[NT] Chatman Remote DoS (New User Broadcast)

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]

To: list@securiteam.com
Date: 1 Oct 2004 09:59:57 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html

- - - - - - - - -

  Chatman Remote DoS (New User Broadcast)
------------------------------------------------------------------------

SUMMARY

" <http://www.vp-soft.com/software/chatman.php> ChatMan provides an
universal solution for communicating within local area network
(intranet)."
A remote attacker can crash ChatMan by sending a packet containing a large
packet size.

DETAILS

Vulnerable Systems:
 * ChatMan version 1.5.1 RC1 and below.

Each data block exchanged by Chatman is constituted by a 32 bits number
used to identify the data size. The amount of memory specified by this
number is immediately allocated but if it is too big (and so allocation
fails) the program terminates automatically.
Also if the program uses the TCP protocol is possible to crash any Chatman
host in the LAN simply sending a "new user" broadcast packet, they will
automatically connect to the attacker that can passively exploit the bug
as described previously.

Proof of Concept Code:
Proof of Concept code is available at:
<http://aluigi.altervista.org/poc/chatmanx.zip>
http://aluigi.altervista.org/poc/chatmanx.zip

Vendor Status:
No fix is available. Chatman is no longer supported.

ADDITIONAL INFORMATION

The information has been provided by <mailto:aluigi@autistici.org> Luigi
Auriemma.

========================================

This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

====================
====================

DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]

Relevant Pages

• [NT] Timbuktu Pro Path Traversal and Log Injection
  ... The following security advisory is sent to the securiteam mailing list, and can be
  found at the SecuriTeam web site: http://www.securiteam.com ... Several fields of the packet
  ... The other bug is a logging file content manipulation vulnerability ... chunk
  should be set ... (Securiteam)
• [UNIX] PPPd DoS
  ... The following security advisory is sent to the securiteam mailing list, and can be
  found at the SecuriTeam web site: http://www.securiteam.com ... Point-to-Point Protocol
  for Unix systems". ... It reads in the packet at line 932, ... The loop continues
  processing the packet as long as len is!= 0. ... (Securiteam)
• [NT] Technical Description of the SSL PCT Vulnerability
  ... The following security advisory is sent to the securiteam mailing list, and can be
  found at the SecuriTeam web site: http://www.securiteam.com ... thorough and detailed analysis
  of the vulnerability in MS's SSL library is ... the variable N is taken from the packet
  itself. ... In this context a "valid field value" is one that allows the execution ...
  (Securiteam)
• [EXPL] autoRST - Automated TCP RST Exploit
  ... The following security advisory is sent to the securiteam mailing list, and can be
  found at the SecuriTeam web site: http://www.securiteam.com ... sniff for TCP packets on
  a network and then sends out a forged RST packet ... * winpcap header files downloaded
  and paths setup. ... typedef struct mac_address { ... (Securiteam)
• [EXPL] Counter Strike 2D DoS (Exploit)
  ... The following security advisory is sent to the securiteam mailing list, and can be
  found at the SecuriTeam web site: http://www.securiteam.com ... Dim ConnectionPacket As String
  ' Declare our Connection String ... Dim DoSPacket As String ' Declare our DoS Packet ...
  Private Sub cmdAttack_Click ... (Securiteam)