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26ab554fd5
Fixes CVE-2018-14647, CVE-2018-20406, CVE-2018-20852, CVE-2019-9636, CVE-2019-9740, and CVE-2019-9747. (From OE-Core rev: 5862716f22ca9f5745d3bca85c6ed0d8c35c437b) Signed-off-by: Dan Tran <dantran@microsoft.com> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
96 lines
3.6 KiB
Diff
96 lines
3.6 KiB
Diff
From 610b4b0dbaedd3099ab76acf678e9cc845d99a76 Mon Sep 17 00:00:00 2001
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From: stratakis <cstratak@redhat.com>
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Date: Mon, 25 Feb 2019 22:04:09 +0100
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Subject: [PATCH] [3.5] bpo-34623: Use XML_SetHashSalt in _elementtree (#9933)
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* bpo-34623: Use XML_SetHashSalt in _elementtree (GH-9146)
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The C accelerated _elementtree module now initializes hash randomization
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salt from _Py_HashSecret instead of libexpat's default CPRNG.
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Signed-off-by: Christian Heimes <christian@python.org>
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https://bugs.python.org/issue34623
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(cherry picked from commit cb5778f00ce48631c7140f33ba242496aaf7102b)
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Co-authored-by: Christian Heimes <christian@python.org>
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CVE: CVE-2018-14647
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Upstream-Status: Backport
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[https://github.com/python/cpython/commit/41b48e71ac8a71f56694b548f118bd20ce203410]
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Signed-off-by: Dan Tran <dantran@microsoft.com>
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---
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Include/pyexpat.h | 4 +++-
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.../next/Security/2018-09-10-16-05-39.bpo-34623.Ua9jMv.rst | 2 ++
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Modules/_elementtree.c | 5 +++++
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Modules/pyexpat.c | 5 +++++
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4 files changed, 15 insertions(+), 1 deletion(-)
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create mode 100644 Misc/NEWS.d/next/Security/2018-09-10-16-05-39.bpo-34623.Ua9jMv.rst
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diff --git a/Include/pyexpat.h b/Include/pyexpat.h
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index 44259bf6d7..07020b5dc9 100644
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--- a/Include/pyexpat.h
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+++ b/Include/pyexpat.h
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@@ -3,7 +3,7 @@
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/* note: you must import expat.h before importing this module! */
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-#define PyExpat_CAPI_MAGIC "pyexpat.expat_CAPI 1.0"
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+#define PyExpat_CAPI_MAGIC "pyexpat.expat_CAPI 1.1"
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#define PyExpat_CAPSULE_NAME "pyexpat.expat_CAPI"
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struct PyExpat_CAPI
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@@ -48,6 +48,8 @@ struct PyExpat_CAPI
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enum XML_Status (*SetEncoding)(XML_Parser parser, const XML_Char *encoding);
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int (*DefaultUnknownEncodingHandler)(
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void *encodingHandlerData, const XML_Char *name, XML_Encoding *info);
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+ /* might be none for expat < 2.1.0 */
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+ int (*SetHashSalt)(XML_Parser parser, unsigned long hash_salt);
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/* always add new stuff to the end! */
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};
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diff --git a/Misc/NEWS.d/next/Security/2018-09-10-16-05-39.bpo-34623.Ua9jMv.rst b/Misc/NEWS.d/next/Security/2018-09-10-16-05-39.bpo-34623.Ua9jMv.rst
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new file mode 100644
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index 0000000000..cbaa4b7506
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--- /dev/null
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+++ b/Misc/NEWS.d/next/Security/2018-09-10-16-05-39.bpo-34623.Ua9jMv.rst
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@@ -0,0 +1,2 @@
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+CVE-2018-14647: The C accelerated _elementtree module now initializes hash
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+randomization salt from _Py_HashSecret instead of libexpat's default CSPRNG.
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diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
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index 5dba9f70a9..90c6daf64a 100644
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--- a/Modules/_elementtree.c
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+++ b/Modules/_elementtree.c
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@@ -3282,6 +3282,11 @@ _elementtree_XMLParser___init___impl(XMLParserObject *self, PyObject *html,
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PyErr_NoMemory();
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return -1;
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}
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+ /* expat < 2.1.0 has no XML_SetHashSalt() */
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+ if (EXPAT(SetHashSalt) != NULL) {
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+ EXPAT(SetHashSalt)(self->parser,
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+ (unsigned long)_Py_HashSecret.expat.hashsalt);
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+ }
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if (target) {
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Py_INCREF(target);
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diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
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index adc9b6cde8..948ab1b703 100644
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--- a/Modules/pyexpat.c
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+++ b/Modules/pyexpat.c
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@@ -1882,6 +1882,11 @@ MODULE_INITFUNC(void)
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capi.SetStartDoctypeDeclHandler = XML_SetStartDoctypeDeclHandler;
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capi.SetEncoding = XML_SetEncoding;
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capi.DefaultUnknownEncodingHandler = PyUnknownEncodingHandler;
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+#if XML_COMBINED_VERSION >= 20100
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+ capi.SetHashSalt = XML_SetHashSalt;
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+#else
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+ capi.SetHashSalt = NULL;
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+#endif
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/* export using capsule */
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capi_object = PyCapsule_New(&capi, PyExpat_CAPSULE_NAME, NULL);
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--
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2.22.0.vfs.1.1.57.gbaf16c8
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