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-rw-r--r--Lib/http/server.py2
-rw-r--r--Lib/test/test_httpservers.py5
-rw-r--r--Misc/NEWS3
3 files changed, 9 insertions, 1 deletions
diff --git a/Lib/http/server.py b/Lib/http/server.py
index 6ce6bda..c98df19 100644
--- a/Lib/http/server.py
+++ b/Lib/http/server.py
@@ -977,7 +977,7 @@ class CGIHTTPRequestHandler(SimpleHTTPRequestHandler):
(and the next character is a '/' or the end of the string).
"""
- collapsed_path = _url_collapse_path(self.path)
+ collapsed_path = _url_collapse_path(urllib.parse.unquote(self.path))
dir_sep = collapsed_path.find('/', 1)
head, tail = collapsed_path[:dir_sep], collapsed_path[dir_sep+1:]
if head in self.cgi_directories:
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 15694af..f30ad67 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -485,6 +485,11 @@ class CGIHTTPServerTestCase(BaseTestCase):
(res.read(), res.getheader('Content-type'), res.status))
self.assertEqual(os.environ['SERVER_SOFTWARE'], signature)
+ def test_urlquote_decoding_in_cgi_check(self):
+ res = self.request('/cgi-bin%2ffile1.py')
+ self.assertEqual((b'Hello World\n', 'text/html', 200),
+ (res.read(), res.getheader('Content-type'), res.status))
+
class SocketlessRequestHandler(SimpleHTTPRequestHandler):
def __init__(self):
diff --git a/Misc/NEWS b/Misc/NEWS
index 2f4b0ed..66d9132 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -26,6 +26,9 @@ Library
run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now
raise an exception if the event loop was closed.
+- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths
+ before checking for a CGI script at that path.
+
- Issue #21310: Fixed possible resource leak in failed open().
- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods.