From: Narpat Mali <[email protected]> Sqlalchemy mako before 1.2.2 is vulnerable to Regular expression Denial of Service when using the Lexer class to parse. This also affects babelplugin and linguaplugin.
Reference: https://nvd.nist.gov/vuln/detail/CVE-2022-40023 Reference to Upstream Patch: https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c Signed-off-by: Narpat Mali <[email protected]> Signed-off-by: Steve Sakoman <[email protected]> --- .../python/python3-mako/CVE-2022-40023.patch | 119 ++++++++++++++++++ .../python/python3-mako_1.1.6.bb | 2 + 2 files changed, 121 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-mako/CVE-2022-40023.patch diff --git a/meta/recipes-devtools/python/python3-mako/CVE-2022-40023.patch b/meta/recipes-devtools/python/python3-mako/CVE-2022-40023.patch new file mode 100644 index 0000000000..66690e74b4 --- /dev/null +++ b/meta/recipes-devtools/python/python3-mako/CVE-2022-40023.patch @@ -0,0 +1,119 @@ +From 925760291d6efec64fda6e9dd1fd9cfbd5be068c Mon Sep 17 00:00:00 2001 +From: Mike Bayer <[email protected]> +Date: Mon, 29 Aug 2022 12:28:52 -0400 +Subject: [PATCH] fix tag regexp to match quoted groups correctly + +Fixed issue in lexer where the regexp used to match tags would not +correctly interpret quoted sections individually. While this parsing issue +still produced the same expected tag structure later on, the mis-handling +of quoted sections was also subject to a regexp crash if a tag had a large +number of quotes within its quoted sections. + +Fixes: #366 +Change-Id: I74e0d71ff7f419970711a7cd51adcf1bb90a44c0 + +Upstream-Status: Backport [https://github.com/sqlalchemy/mako/commit/925760291d6efec64fda6e9dd1fd9cfbd5be068c] + +Signed-off-by: <[email protected]> + +--- + doc/build/unreleased/366.rst | 9 +++++++++ + mako/lexer.py | 12 ++++++++---- + test/test_lexer.py | 21 +++++++++++++++++---- + 3 files changed, 34 insertions(+), 8 deletions(-) + create mode 100644 doc/build/unreleased/366.rst + +--- /dev/null ++++ Mako-1.1.6/doc/build/unreleased/366.rst +@@ -0,0 +1,9 @@ ++.. change:: ++ :tags: bug, lexer ++ :tickets: 366 ++ ++ Fixed issue in lexer where the regexp used to match tags would not ++ correctly interpret quoted sections individually. While this parsing issue ++ still produced the same expected tag structure later on, the mis-handling ++ of quoted sections was also subject to a regexp crash if a tag had a large ++ number of quotes within its quoted sections. +\ No newline at end of file +--- Mako-1.1.6.orig/mako/lexer.py ++++ Mako-1.1.6/mako/lexer.py +@@ -295,20 +295,24 @@ class Lexer(object): + return self.template + + def match_tag_start(self): +- match = self.match( +- r""" ++ reg = r""" + \<% # opening tag + + ([\w\.\:]+) # keyword + +- ((?:\s+\w+|\s*=\s*|".*?"|'.*?')*) # attrname, = \ ++ ((?:\s+\w+|\s*=\s*|"[^"]*?"|'[^']*?'|\s*,\s*)*) # attrname, = \ + # sign, string expression ++ # comma is for backwards compat ++ # identified in #366 + + \s* # more whitespace + + (/)?> # closing + +- """, ++ """ ++ ++ match = self.match( ++ reg, + re.I | re.S | re.X, + ) + +--- Mako-1.1.6.orig/test/test_lexer.py ++++ Mako-1.1.6/test/test_lexer.py +@@ -1,5 +1,7 @@ + import re + ++import pytest ++ + from mako import compat + from mako import exceptions + from mako import parsetree +@@ -146,6 +148,10 @@ class LexerTest(TemplateTest): + """ + self.assertRaises(exceptions.CompileException, Lexer(template).parse) + ++ def test_tag_many_quotes(self): ++ template = "<%0" + '"' * 3000 ++ assert_raises(exceptions.SyntaxException, Lexer(template).parse) ++ + def test_unmatched_tag(self): + template = """ + <%namespace name="bar"> +@@ -432,9 +438,16 @@ class LexerTest(TemplateTest): + ), + ) + +- def test_pagetag(self): +- template = """ +- <%page cached="True", args="a, b"/> ++ @pytest.mark.parametrize("comma,numchars", [(",", 48), ("", 47)]) ++ def test_pagetag(self, comma, numchars): ++ # note that the comma here looks like: ++ # <%page cached="True", args="a, b"/> ++ # that's what this test has looked like for decades, however, the ++ # comma there is not actually the right syntax. When issue #366 ++ # was fixed, the reg was altered to accommodate for this comma to allow ++ # backwards compat ++ template = f""" ++ <%page cached="True"{comma} args="a, b"/> + + some template + """ +@@ -453,7 +466,7 @@ class LexerTest(TemplateTest): + + some template + """, +- (2, 48), ++ (2, numchars), + ), + ], + ), diff --git a/meta/recipes-devtools/python/python3-mako_1.1.6.bb b/meta/recipes-devtools/python/python3-mako_1.1.6.bb index 71e5d96ba1..4e4f33f5dc 100644 --- a/meta/recipes-devtools/python/python3-mako_1.1.6.bb +++ b/meta/recipes-devtools/python/python3-mako_1.1.6.bb @@ -6,6 +6,8 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=943eb67718222db21d44a4ef1836675f" PYPI_PACKAGE = "Mako" +SRC_URI += "file://CVE-2022-40023.patch" + inherit pypi python_setuptools_build_meta SRC_URI[sha256sum] = "4e9e345a41924a954251b95b4b28e14a301145b544901332e658907a7464b6b2" -- 2.25.1
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