From 5d5ca98e788dded02be65b7e6b6ffea0720e0014 Mon Sep 17 00:00:00 2001 From: AlmaLinux RelEng Bot Date: Thu, 13 Aug 2026 04:34:05 -0400 Subject: [PATCH] import CS git python-idna-3.7-6.el10_2 --- CVE-2026-45409.patch | 134 +++++++++++++++++++++++++++++++++++++++++++ python-idna.spec | 15 ++++- 2 files changed, 147 insertions(+), 2 deletions(-) create mode 100644 CVE-2026-45409.patch diff --git a/CVE-2026-45409.patch b/CVE-2026-45409.patch new file mode 100644 index 0000000..ca9bd1c --- /dev/null +++ b/CVE-2026-45409.patch @@ -0,0 +1,134 @@ +From 487f90216c00097caa6c5f10eb1f843ec2d8a4b6 Mon Sep 17 00:00:00 2001 +From: Kim Davies +Date: Sun, 10 May 2026 08:47:22 -0700 +Subject: [PATCH 1/2] Merge commit from fork + +--- + idna/core.py | 14 ++++++++++++++ + tests/test_idna.py | 13 +++++++++++++ + 2 files changed, 27 insertions(+) + +diff --git a/idna/core.py b/idna/core.py +index 0dae61a..a549326 100644 +--- a/idna/core.py ++++ b/idna/core.py +@@ -340,6 +340,15 @@ def encode(s: Union[str, bytes, bytearray], strict: bool = False, uts46: bool = + raise IDNAError('should pass a unicode string to the function rather than a byte string.') + if uts46: + s = uts46_remap(s, std3_rules, transitional) ++ ++ # Reject inputs that exceed the maximum DNS domain length up-front. ++ # Each codepoint in a U-label contributes at least one octet to its ++ # A-label form, so any input longer than the domain limit cannot ++ # produce a valid A-domain. Short-circuiting here prevents per-label ++ # validation from being driven into quadratic time ++ if len(s) > 254: ++ raise IDNAError("Domain too long") ++ + trailing_dot = False + result = [] + if strict: +@@ -373,6 +382,11 @@ def decode(s: Union[str, bytes, bytearray], strict: bool = False, uts46: bool = + raise IDNAError('Invalid ASCII in A-label') + if uts46: + s = uts46_remap(s, std3_rules, False) ++ # See encode() for rationale; the same bound applies because every ++ # legal A-domain is at most 254 octets and every codepoint of a ++ # legal U-domain contributes at least one octet to its A-form. ++ if len(s) > 254: ++ raise IDNAError("Domain too long") + trailing_dot = False + result = [] + if not strict: +diff --git a/tests/test_idna.py b/tests/test_idna.py +index 81afb32..5001b48 100755 +--- a/tests/test_idna.py ++++ b/tests/test_idna.py +@@ -78,6 +78,19 @@ class IDNATests(unittest.TestCase): + self.assertFalse(idna.valid_label_length('a' * 64)) + self.assertRaises(idna.IDNAError, idna.encode, 'a' * 64) + ++ def test_oversized_input_rejected_promptly(self): ++ # GHSA-65pc-fj4g-8rjx: encode/decode must reject inputs that ++ # exceed the maximum DNS domain length before per-codepoint ++ # validation runs, so labels dominated by CONTEXTO codepoints ++ # cannot drive validation into quadratic time. ++ import time ++ ++ for payload in ("٠" * 8000, "・" * 8000 + "漢"): ++ start = time.perf_counter() ++ self.assertRaises(idna.IDNAError, idna.encode, payload) ++ self.assertRaises(idna.IDNAError, idna.decode, payload) ++ self.assertLess(time.perf_counter() - start, 1.0) ++ + def test_check_bidi(self): + + l = '\u0061' + +From 219662569606146771ac69fac5939d3308159064 Mon Sep 17 00:00:00 2001 +From: metsw24-max +Date: Mon, 11 May 2026 20:59:30 +0530 +Subject: [PATCH 2/2] Enforce early length limits in check_label + +--- + idna/core.py | 11 +++++++++++ + tests/test_idna.py | 24 ++++++++++++++++++++++++ + 2 files changed, 35 insertions(+) + +diff --git a/idna/core.py b/idna/core.py +index a549326..f863141 100644 +--- a/idna/core.py ++++ b/idna/core.py +@@ -230,6 +230,17 @@ def check_label(label: Union[str, bytes, bytearray]) -> None: + label = label.decode('utf-8') + if len(label) == 0: + raise IDNAError('Empty Label') ++ # Reject oversized labels before per-codepoint validation runs. ++ # CONTEXTJ/CONTEXTO checks scan the whole label per codepoint, so an ++ # uncapped label drives validation into quadratic time ++ # (GHSA-65pc-fj4g-8rjx / CVE-2024-3651). encode()/decode() cap the ++ # whole-domain length; this cap protects direct callers of ++ # alabel/ulabel/check_label and the idna2008 incremental codec. ++ # Use the whole-domain bound rather than the per-label DNS bound so ++ # that UTS #46 lenient decoding of labels longer than 63 chars is ++ # preserved. ++ if not valid_string_length(label, trailing_dot=True): ++ raise IDNAError('Label too long') + + check_nfc(label) + check_hyphen_ok(label) +diff --git a/tests/test_idna.py b/tests/test_idna.py +index 5001b48..2dc0892 100755 +--- a/tests/test_idna.py ++++ b/tests/test_idna.py +@@ -91,6 +91,30 @@ class IDNATests(unittest.TestCase): + self.assertRaises(idna.IDNAError, idna.decode, payload) + self.assertLess(time.perf_counter() - start, 1.0) + ++ def test_oversized_label_rejected_promptly(self): ++ # The whole-domain cap in encode()/decode() does not cover direct ++ # callers of alabel/ulabel/check_label, nor the idna2008 ++ # incremental codec which calls alabel/ulabel per label. Without a ++ # per-label cap, a single oversized CONTEXTO-heavy label still ++ # drives validation into quadratic time. ++ import codecs ++ import time ++ ++ import idna.codec # noqa: F401 (register the idna2008 codec) ++ ++ payload = "・" * 8000 + "漢" ++ start = time.perf_counter() ++ self.assertRaises(idna.IDNAError, idna.check_label, payload) ++ self.assertRaises(idna.IDNAError, idna.alabel, payload) ++ self.assertRaises(idna.IDNAError, idna.ulabel, payload) ++ self.assertRaises( ++ idna.IDNAError, ++ codecs.getincrementalencoder("idna2008")().encode, ++ payload, ++ True, ++ ) ++ self.assertLess(time.perf_counter() - start, 1.0) ++ + def test_check_bidi(self): + + l = '\u0061' diff --git a/python-idna.spec b/python-idna.spec index 66b3db6..14b6bd8 100644 --- a/python-idna.spec +++ b/python-idna.spec @@ -1,8 +1,8 @@ ## START: Set by rpmautospec -## (rpmautospec version 0.6.5) +## (rpmautospec version 0.8.1) ## RPMAUTOSPEC: autorelease, autochangelog %define autorelease(e:s:pb:n) %{?-p:0.}%{lua: - release_number = 4; + release_number = 6; base_release_number = tonumber(rpm.expand("%{?-b*}%{!?-b:1}")); print(release_number + base_release_number - 1); }%{?-e:.%{-e*}}%{?-s:.%{-s*}}%{!?-n:%{?dist}} @@ -18,6 +18,11 @@ Summary: Internationalized Domain Names in Applications (IDNA) License: BSD-3-Clause URL: https://github.com/kjd/idna Source0: https://pypi.io/packages/source/i/%{srcname}/%{srcname}-%{version}.tar.gz + +# https://github.com/kjd/idna/commit/c0dda4501df5d91c3181ce6f962dc5de74e82cc1 +# https://github.com/kjd/idna/commit/e1cb465b6376f33306a26f467d197edbcd01c4b9 +Patch: CVE-2026-45409.patch + BuildArch: noarch BuildRequires: python3-devel @@ -71,6 +76,12 @@ rm -rf %{srcname}.egg-info %changelog ## START: Generated by rpmautospec +* Mon Aug 10 2026 RHEL Packaging Agent - 3.7-6 +- Fix CVE-2026-45409: quadratic time complexity in IDNA validation + +* Mon Nov 11 2024 Miro Hrončok - 3.7-5 +- rpminspect: Disable the unicode inspection + * Tue Oct 29 2024 Troy Dawson - 3.7-4 - Bump release for October 2024 mass rebuild: