Hello, On 16/11/2022 10:55:23+0530, omkar wrote: > From: Omkar <[email protected]> > > Fix CVE-2022-45061, referenced as > https://github.com/python/cpython/issues/98433 > patch taken from > https://github.com/python/cpython/pull/99231/commits/064ec20bf7a181ba5fa961aaa12973812aa6ca5d > > Signed-off-by: Omkar <[email protected]> > --- > .../python/files/CVE-2022-45061.patch | 100 ++++++++++++++++++ > .../recipes-devtools/python/python3_3.8.14.bb | 1 +
master has python 3.11.0, can you rebase? > 2 files changed, 101 insertions(+) > create mode 100644 meta/recipes-devtools/python/files/CVE-2022-45061.patch > > diff --git a/meta/recipes-devtools/python/files/CVE-2022-45061.patch > b/meta/recipes-devtools/python/files/CVE-2022-45061.patch > new file mode 100644 > index 0000000000..647bf59908 > --- /dev/null > +++ b/meta/recipes-devtools/python/files/CVE-2022-45061.patch > @@ -0,0 +1,100 @@ > +From 064ec20bf7a181ba5fa961aaa12973812aa6ca5d Mon Sep 17 00:00:00 2001 > +From: "Miss Islington (bot)" > + <[email protected]> > +Date: Mon, 7 Nov 2022 18:57:10 -0800 > +Subject: [PATCH] [3.11] gh-98433: Fix quadratic time idna decoding. > (GH-99092) > + (GH-99222) > + > +There was an unnecessary quadratic loop in idna decoding. This restores > +the behavior to linear. > + > +(cherry picked from commit d315722564927c7202dd6e111dc79eaf14240b0d) > + > +(cherry picked from commit a6f6c3a3d6f2b580f2d87885c9b8a9350ad7bf15) > + > +Co-authored-by: Miss Islington (bot) > <[email protected]> > +Co-authored-by: Gregory P. Smith <[email protected]> > + > +CVE: CVE-2022-45061 > +Upstream-Status: Backport > [https://github.com/python/cpython/pull/99231/commits/064ec20bf7a181ba5fa961aaa12973812aa6ca5d] > +Signed-off-by: Omkar Patil <[email protected]> > + > +--- > + Lib/encodings/idna.py | 32 +++++++++---------- > + Lib/test/test_codecs.py | 6 ++++ > + ...2-11-04-09-29-36.gh-issue-98433.l76c5G.rst | 6 ++++ > + 3 files changed, 27 insertions(+), 17 deletions(-) > + create mode 100644 > Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst > + > +diff --git a/Lib/encodings/idna.py b/Lib/encodings/idna.py > +index ea4058512fe3..bf98f513366b 100644 > +--- a/Lib/encodings/idna.py > ++++ b/Lib/encodings/idna.py > +@@ -39,23 +39,21 @@ def nameprep(label): > + > + # Check bidi > + RandAL = [stringprep.in_table_d1(x) for x in label] > +- for c in RandAL: > +- if c: > +- # There is a RandAL char in the string. Must perform further > +- # tests: > +- # 1) The characters in section 5.8 MUST be prohibited. > +- # This is table C.8, which was already checked > +- # 2) If a string contains any RandALCat character, the string > +- # MUST NOT contain any LCat character. > +- if any(stringprep.in_table_d2(x) for x in label): > +- raise UnicodeError("Violation of BIDI requirement 2") > +- > +- # 3) If a string contains any RandALCat character, a > +- # RandALCat character MUST be the first character of the > +- # string, and a RandALCat character MUST be the last > +- # character of the string. > +- if not RandAL[0] or not RandAL[-1]: > +- raise UnicodeError("Violation of BIDI requirement 3") > ++ if any(RandAL): > ++ # There is a RandAL char in the string. Must perform further > ++ # tests: > ++ # 1) The characters in section 5.8 MUST be prohibited. > ++ # This is table C.8, which was already checked > ++ # 2) If a string contains any RandALCat character, the string > ++ # MUST NOT contain any LCat character. > ++ if any(stringprep.in_table_d2(x) for x in label): > ++ raise UnicodeError("Violation of BIDI requirement 2") > ++ # 3) If a string contains any RandALCat character, a > ++ # RandALCat character MUST be the first character of the > ++ # string, and a RandALCat character MUST be the last > ++ # character of the string. > ++ if not RandAL[0] or not RandAL[-1]: > ++ raise UnicodeError("Violation of BIDI requirement 3") > + > + return label > + > +diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py > +index d1faf0126c1e..37ade7d80d02 100644 > +--- a/Lib/test/test_codecs.py > ++++ b/Lib/test/test_codecs.py > +@@ -1532,6 +1532,12 @@ def test_builtin_encode(self): > + self.assertEqual("pyth\xf6n.org".encode("idna"), > b"xn--pythn-mua.org") > + self.assertEqual("pyth\xf6n.org.".encode("idna"), > b"xn--pythn-mua.org.") > + > ++ def test_builtin_decode_length_limit(self): > ++ with self.assertRaisesRegex(UnicodeError, "too long"): > ++ (b"xn--016c"+b"a"*1100).decode("idna") > ++ with self.assertRaisesRegex(UnicodeError, "too long"): > ++ (b"xn--016c"+b"a"*70).decode("idna") > ++ > + def test_stream(self): > + r = codecs.getreader("idna")(io.BytesIO(b"abc")) > + r.read(3) > +diff --git > a/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst > b/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst > +new file mode 100644 > +index 000000000000..5185fac2e29d > +--- /dev/null > ++++ b/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst > +@@ -0,0 +1,6 @@ > ++The IDNA codec decoder used on DNS hostnames by :mod:`socket` or > :mod:`asyncio` > ++related name resolution functions no longer involves a quadratic algorithm. > ++This prevents a potential CPU denial of service if an out-of-spec excessive > ++length hostname involving bidirectional characters were decoded. Some > protocols > ++such as :mod:`urllib` http ``3xx`` redirects potentially allow for an > attacker > ++to supply such a name. > diff --git a/meta/recipes-devtools/python/python3_3.8.14.bb > b/meta/recipes-devtools/python/python3_3.8.14.bb > index 035eda9ecd..cbf57684ca 100644 > --- a/meta/recipes-devtools/python/python3_3.8.14.bb > +++ b/meta/recipes-devtools/python/python3_3.8.14.bb > @@ -34,6 +34,7 @@ SRC_URI = > "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \ > file://0001-python3-Do-not-hardcode-lib-for-distutils.patch \ > > file://0020-configure.ac-setup.py-do-not-add-a-curses-include-pa.patch \ > file://makerace.patch \ > + file://CVE-2022-45061.patch \ > " > > SRC_URI_append_class-native = " \ > -- > 2.17.1 > > > > -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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