Ruby Gem Creme Fraiche 0.6 Command Injection

`TITLE: Remote command Injection in Creme Fraiche 0.6 Ruby Gem  
  
DATE: 5/14/2013  
  
AUTHOR: Larry W. Cashdollar (@_larry0)  
  
DOWNLOAD: http://rubygems.org/gems/cremefraiche, http://www.uplawski.eu/technology/cremefraiche/  
  
DESCRIPTION: Converts Email to PDF files.  
  
VENDOR: Notifed on 5/13/2013, provided fix 5/14/2013  
  
FIX: Version in 0.6.1  
  
CVE: 2013-2090  
  
DETAILS: The following lines pass unsanitized user input directly to the command line.  
A malicious email attachment with a file name consisting of shell meta characters could inject commands into the shell.  
  
If the attacker is allowed to specify a filename (via a web gui) commands could be injected that way as well.  
  
218 cmd = "pdftk %s updateinfo %s output %s" %[pdf, infofile, tfile] 219 @log.debug('pdftk-command is ' << cmd) 220 pdftkresult = system( cmd)  
  
GREETINGS: @vladz,@quine,@BrandonTansey,@sushidude,@jkouns,@sub_space and @attritionorg  
  
ADVISORY: http://vapid.dhs.org/advisories/cremefraiche-cmd-inj.html  
`