full-disclosure - A new TCP/IP blind data injection technique?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20031213221140.X6830@dekadens.coredump.cx>
From: lcamtuf at ghettot.org (Michal Zalewski)
Subject: A new TCP/IP blind data injection technique?

On Sat, 13 Dec 2003, Michael Gale wrote:

> From your e-mail it looks like you need to send a fragmented packet in
> order to exploit this vulnerability. Most firewalls will NOT accept
> fragmented packets.

Neither is true.

Most firewalls accept fragmented packets (but do reassembly). You need to
send a fragment (not an entire packet), and to exploit the vulnerability,
it is perfectly fine for the packet to be reassembled by the recipient's
firewall - it does not have to go through as-is.

-- 
------------------------- bash$ :(){ :|:&};: --
 Michal Zalewski * [http://lcamtuf.coredump.cx]
    Did you know that clones never use mirrors?
--------------------------- 2003-12-13 22:11 --

   http://lcamtuf.coredump.cx/photo/current/