rpms/python-idna
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import CS git python-idna-3.7-6.el10_2

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AlmaLinux RelEng Bot 2026-08-13 04:34:05 -04:00
parent dd871f25d5
commit 5d5ca98e78
2 changed files with 147 additions and 2 deletions
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134
CVE-2026-45409.patch Normal file
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@ -0,0 +1,134 @@
From 487f90216c00097caa6c5f10eb1f843ec2d8a4b6 Mon Sep 17 00:00:00 2001
From: Kim Davies <kim@cynosure.com.au>
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 <metsw24@gmail.com>
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'

15
python-idna.spec
View File

@ -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 <redhat-ymir-agent@redhat.com> - 3.7-6
- Fix CVE-2026-45409: quadratic time complexity in IDNA validation
* Mon Nov 11 2024 Miro Hrončok <miro@hroncok.cz> - 3.7-5
- rpminspect: Disable the unicode inspection
* Tue Oct 29 2024 Troy Dawson <tdawson@redhat.com> - 3.7-4
- Bump release for October 2024 mass rebuild: