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Fix #7980 (Security vulnerability in Calibre 0.7.34)

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This commit is contained in:
Kovid Goyal 2010-12-20 14:48:25 -07:00
parent 6e3d2db96c
commit cddf207277
1 changed files with 13 additions and 6 deletions
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19
src/calibre/library/server/content.py
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@ -5,7 +5,7 @@ __license__ = 'GPL v3'
__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
import re, os
import re, os, posixpath
import cherrypy
@ -88,17 +88,24 @@ class ContentServer(object):
def static(self, name):
'Serves static content'
name = name.lower()
cherrypy.response.headers['Content-Type'] = {
fname = posixpath.basename(name)
try:
cherrypy.response.headers['Content-Type'] = {
'js' : 'text/javascript',
'css' : 'text/css',
'png' : 'image/png',
'gif' : 'image/gif',
'html' : 'text/html',
'' : 'application/octet-stream',
}[name.rpartition('.')[-1].lower()]
}[fname.rpartition('.')[-1].lower()]
except KeyError:
raise cherrypy.HTTPError(404, '%r not a valid resource type'%name)
cherrypy.response.headers['Last-Modified'] = self.last_modified(self.build_time)
path = P('content_server/'+name)
if not os.path.exists(path):
basedir = os.path.abspath(P('content_server'))
path = os.path.join(basedir, name.replace('/', os.sep))
path = os.path.abspath(path)
if not path.startswith(basedir):
raise cherrypy.HTTPError(403, 'Access to %s is forbidden'%name)
if not os.path.exists(path) or not os.path.isfile(path):
raise cherrypy.HTTPError(404, '%s not found'%name)
if self.opts.develop:
lm = fromtimestamp(os.stat(path).st_mtime)