fix python-jinja2 for CVE-2024-34064 (#9188)
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From 5dcbbc98a404f70b4cedc8b3ff92a1859cc4cce5 Mon Sep 17 00:00:00 2001
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From: Sudipta Pandit <sudpandit@microsoft.com>
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Date: Wed, 22 May 2024 16:44:03 +0530
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Subject: [PATCH] Backport upstream change for CVE-2024-34064
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Backported from https://github.com/pallets/jinja/commit/0668239dc6b44ef38e7a6c9f91f312fd4ca581cb
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based on existing patch for CVE-2024-22195
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Original patch:
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From d655030770081e2dfe46f90e27620472a502289d Mon Sep 17 00:00:00 2001
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From: David Lord <davidism@gmail.com>
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Date: Thu, 2 May 2024 09:14:00 -0700
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Subject: [PATCH] disallow invalid characters in keys to xmlattr filter
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---
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src/jinja2/filters.py | 22 +++++++++++++++++-----
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tests/test_filters.py | 11 ++++++-----
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2 files changed, 23 insertions(+), 10 deletions(-)
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diff --git a/src/jinja2/filters.py b/src/jinja2/filters.py
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index 4f90bfe..28199e1 100644
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--- a/src/jinja2/filters.py
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+++ b/src/jinja2/filters.py
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@@ -271,7 +271,9 @@ def do_lower(s: str) -> str:
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return soft_str(s).lower()
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-_space_re = re.compile(r"\s", flags=re.ASCII)
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+# Check for characters that would move the parser state from key to value.
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+# https://html.spec.whatwg.org/#attribute-name-state
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+_attr_key_re = re.compile(r"[\s/>=]", flags=re.ASCII)
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@pass_eval_context
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@@ -282,8 +284,14 @@ def do_xmlattr(
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All values that are neither `none` nor `undefined` are automatically
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escaped:
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- If any key contains a space, this fails with a ``ValueError``. Values that
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- are neither ``none`` nor ``undefined`` are automatically escaped.
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+ **Values** that are neither ``none`` nor ``undefined`` are automatically
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+ escaped, safely allowing untrusted user input.
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+
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+ User input should not be used as **keys** to this filter. If any key
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+ contains a space, ``/`` solidus, ``>`` greater-than sign, or ``=`` equals
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+ sign, this fails with a ``ValueError``. Regardless of this, user input
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+ should never be used as keys to this filter, or must be separately validated
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+ first.
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.. sourcecode:: html+jinja
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@@ -303,6 +311,10 @@ def do_xmlattr(
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As you can see it automatically prepends a space in front of the item
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if the filter returned something unless the second parameter is false.
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+ .. versionchanged:: 3.1.4
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+ Keys with ``/`` solidus, ``>`` greater-than sign, or ``=`` equals sign
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+ are not allowed.
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+
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.. versionchanged:: 3.1.3
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Keys with spaces are not allowed. (patched for 3.0.3)
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"""
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@@ -312,8 +324,8 @@ def do_xmlattr(
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if value is None or isinstance(value, Undefined):
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continue
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- if _space_re.search(key) is not None:
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- raise ValueError(f"Spaces are not allowed in attributes: '{key}'")
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+ if _attr_key_re.search(key) is not None:
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+ raise ValueError(f"Invalid character in attribute name: {key!r}")
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items.append(f'{escape(key)}="{escape(value)}"')
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diff --git a/tests/test_filters.py b/tests/test_filters.py
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index 45843fd..6533370 100644
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--- a/tests/test_filters.py
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+++ b/tests/test_filters.py
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@@ -463,11 +463,12 @@ class TestFilter:
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assert 'bar="23"' in out
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assert 'blub:blub="<?>"' in out
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- def test_xmlattr_key_with_spaces(self, env):
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- with pytest.raises(ValueError, match="Spaces are not allowed"):
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- env.from_string(
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- "{{ {'src=1 onerror=alert(1)': 'my_class'}|xmlattr }}"
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- ).render()
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+ @pytest.mark.parametrize("sep", ("\t", "\n", "\f", " ", "/", ">", "="))
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+ def test_xmlattr_key_invalid(self, env: Environment, sep: str) -> None:
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+ with pytest.raises(ValueError, match="Invalid character"):
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+ env.from_string("{{ {key: 'my_class'}|xmlattr }}").render(
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+ key=f"class{sep}onclick=alert(1)"
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+ )
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def test_sort1(self, env):
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tmpl = env.from_string("{{ [2, 3, 1]|sort }}|{{ [2, 3, 1]|sort(true) }}")
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--
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2.34.1
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@ -1,7 +1,7 @@
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Summary: A fast and easy to use template engine written in pure Python
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Name: python-jinja2
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Version: 3.0.3
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Release: 3%{?dist}
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Release: 4%{?dist}
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License: BSD
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Vendor: Microsoft Corporation
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Distribution: Mariner
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@ -9,6 +9,7 @@ Group: Development/Languages/Python
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URL: https://jinja.pocoo.org/
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Source0: https://files.pythonhosted.org/packages/91/a5/429efc6246119e1e3fbf562c00187d04e83e54619249eb732bb423efa6c6/Jinja2-%{version}.tar.gz
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Patch0: CVE-2024-22195.patch
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Patch1: CVE-2024-34064.patch
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BuildArch: noarch
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%description
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@ -54,6 +55,9 @@ tox -e py%{python3_version_nodots}
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%{python3_sitelib}/Jinja2-%{version}-py%{python3_version}.egg-info
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%changelog
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* Wed May 22 2024 Sudipta Pandit <sudpandit@microsoft.com> - 3.0.3-4
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- Backport CVE-2024-34064 from upstream (based on previous backport of CVE-2024-22195)
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* Wed Jan 24 2024 Tobias Brick <tobiasb@microsoft.com> - 3.0.3-3
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- Backport CVE-2024-22195 from upstream
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@ -518,7 +518,7 @@ python3-Cython-0.29.33-2.cm2.aarch64.rpm
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python3-debuginfo-3.9.19-1.cm2.aarch64.rpm
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python3-devel-3.9.19-1.cm2.aarch64.rpm
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python3-gpg-1.16.0-2.cm2.aarch64.rpm
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python3-jinja2-3.0.3-3.cm2.noarch.rpm
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python3-jinja2-3.0.3-4.cm2.noarch.rpm
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python3-libcap-ng-0.8.2-2.cm2.aarch64.rpm
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python3-libs-3.9.19-1.cm2.aarch64.rpm
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python3-libxml2-2.10.4-3.cm2.aarch64.rpm
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@ -524,7 +524,7 @@ python3-Cython-0.29.33-2.cm2.x86_64.rpm
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python3-debuginfo-3.9.19-1.cm2.x86_64.rpm
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python3-devel-3.9.19-1.cm2.x86_64.rpm
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python3-gpg-1.16.0-2.cm2.x86_64.rpm
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python3-jinja2-3.0.3-3.cm2.noarch.rpm
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python3-jinja2-3.0.3-4.cm2.noarch.rpm
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python3-libcap-ng-0.8.2-2.cm2.x86_64.rpm
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python3-libs-3.9.19-1.cm2.x86_64.rpm
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python3-libxml2-2.10.4-3.cm2.x86_64.rpm
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