Bugtraq mailing list archives
Re: [Full-disclosure] Samba Remote Zero-Day Exploit
From: Krzysztof Halasa <khc () pm waw pl>
Date: Mon, 08 Feb 2010 22:57:15 +0100
Thierry Zoller <Thierry () zoller lu> writes:
Facts : - Several distributions run with vulnerable settings per default if there is a "misconfiguration" it is part of the vendor. - Your not supposed to be able to traverse dirs.
What's wrong with creating $HOME/tmp -> /tmp/$USER (not necessarily with Samba, maybe with xterm or ssh) and then accessing /tmp/$USER via /host/HOME/tmp? Why is it a problem while "ssh host cat /etc/passwd" is not? Can you traverse a directory for which you have no +x right? Can you, for example, write to a file for which you have no +w right? Read without +r? If you can't, maybe it's a (local config?) issue with guest accounts, or maybe Windows-only (and similar, non-guest) accounts, instead of permissions and symlinks? Disabling or limiting symlink creation will not really close the "hole", the problem is not the symlink but that the user has fs access which he (or she) should never have. ... unless (obviously) answer to any of the 3 questions is positive (I haven't checked, to be honest) - is it? -- Chris
Current thread:
- Re: Samba Remote Zero-Day Exploit, (continued)
- Re: Samba Remote Zero-Day Exploit paul . szabo (Feb 08)
- Message not available
- Re: Samba Remote Zero-Day Exploit Stefan Kanthak (Feb 08)
- RE: Samba Remote Zero-Day Exploit Michael Wojcik (Feb 08)
- Re: Samba Remote Zero-Day Exploit Stefan Kanthak (Feb 09)
- RE: Samba Remote Zero-Day Exploit Michael Wojcik (Feb 09)
- Message not available
- Re: Samba Remote Zero-Day Exploit Dan Kaminsky (Feb 08)
- Re: Samba Remote Zero-Day Exploit Stefan Kanthak (Feb 08)
- Re: Samba Remote Zero-Day Exploit Dan Kaminsky (Feb 08)
- Re: Samba Remote Zero-Day Exploit paul . szabo (Feb 08)
- Re: [Full-disclosure] Samba Remote Zero-Day Exploit paul . szabo (Feb 08)
- Re: [Full-disclosure] Samba Remote Zero-Day Exploit Krzysztof Halasa (Feb 09)