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Fix CVE-2025-15282 (bsc#1257046)

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Add CVE-2025-15282-urllib-ctrl-chars.patch fixing bsc#1257046
  (CVE-2025-15282) using gh#python/cpython!143926 and doing
  basically the same as the previous patch for urllib library.
This commit is contained in:
Matej Cepl
2026-02-04 16:58:21 +01:00
parent e0030de7d3
commit e5495e2b21
3 changed files with 65 additions and 0 deletions
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59
CVE-2025-15282-urllib-ctrl-chars.patch Normal file
View File

@@ -0,0 +1,59 @@
From d8850aac54c234201966c66e83225564302cd15c Mon Sep 17 00:00:00 2001
From: Seth Michael Larson <seth@python.org>
Date: Fri, 16 Jan 2026 10:54:09 -0600
Subject: [PATCH 1/2] Add 'test.support' fixture for C0 control characters
---
Lib/test/test_urllib.py | 8 ++++++++
Lib/urllib/request.py | 5 +++++
Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst | 1 +
3 files changed, 14 insertions(+)
Index: Python-3.15.0a3/Lib/test/test_urllib.py
===================================================================
--- Python-3.15.0a3.orig/Lib/test/test_urllib.py 2026-02-04 16:57:42.070871001 +0100
+++ Python-3.15.0a3/Lib/test/test_urllib.py 2026-02-04 16:57:49.106800440 +0100
@@ -10,6 +10,7 @@
from test import support
from test.support import os_helper
from test.support import socket_helper
+from test.support import control_characters_c0
import os
import socket
try:
@@ -590,6 +591,13 @@
# missing padding character
self.assertRaises(ValueError,urllib.request.urlopen,'data:;base64,Cg=')
+ def test_invalid_mediatype(self):
+ for c0 in control_characters_c0():
+ self.assertRaises(ValueError,urllib.request.urlopen,
+ f'data:text/html;{c0},data')
+ for c0 in control_characters_c0():
+ self.assertRaises(ValueError,urllib.request.urlopen,
+ f'data:text/html{c0};base64,ZGF0YQ==')
class urlretrieve_FileTests(unittest.TestCase):
"""Test urllib.urlretrieve() on local files"""
Index: Python-3.15.0a3/Lib/urllib/request.py
===================================================================
--- Python-3.15.0a3.orig/Lib/urllib/request.py 2026-02-04 16:57:42.390604584 +0100
+++ Python-3.15.0a3/Lib/urllib/request.py 2026-02-04 16:57:49.107133794 +0100
@@ -1634,6 +1634,11 @@
scheme, data = url.split(":",1)
mediatype, data = data.split(",",1)
+ # Disallow control characters within mediatype.
+ if re.search(r"[\x00-\x1F\x7F]", mediatype):
+ raise ValueError(
+ "Control characters not allowed in data: mediatype")
+
# even base64 encoded data URLs might be quoted so unquote in any case:
data = unquote_to_bytes(data)
if mediatype.endswith(";base64"):
Index: Python-3.15.0a3/Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ Python-3.15.0a3/Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst 2026-02-04 16:57:49.107422870 +0100
@@ -0,0 +1 @@
+Reject control characters in ``data:`` URL media types.

3
python315.changes
View File

@@ -12,6 +12,9 @@ Wed Feb 4 00:53:37 UTC 2026 - Matej Cepl <mcepl@cepl.eu>
- Add CVE-2025-15366-imap-ctrl-chars.patch fixing bsc#1257044
(CVE-2025-15366) using gh#python/cpython!143922 and doing
basically the same as the previous patch for IMAP protocol.
- Add CVE-2025-15282-urllib-ctrl-chars.patch fixing bsc#1257046
(CVE-2025-15282) using gh#python/cpython!143926 and doing
basically the same as the previous patch for urllib library.
-------------------------------------------------------------------
Tue Jan 27 16:31:12 UTC 2026 - Matej Cepl <mcepl@cepl.eu>

3
python315.spec
View File

@@ -247,6 +247,9 @@ Patch48: CVE-2026-0865-wsgiref-ctrl-chars.patch
# PATCH-FIX-UPSTREAM CVE-2025-15366-imap-ctrl-chars.patch bsc#1257044 mcepl@suse.com
# Reject control characters in wsgiref.headers.Headers
Patch49: CVE-2025-15366-imap-ctrl-chars.patch
# PATCH-FIX-UPSTREAM CVE-2025-15282-urllib-ctrl-chars.patch bsc#1257046 mcepl@suse.com
# Reject control characters in wsgiref.headers.Headers
Patch50: CVE-2025-15282-urllib-ctrl-chars.patch
#### Python 3.15 DEVELOPMENT PATCHES
BuildRequires: autoconf-archive
BuildRequires: automake