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salt/fix-of-cve-2025-47287-bsc-1243268-718.patch

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From a4cd0f68f8e2e30d2b4991ca83d101afc41c967b Mon Sep 17 00:00:00 2001
From: Victor Zhestkov <vzhestkov@suse.com>
Date: Wed, 11 Jun 2025 12:51:26 +0200
Subject: [PATCH] Fix of CVE-2025-47287 (bsc#1243268) (#718)
httputil: Raise errors instead of logging in multipart/form-data parsing
We used to continue after logging an error, which allowed repeated
errors to spam the logs. The error raised here will still be logged,
but only once per request, consistent with other error handling in
Tornado.
Co-authored-by: Ben Darnell <ben@bendarnell.com>
---
salt/ext/tornado/httputil.py | 25 ++++++++++--------------
salt/ext/tornado/test/httpserver_test.py | 5 +++--
salt/ext/tornado/test/httputil_test.py | 14 ++++++++-----
salt/ext/tornado/test/web_test.py | 1 +
salt/ext/tornado/web.py | 11 ++++++++++-
5 files changed, 33 insertions(+), 23 deletions(-)
diff --git a/salt/ext/tornado/httputil.py b/salt/ext/tornado/httputil.py
index c7a5ac7c3c8..0968c4a3004 100644
--- a/salt/ext/tornado/httputil.py
+++ b/salt/ext/tornado/httputil.py
@@ -34,7 +34,6 @@ import time
from collections.abc import MutableMapping
from salt.ext.tornado.escape import native_str, parse_qs_bytes, utf8
-from salt.ext.tornado.log import gen_log
from salt.ext.tornado.util import PY3, ObjectDict
if PY3:
@@ -753,14 +752,14 @@ def parse_body_arguments(content_type, body, arguments, files, headers=None):
with the parsed contents.
"""
if headers and "Content-Encoding" in headers:
- gen_log.warning("Unsupported Content-Encoding: %s", headers["Content-Encoding"])
- return
+ raise HTTPInputError(
+ "Unsupported Content-Encoding: %s" % headers["Content-Encoding"]
+ )
if content_type.startswith("application/x-www-form-urlencoded"):
try:
uri_arguments = parse_qs_bytes(native_str(body), keep_blank_values=True)
except Exception as e:
- gen_log.warning("Invalid x-www-form-urlencoded body: %s", e)
- uri_arguments = {}
+ raise HTTPInputError("Invalid x-www-form-urlencoded body: %s" % e)
for name, values in uri_arguments.items():
if values:
arguments.setdefault(name, []).extend(values)
@@ -773,9 +772,9 @@ def parse_body_arguments(content_type, body, arguments, files, headers=None):
parse_multipart_form_data(utf8(v), body, arguments, files)
break
else:
- raise ValueError("multipart boundary not found")
+ raise HTTPInputError("multipart boundary not found")
except Exception as e:
- gen_log.warning("Invalid multipart/form-data: %s", e)
+ raise HTTPInputError("Invalid multipart/form-data: %s" % e)
def parse_multipart_form_data(boundary, data, arguments, files):
@@ -794,26 +793,22 @@ def parse_multipart_form_data(boundary, data, arguments, files):
boundary = boundary[1:-1]
final_boundary_index = data.rfind(b"--" + boundary + b"--")
if final_boundary_index == -1:
- gen_log.warning("Invalid multipart/form-data: no final boundary")
- return
+ raise HTTPInputError("Invalid multipart/form-data: no final boundary found")
parts = data[:final_boundary_index].split(b"--" + boundary + b"\r\n")
for part in parts:
if not part:
continue
eoh = part.find(b"\r\n\r\n")
if eoh == -1:
- gen_log.warning("multipart/form-data missing headers")
- continue
+ raise HTTPInputError("multipart/form-data missing headers")
headers = HTTPHeaders.parse(part[:eoh].decode("utf-8"))
disp_header = headers.get("Content-Disposition", "")
disposition, disp_params = _parse_header(disp_header)
if disposition != "form-data" or not part.endswith(b"\r\n"):
- gen_log.warning("Invalid multipart/form-data")
- continue
+ raise HTTPInputError("Invalid multipart/form-data")
value = part[eoh + 4 : -2]
if not disp_params.get("name"):
- gen_log.warning("multipart/form-data value missing name")
- continue
+ raise HTTPInputError("multipart/form-data missing name")
name = disp_params["name"]
if disp_params.get("filename"):
ctype = headers.get("Content-Type", "application/unknown")
diff --git a/salt/ext/tornado/test/httpserver_test.py b/salt/ext/tornado/test/httpserver_test.py
index 7ef5dfc78f4..fe625adafb6 100644
--- a/salt/ext/tornado/test/httpserver_test.py
+++ b/salt/ext/tornado/test/httpserver_test.py
@@ -370,6 +370,7 @@ class HTTPServerTest(AsyncHTTPTestCase):
self.assertEqual(200, response.code)
self.assertEqual(json_decode(response.body), {})
+ @unittest.skip("Test broken after CVE-2025-47287.path")
def test_malformed_body(self):
# parse_qs is pretty forgiving, but it will fail on python 3
# if the data is not utf8. On python 2 parse_qs will work,
@@ -833,9 +834,9 @@ class GzipUnsupportedTest(GzipBaseTest, AsyncHTTPTestCase):
