej.valek at siemens.com>
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808 at gmail.com>
---
.../libxml2-CVE-2017-9047_CVE-2017-9048.patch | 103 +++++++++++++++++++++
meta/recipes-core/libxml/libxml2_2.9.4.bb | 1 +
2 files changed, 104 insertions(+)
diff --git a/meta/recipes-core/libxml/libxml2/libxml2-CVE-2017-9047_CVE-2017-9048.patch b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2017-9047_CVE-2017-9048.patch
new file mode 100644
index 0000000..8b03456
--- /dev/null
+++ b/meta/recipes-core/libxml/libxml2/libxml2-CVE-2017-9047_CVE-2017-9048.patch
@@ -0,0 +1,103 @@
+libxml2-2.9.4: Fix CVE-2017-9047 and CVE-2017-9048
+
+[No upstream tracking] -- https://bugzilla.gnome.org/show_bug.cgi?id=781333
+ -- https://bugzilla.gnome.org/show_bug.cgi?id=781701
+
+valid: Fix buffer size checks in xmlSnprintfElementContent
+
+xmlSnprintfElementContent failed to correctly check the available
+buffer space in two locations.
+
+Fixes bug 781333 and bug 781701
+
+Upstream-Status: Backport [https://git.gnome.org/browse/libxml2/commit/?id=932cc9896ab41475d4aa429c27d9afd175959d74]
+CVE: CVE-2017-9047 CVE-2017-9048
+Signed-off-by: Andrej Valek <andrej.valek at siemens.com>
+
+diff --git a/result/valid/781333.xml b/result/valid/781333.xml
+new file mode 100644
+index 0000000..01baf11
+--- /dev/null
++++ b/result/valid/781333.xml
+@@ -0,0 +1,5 @@
++<?xml version="1.0"?>
++<!DOCTYPE a [
++<!ELEMENT a (pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp [...]
++]>
++<a/>
+diff --git a/result/valid/781333.xml.err b/result/valid/781333.xml.err
+new file mode 100644
+index 0000000..2176200
+--- /dev/null
++++ b/result/valid/781333.xml.err
+@@ -0,0 +1,3 @@
++./test/valid/781333.xml:4: element a: validity error : Element a content does not follow the DTD, expecting ( ..., got
++<a/>
++ ^
+diff --git a/result/valid/781333.xml.err.rdr b/result/valid/781333.xml.err.rdr
+new file mode 100644
+index 0000000..1195a04
+--- /dev/null
++++ b/result/valid/781333.xml.err.rdr
+@@ -0,0 +1,6 @@
++./test/valid/781333.xml:4: element a: validity error : Element a content does not follow the DTD, expecting ( ..., got
++<a/>
++ ^
++./test/valid/781333.xml:5: element a: validity error : Element a content does not follow the DTD, Expecting more child
++
++^
+diff --git a/test/valid/781333.xml b/test/valid/781333.xml
+new file mode 100644
+index 0000000..bceac9c
+--- /dev/null
++++ b/test/valid/781333.xml
+@@ -0,0 +1,4 @@
++<!DOCTYPE a [
++ <!ELEMENT a (pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp [...]
++]>
++<a/>
+diff --git a/valid.c b/valid.c
+index 19f84b8..aaa30f6 100644
+--- a/valid.c
++++ b/valid.c
+@@ -1262,22 +1262,23 @@ xmlSnprintfElementContent(char *buf, int size, xmlElementContentPtr content, int
+ case XML_ELEMENT_CONTENT_PCDATA:
+ strcat(buf, "#PCDATA");
+ break;
+- case XML_ELEMENT_CONTENT_ELEMENT:
++ case XML_ELEMENT_CONTENT_ELEMENT: {
++ int qnameLen = xmlStrlen(content->name);
++
++ if (content->prefix != NULL)
++ qnameLen += xmlStrlen(content->prefix) + 1;
++ if (size - len < qnameLen + 10) {
++ strcat(buf, " ...");
++ return;
++ }
+ if (content->prefix != NULL) {
+- if (size - len < xmlStrlen(content->prefix) + 10) {
+- strcat(buf, " ...");
+- return;
+- }
+ strcat(buf, (char *) content->prefix);
+ strcat(buf, ":");
+ }
+- if (size - len < xmlStrlen(content->name) + 10) {
+- strcat(buf, " ...");
+- return;
+- }
+ if (content->name != NULL)
+ strcat(buf, (char *) content->name);
+ break;
++ }
+ case XML_ELEMENT_CONTENT_SEQ:
+ if ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
+ (content->c1->type == XML_ELEMENT_CONTENT_SEQ))
+@@ -1319,6 +1320,7 @@ xmlSnprintfElementContent(char *buf, int size, xmlElementContentPtr content, int
+ xmlSnprintfElementContent(buf, size, content->c2, 0);
+ break;
+ }
++ if (size - strlen(buf) <= 2) return;
+ if (englob)
+ strcat(buf, ")");
+ switch (content->ocur) {
diff --git a/meta/recipes-core/libxml/libxml2_2.9.4.bb b/meta/recipes-core/libxml/libxml2_2.9.4.bb
index c1f623a..8eaefd4 100644
--- a/meta/recipes-core/libxml/libxml2_2.9.4.bb
+++ b/meta/recipes-core/libxml/libxml2_2.9.4.bb
@@ -24,6 +24,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
file://libxml2-CVE-2016-4658.patch \
file://libxml2-fix_NULL_pointer_derefs.patch \
file://libxml2-fix_and_simplify_xmlParseStartTag2.patch \
+ file://libxml2-CVE-2017-9047_CVE-2017-9048.patch \
file://CVE-2016-9318.patch \
"
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