124 lines
4.6 KiB
Diff
124 lines
4.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: tomcruiseqi <tom33qi@gmail.com>
|
|
Date: Wed, 25 Mar 2026 02:23:45 +0800
|
|
Subject: 00478: CVE-2026-4519
|
|
|
|
Reject leading dashes in webbrowser URLs (GH-143931) (GH-146359)
|
|
|
|
Cherry-picked from Python 3.10: ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60a5
|
|
|
|
(cherry picked from commit 82a24a4442312bdcfc4c799885e8b3e00990f02b)
|
|
|
|
Co-authored-by: Seth Michael Larson <seth@python.org>
|
|
---
|
|
Lib/test/test_webbrowser.py | 5 +++++
|
|
Lib/webbrowser.py | 14 ++++++++++++++
|
|
.../2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst | 1 +
|
|
3 files changed, 20 insertions(+)
|
|
create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst
|
|
|
|
diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py
|
|
index 519a9432ab..f8e9234db8 100644
|
|
--- a/Lib/test/test_webbrowser.py
|
|
+++ b/Lib/test/test_webbrowser.py
|
|
@@ -55,6 +55,11 @@ class GenericBrowserCommandTest(CommandTestMixin, unittest.TestCase):
|
|
options=[],
|
|
arguments=[URL])
|
|
|
|
+ def test_reject_dash_prefixes(self):
|
|
+ browser = self.browser_class(name=CMD_NAME)
|
|
+ with self.assertRaises(ValueError):
|
|
+ browser.open(f"--key=val {URL}")
|
|
+
|
|
|
|
class BackgroundBrowserCommandTest(CommandTestMixin, unittest.TestCase):
|
|
|
|
diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py
|
|
index 6023c1e138..f5349dbce5 100755
|
|
--- a/Lib/webbrowser.py
|
|
+++ b/Lib/webbrowser.py
|
|
@@ -154,6 +154,12 @@ class BaseBrowser(object):
|
|
def open_new_tab(self, url):
|
|
return self.open(url, 2)
|
|
|
|
+ @staticmethod
|
|
+ def _check_url(url):
|
|
+ """Ensures that the URL is safe to pass to subprocesses as a parameter"""
|
|
+ if url and url.lstrip().startswith("-"):
|
|
+ raise ValueError(f"Invalid URL: {url}")
|
|
+
|
|
|
|
class GenericBrowser(BaseBrowser):
|
|
"""Class for all browsers started with a command
|
|
@@ -171,6 +177,7 @@ class GenericBrowser(BaseBrowser):
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
cmdline = [self.name] + [arg.replace("%s", url)
|
|
for arg in self.args]
|
|
try:
|
|
@@ -191,6 +198,7 @@ class BackgroundBrowser(GenericBrowser):
|
|
cmdline = [self.name] + [arg.replace("%s", url)
|
|
for arg in self.args]
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
try:
|
|
if sys.platform[:3] == 'win':
|
|
p = subprocess.Popen(cmdline)
|
|
@@ -256,6 +264,7 @@ class UnixBrowser(BaseBrowser):
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
if new == 0:
|
|
action = self.remote_action
|
|
elif new == 1:
|
|
@@ -357,6 +366,7 @@ class Konqueror(BaseBrowser):
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
# XXX Currently I know no way to prevent KFM from opening a new win.
|
|
if new == 2:
|
|
action = "newTab"
|
|
@@ -441,6 +451,7 @@ class Grail(BaseBrowser):
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
if new:
|
|
ok = self._remote("LOADNEW " + url)
|
|
else:
|
|
@@ -599,6 +610,7 @@ if sys.platform[:3] == "win":
|
|
class WindowsDefault(BaseBrowser):
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
try:
|
|
os.startfile(url)
|
|
except OSError:
|
|
@@ -629,6 +641,7 @@ if sys.platform == 'darwin':
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
sys.audit("webbrowser.open", url)
|
|
+ self._check_url(url)
|
|
assert "'" not in url
|
|
# hack for local urls
|
|
if not ':' in url:
|
|
@@ -666,6 +679,7 @@ if sys.platform == 'darwin':
|
|
self._name = name
|
|
|
|
def open(self, url, new=0, autoraise=True):
|
|
+ self._check_url(url)
|
|
if self._name == 'default':
|
|
script = 'open location "%s"' % url.replace('"', '%22') # opens in default browser
|
|
else:
|
|
diff --git a/Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst b/Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst
|
|
new file mode 100644
|
|
index 0000000000..0f27eae99a
|
|
--- /dev/null
|
|
+++ b/Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst
|
|
@@ -0,0 +1 @@
|
|
+Reject leading dashes in URLs passed to :func:`webbrowser.open`
|