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163 lines
5.5 KiB
163 lines
5.5 KiB
From 9f6aa6b5f06ecfcfea2084d88f377c6e9dba5ce2 Mon Sep 17 00:00:00 2001
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From: Ryan Petrello <rpetrell@redhat.com>
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Date: Tue, 30 Apr 2019 12:36:48 -0400
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Subject: [PATCH 1/3] prevent CVE-2019-9740 in 1.24.x
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adapted from https://github.com/python/cpython/pull/12755
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---
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test/test_util.py | 5 +++++
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src/urllib3/util/url.py | 8 ++++++++
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2 files changed, 13 insertions(+)
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diff --git a/test/test_util.py b/test/test_util.py
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index 73d9452..dc6ffd0 100644
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--- a/test/test_util.py
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+++ b/test/test_util.py
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@@ -200,6 +200,11 @@ class TestUtil(object):
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with pytest.raises(ValueError):
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parse_url('[::1')
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+ def test_parse_url_contains_control_characters(self):
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+ # see CVE-2019-9740
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+ with pytest.raises(LocationParseError):
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+ parse_url('http://localhost:8000/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:')
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+
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def test_Url_str(self):
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U = Url('http', host='google.com')
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assert str(U) == U.url
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diff --git a/src/urllib3/util/url.py b/src/urllib3/util/url.py
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index 6b6f996..e8e1bd7 100644
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--- a/src/urllib3/util/url.py
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+++ b/src/urllib3/util/url.py
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@@ -1,5 +1,6 @@
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from __future__ import absolute_import
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from collections import namedtuple
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+import re
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from ..exceptions import LocationParseError
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@@ -10,6 +11,8 @@ url_attrs = ['scheme', 'auth', 'host', 'port', 'path', 'query', 'fragment']
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# urllib3 infers URLs without a scheme (None) to be http.
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NORMALIZABLE_SCHEMES = ('http', 'https', None)
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+_contains_disallowed_url_pchar_re = re.compile('[\x00-\x20\x7f]')
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+
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class Url(namedtuple('Url', url_attrs)):
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"""
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@@ -155,6 +158,11 @@ def parse_url(url):
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# Empty
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return Url()
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+ # Prevent CVE-2019-9740.
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+ # adapted from https://github.com/python/cpython/pull/12755
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+ if _contains_disallowed_url_pchar_re.search(url):
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+ raise LocationParseError("URL can't contain control characters. {!r}".format(url))
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+
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scheme = None
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auth = None
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host = None
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--
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2.20.1
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From ecc15bd412354ad916712113b0e426f8bc6cf52d Mon Sep 17 00:00:00 2001
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From: Ryan Petrello <lists@ryanpetrello.com>
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Date: Wed, 1 May 2019 16:46:44 -0400
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Subject: [PATCH 2/3] avoid CVE-2019-9740 by percent-encoding invalid path
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characters
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this is to avoid breaking changes in downstream libraries like requests
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---
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test/test_util.py | 4 ++--
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src/urllib3/util/url.py | 4 ++--
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2 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/test/test_util.py b/test/test_util.py
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index dc6ffd0..d139329 100644
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--- a/test/test_util.py
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+++ b/test/test_util.py
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@@ -202,8 +202,8 @@ class TestUtil(object):
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def test_parse_url_contains_control_characters(self):
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# see CVE-2019-9740
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- with pytest.raises(LocationParseError):
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- parse_url('http://localhost:8000/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:')
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+ url = parse_url('http://localhost:8000/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:')
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+ assert url.path == '/%20HTTP/1.1%0D%0AHEADER:%20INJECTED%0D%0AIgnore:'
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def test_Url_str(self):
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U = Url('http', host='google.com')
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diff --git a/src/urllib3/util/url.py b/src/urllib3/util/url.py
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index e8e1bd7..12b8d55 100644
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--- a/src/urllib3/util/url.py
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+++ b/src/urllib3/util/url.py
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@@ -3,6 +3,7 @@ from collections import namedtuple
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import re
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from ..exceptions import LocationParseError
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+from ..packages.six.moves.urllib.parse import quote
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url_attrs = ['scheme', 'auth', 'host', 'port', 'path', 'query', 'fragment']
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@@ -160,8 +161,7 @@ def parse_url(url):
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# Prevent CVE-2019-9740.
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# adapted from https://github.com/python/cpython/pull/12755
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- if _contains_disallowed_url_pchar_re.search(url):
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- raise LocationParseError("URL can't contain control characters. {!r}".format(url))
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+ url = _contains_disallowed_url_pchar_re.sub(lambda match: quote(match.group()), url)
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scheme = None
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auth = None
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--
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2.20.1
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From 6cda449df587fd37135ee76a9253dc8e12e53c05 Mon Sep 17 00:00:00 2001
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From: Seth Michael Larson <sethmichaellarson@gmail.com>
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Date: Thu, 2 May 2019 09:02:24 -0500
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Subject: [PATCH 3/3] Also test unicode and query
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---
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test/test_util.py | 22 +++++++++++++++++++---
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1 file changed, 19 insertions(+), 3 deletions(-)
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diff --git a/test/test_util.py b/test/test_util.py
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index d139329..fa53aaf 100644
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--- a/test/test_util.py
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+++ b/test/test_util.py
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@@ -200,10 +200,26 @@ class TestUtil(object):
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with pytest.raises(ValueError):
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parse_url('[::1')
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- def test_parse_url_contains_control_characters(self):
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+ @pytest.mark.parametrize('url, expected_url', [
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+ (
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+ 'http://localhost/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:',
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+ Url('http', host='localhost', port=None,
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+ path='/%20HTTP/1.1%0D%0AHEADER:%20INJECTED%0D%0AIgnore:')
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+ ),
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+ (
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+ u'http://localhost/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:',
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+ Url('http', host='localhost', port=None,
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+ path='/%20HTTP/1.1%0D%0AHEADER:%20INJECTED%0D%0AIgnore:')
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+ ),
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+ (
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+ 'http://localhost/ ?q=\r\n',
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+ Url('http', host='localhost', path='/%20', query='q=%0D%0A')
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+ ),
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+ ])
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+ def test_parse_url_contains_control_characters(self, url, expected_url):
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# see CVE-2019-9740
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- url = parse_url('http://localhost:8000/ HTTP/1.1\r\nHEADER: INJECTED\r\nIgnore:')
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- assert url.path == '/%20HTTP/1.1%0D%0AHEADER:%20INJECTED%0D%0AIgnore:'
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+ url = parse_url(url)
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+ assert url == expected_url
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def test_Url_str(self):
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U = Url('http', host='google.com')
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--
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2.20.1
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