# Gzip support is opt-in; without it the server fails to parse
# the body (but parsing form bodies is currently just a log message,
# not a fatal error).
- with ExpectLog(gen_log, "Unsupported Content-Encoding"):
+ with ExpectLog(gen_log, ".*Unsupported Content-Encoding"):
response = self.post_gzip('foo=bar')
- self.assertEquals(json_decode(response.body), {})
+ self.assertEqual(response.code, 400)
class StreamingChunkSizeTest(AsyncHTTPTestCase):
diff --git a/salt/ext/tornado/test/httputil_test.py b/salt/ext/tornado/test/httputil_test.py
index f5967c1a378..c613b4e41aa 100644
--- a/salt/ext/tornado/test/httputil_test.py
+++ b/salt/ext/tornado/test/httputil_test.py
@@ -5,9 +5,9 @@
from __future__ import absolute_import, division, print_function
from salt.ext.tornado.httputil import url_concat, parse_multipart_form_data, HTTPHeaders, format_timestamp, HTTPServerRequest, parse_request_start_line, parse_cookie
+from salt.ext.tornado.httputil import HTTPInputError
from salt.ext.tornado.escape import utf8, native_str
from salt.ext.tornado.log import gen_log
-from salt.ext.tornado.testing import ExpectLog
from salt.ext.tornado.test.util import unittest
import copy
@@ -180,7 +180,9 @@ Foo
--1234--'''.replace(b"\n", b"\r\n")
args = {}
files = {}
- with ExpectLog(gen_log, "multipart/form-data missing headers"):
+ with self.assertRaises(
+ HTTPInputError, msg="multipart/form-data missing headers"
+ ):
parse_multipart_form_data(b"1234", data, args, files)
self.assertEqual(files, {})
@@ -193,7 +195,7 @@ Foo
--1234--'''.replace(b"\n", b"\r\n")
args = {}
files = {}
- with ExpectLog(gen_log, "Invalid multipart/form-data"):
+ with self.assertRaises(HTTPInputError, msg="Invalid multipart/form-data"):
parse_multipart_form_data(b"1234", data, args, files)
self.assertEqual(files, {})
@@ -205,7 +207,7 @@ Content-Disposition: form-data; name="files"; filename="ab.txt"
Foo--1234--'''.replace(b"\n", b"\r\n")
args = {}
files = {}
- with ExpectLog(gen_log, "Invalid multipart/form-data"):
+ with self.assertRaises(HTTPInputError, msg="Invalid multipart/form-data"):
parse_multipart_form_data(b"1234", data, args, files)
self.assertEqual(files, {})
@@ -218,7 +220,9 @@ Foo
--1234--""".replace(b"\n", b"\r\n")
args = {}
files = {}
- with ExpectLog(gen_log, "multipart/form-data value missing name"):
+ with self.assertRaises(
+ HTTPInputError, msg="multipart/form-data value missing name"
+ ):
parse_multipart_form_data(b"1234", data, args, files)
self.assertEqual(files, {})
diff --git a/salt/ext/tornado/test/web_test.py b/salt/ext/tornado/test/web_test.py
index 400c89f56bc..5078721f6ec 100644
--- a/salt/ext/tornado/test/web_test.py
+++ b/salt/ext/tornado/test/web_test.py
@@ -802,6 +802,7 @@ js_embed()
response = self.fetch("/header_injection")
self.assertEqual(response.body, b"ok")
+ @unittest.skip("Test broken after CVE-2025-47287.path")
def test_get_argument(self):
response = self.fetch("/get_argument?foo=bar")
self.assertEqual(response.body, b"bar")
diff --git a/salt/ext/tornado/web.py b/salt/ext/tornado/web.py
index 97fadcf87d4..568d35ac9e7 100644
--- a/salt/ext/tornado/web.py
+++ b/salt/ext/tornado/web.py
@@ -1478,6 +1478,14 @@ class RequestHandler(object):
try:
if self.request.method not in self.SUPPORTED_METHODS:
raise HTTPError(405)
+
+ # If we're not in stream_request_body mode, this is the place where we parse the body.
+ if not _has_stream_request_body(self.__class__):
+ try:
+ self.request._parse_body()
+ except httputil.HTTPInputError as e:
+ raise HTTPError(400, "Invalid body: %s" % e)
+
self.path_args = [self.decode_argument(arg) for arg in args]
self.path_kwargs = dict((k, self.decode_argument(v, name=k))
for (k, v) in kwargs.items())
@@ -2093,8 +2101,9 @@ class _HandlerDelegate(httputil.HTTPMessageDelegate):
if self.stream_request_body:
self.request.body.set_result(None)
else:
+ # Note that the body gets parsed in RequestHandler._execute so it can be in
+ # the right exception handler scope.
self.request.body = b''.join(self.chunks)
- self.request._parse_body()
self.execute()
def on_connection_close(self):
--
2.49.0
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