Home page logo
/

fulldisclosure logo Full Disclosure mailing list archives

cryptsetup can't destroy last key of a LUKS partition under Ubuntu/Debian
From: Pierre Dinh-van <pierre () qsdf org>
Date: Fri, 13 Feb 2009 09:24:52 +0100

Hello everyone,

I noticed last week that the Debian packaged version of cryptsetup has a
little limitation, which could be a security issue for people who have to
destroy their data forever. 

It is impossible to destroy a keyslot when you used it to unlock the master
key.

I reported the bug to debian (etch and lenny are affected as far as I tested):
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=513596
and to ubuntu (tested on hardy):
https://bugs.launchpad.net/cryptsetup/+bug/324871

It's not a major security problem, but people who were planning to run 
'cryptsetup luksDelKey /dev/sda1 0' on their installation when the police 
comes to wake them up should be adviced that it won't work out of the box.

Cheers,


Pierre Dinh-van

Attachment: signature.asc
Description: Digital signature

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

  By Date           By Thread  

Current thread:
  • cryptsetup can't destroy last key of a LUKS partition under Ubuntu/Debian Pierre Dinh-van (Feb 13)
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault