python3-setuptools: fix CVE-2025-47273

setuptools is a package that allows users to download, build, install,
upgrade, and uninstall Python packages. A path traversal vulnerability
in `PackageIndex` is present in setuptools prior to version 78.1.1. An
attacker would be allowed to write files to arbitrary locations on the
filesystem with the permissions of the process running the Python code,
which could escalate to remote code execution depending on the context.
Version 78.1.1 fixes the issue.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-47273

Upstream-patch:
d8390feaa9
250a6d1797

(From OE-Core rev: cfb2d77f841ae21cae0ba7d6263dc3e1e0280400)

Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-devtools/python/python3-setuptools/CVE-2025-47273.patch

@@ -0,0 +1,60 @@
+From 250a6d17978f9f6ac3ac887091f2d32886fbbb0b Mon Sep 17 00:00:00 2001
+From: "Jason R. Coombs" <jaraco@jaraco.com>
+Date: Sat, 19 Apr 2025 13:03:47 -0400
+Subject: [PATCH] Add a check to ensure the name resolves relative to the
+ tmpdir.
+
+Closes #4946
+
+CVE: CVE-2025-47273
+
+Upstream-Status: Backport [https://github.com/pypa/setuptools/commit/250a6d17978f9f6ac3ac887091f2d32886fbbb0b]
+
+Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
+---
+ setuptools/package_index.py | 18 ++++++++++++++++--
+ 1 file changed, 16 insertions(+), 2 deletions(-)
+
+diff --git a/setuptools/package_index.py b/setuptools/package_index.py
+index b317735..a8f868e 100644
+--- a/setuptools/package_index.py
++++ b/setuptools/package_index.py
+@@ -810,12 +810,20 @@ class PackageIndex(Environment):
+     @staticmethod
+     def _resolve_download_filename(url, tmpdir):
+         """
++        >>> import pathlib
+         >>> du = PackageIndex._resolve_download_filename
+         >>> root = getfixture('tmp_path')
+         >>> url = 'https://files.pythonhosted.org/packages/a9/5a/0db.../setuptools-78.1.0.tar.gz'
+-        >>> import pathlib
+         >>> str(pathlib.Path(du(url, root)).relative_to(root))
+         'setuptools-78.1.0.tar.gz'
++
++        Ensures the target is always in tmpdir.
++
++        >>> url = 'https://anyhost/%2fhome%2fuser%2f.ssh%2fauthorized_keys'
++        >>> du(url, root)
++        Traceback (most recent call last):
++        ...
++        ValueError: Invalid filename...
+         """
+         name, _fragment = egg_info_for_url(url)
+         if name:
+@@ -827,7 +835,13 @@ class PackageIndex(Environment):
+         if name.endswith('.egg.zip'):
+             name = name[:-4]  # strip the extra .zip before download
+
+-        return os.path.join(tmpdir, name)
++        filename = os.path.join(tmpdir, name)
++
++        # ensure path resolves within the tmpdir
++        if not filename.startswith(str(tmpdir)):
++            raise ValueError(f"Invalid filename {filename}")
++
++        return filename
+
+     def _download_url(self, url, tmpdir):
+         """
+--
+2.40.0