Fix the "urllib FTP protocol stream injection" vulnerability (rhbz#1478916)

This commit is contained in:
Iryna Shcherbina 2017-08-07 18:26:47 +02:00
parent 7ce2b35305
commit 2c3b2229eb
2 changed files with 71 additions and 1 deletions

View File

@ -0,0 +1,58 @@
From 8c2d4cf092c5f0335e7982392a33927579c4d512 Mon Sep 17 00:00:00 2001
From: Dong-hee Na <donghee.na92@gmail.com>
Date: Wed, 26 Jul 2017 21:11:25 +0900
Subject: [PATCH] [3.6] bpo-30119: fix ftplib.FTP.putline() to throw an error
for a illegal command (#1214) (#2886)
---
Lib/ftplib.py | 2 ++
Lib/test/test_ftplib.py | 6 +++++-
Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst | 2 ++
3 files changed, 9 insertions(+), 1 deletion(-)
create mode 100644 Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index 8f36f537e8a..a02e595cb02 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -186,6 +186,8 @@ def sanitize(self, s):
# Internal: send one line to the server, appending CRLF
def putline(self, line):
+ if '\r' in line or '\n' in line:
+ raise ValueError('an illegal newline character should not be contained')
line = line + CRLF
if self.debugging > 1:
print('*put*', self.sanitize(line))
diff --git a/Lib/test/test_ftplib.py b/Lib/test/test_ftplib.py
index 12fabc5e8be..a561e9efa03 100644
--- a/Lib/test/test_ftplib.py
+++ b/Lib/test/test_ftplib.py
@@ -484,6 +484,9 @@ def test_sanitize(self):
self.assertEqual(self.client.sanitize('PASS 12345'), repr('PASS *****'))
def test_exceptions(self):
+ self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\r\n0')
+ self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\n0')
+ self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\r0')
self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 400')
self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 499')
self.assertRaises(ftplib.error_perm, self.client.sendcmd, 'echo 500')
@@ -492,7 +495,8 @@ def test_exceptions(self):
def test_all_errors(self):
exceptions = (ftplib.error_reply, ftplib.error_temp, ftplib.error_perm,
- ftplib.error_proto, ftplib.Error, OSError, EOFError)
+ ftplib.error_proto, ftplib.Error, OSError,
+ EOFError)
for x in exceptions:
try:
raise x('exception not included in all_errors set')
diff --git a/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst b/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst
new file mode 100644
index 00000000000..a37d3703842
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst
@@ -0,0 +1,2 @@
+ftplib.FTP.putline() now throws ValueError on commands that contains CR or
+LF. Patch by Dong-hee Na.

View File

@ -133,7 +133,7 @@
Summary: Version 3 of the Python programming language aka Python 3000
Name: python3
Version: %{pybasever}.2
Release: 5%{?dist}
Release: 6%{?dist}
License: Python
Group: Development/Languages
@ -449,6 +449,13 @@ Patch270: 00270-fix-ssl-alpn-hook-test.patch
# Reported upstream: http://bugs.python.org/issue31034
Patch271: 00271-asyncio-get-default-signal-handler.patch
# 00272 #
# Reject newline characters in ftplib.FTP.putline() arguments to
# avoid FTP protocol stream injection via malicious URLs.
# rhbz#1478916
# Fixed upstream: http://bugs.python.org/issue30119
Patch272: 00272-fix-ftplib-to-reject-newlines.patch
# (New patches go here ^^^)
#
# When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@ -723,6 +730,7 @@ sed -r -i s/'_PIP_VERSION = "[0-9.]+"'/'_PIP_VERSION = "%{pip_version}"'/ Lib/en
%patch270 -p1
%patch271 -p1
%patch272 -p1
# Currently (2010-01-15), http://docs.python.org/library is for 2.6, and there
# are many differences between 2.6 and the Python 3 library.
@ -1688,6 +1696,10 @@ fi
# ======================================================
%changelog
* Mon Aug 07 2017 Iryna Shcherbina <ishcherb@redhat.com> - 3.6.2-6
- Fix the "urllib FTP protocol stream injection" vulnerability
Resolves: rhbz#1478916
* Tue Aug 01 2017 Tomas Orsava <torsava@redhat.com> - 3.6.2-5
- Dropped BuildRequires on db4-devel which was useful for Python 2 (module
bsddb), however, no longer needod for Python 3