Author: adrian
Date: 2006-08-16 01:28:13 -0500 (Wed, 16 Aug 2006)
New Revision: 3592

Modified:
   django/trunk/django/bin/compile-messages.py
Log:
Fixed small security hole in bin/compile-messages.py by escaping the .po 
filename in os.system() call. Announcement forthcoming

Modified: django/trunk/django/bin/compile-messages.py
===================================================================
--- django/trunk/django/bin/compile-messages.py 2006-08-16 05:43:27 UTC (rev 
3591)
+++ django/trunk/django/bin/compile-messages.py 2006-08-16 06:28:13 UTC (rev 
3592)
@@ -19,7 +19,14 @@
             if f.endswith('.po'):
                 sys.stderr.write('processing file %s in %s\n' % (f, dirpath))
                 pf = os.path.splitext(os.path.join(dirpath, f))[0]
-                cmd = 'msgfmt -o "%s.mo" "%s.po"' % (pf, pf)
+                # Store the names of the .mo and .po files in an environment
+                # variable, rather than doing a string replacement into the
+                # command, so that we can take advantage of shell quoting, to
+                # quote any malicious characters/escaping.
+                # See http://cyberelk.net/tim/articles/cmdline/ar01s02.html
+                os.environ['djangocompilemo'] = pf + '.mo'
+                os.environ['djangocompilepo'] = pf + '.po'
+                cmd = 'msgfmt -o "$djangocompilemo" "$djangocompilepo"'
                 os.system(cmd)
 
 if __name__ == "__main__":


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