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Category:   Application (Security)  >   Wireshark Vendors:   Wireshark.org
(Conectiva Issues Fix) Ethereal Network Sniffer Has Multiple Bugs That May Allow Remote Users to Send Packets to Execute Arbitrary Code or Cause the Sniffer to Hang or Crash
SecurityTracker Alert ID:  1004712
SecurityTracker URL:  http://securitytracker.com/id/1004712
CVE Reference:   CAN-2002-0012, CAN-2002-0013, CAN-2002-0353, CAN-2002-0401, CAN-2002-0402, CAN-2002-0403, CAN-2002-0404   (Links to External Site)
Date:  Jul 4 2002
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.3 and prior
Description:   Several potential vulnerabilities have been reported in the Ethereal network sniffer. A remote user could cause the sniffer to crash or possibly execute arbitrary code.

According to the vendor, there are several bugs in Ethereal that could be exploited by remote users. A remote user could send a specially crafted packet over the network that Ethereal is monitoring to trigger these vulnerabilities. These security holes can also be triggered when a local user opens a malformed packet trace file.

The bugs are reported to exist in the following components:

- SMB dissector; a remote user could dereference a NULL pointer in two cases.
- X11 dissector; a remote user could trigger a buffer while parsing keysyms.
- DNS dissector; a remote user could create a malformed packet to cause this module to enter an infinite loop.
- GIOP dissector; a remote user could cause this module to allocate large amounts of memory.

Impact:   A remote user could cause Ethereal to hang or to crash or execute arbitrary code.
Solution:   Conectiva has released a fix.

ftp://atualizacoes.conectiva.com.br/6.0/RPMS/ethereal-0.9.5-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/ethereal-0.9.5-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/ethereal-0.9.5-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/ethereal-0.9.5-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-common-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-gtk-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-utils-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tethereal-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/ethereal-0.9.5-1U8_2cl.src.rpm

Users of Conectiva Linux version 6.0 or higher may use apt to perform upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet (you may also use linuxconf to do this):

rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

Vendor URL:  www.ethereal.com/appnotes/enpa-sa-00004.html (Links to External Site)
Cause:   Boundary error, State error
Underlying OS:   Linux (Mandriva/Mandrake)

Message History:   This archive entry is a follow-up to the message listed below.
May 21 2002 Ethereal Network Sniffer Has Multiple Bugs That May Allow Remote Users to Send Packets to Execute Arbitrary Code or Cause the Sniffer to Hang or Crash



 Source Message Contents

Date:  Thu, 4 Jul 2002 14:45:40 -0300
Subject:  [conectiva-updates] [CLA-2002:505] Conectiva Linux Security Announcement - ethereal


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT 
- --------------------------------------------------------------------------

PACKAGE   : ethereal
SUMMARY   : Several vulnerabilities
DATE      : 2002-07-04 14:42:00
ID        : CLA-2002:505
RELEVANT
RELEASES  : 6.0, 7.0, 8

- -------------------------------------------------------------------------

DESCRIPTION
 Ethereal is a powerful network traffic analyzer with an intuitive
 interface.
 
 This update addresses several vulnerabilities in ethereal <= 0.9.4 as
 stated[1][2] in the project's home page. The following protocol
 dissectors were vulnerable to various kinds of attacks (mainly DoS
 and arbitrary code execution): BGP, X11, DNS, GIOP, WCP, SOCKS, RSVP,
 AFS and LMP.
 
 These vulnerabilities can be exploited by an attacker who can insert
 crafted packets in the wire being monitored by ethereal or make an
 user open a trace file with such packets inside.


SOLUTION
 All ethereal users should upgrade their packages.
 
 
 REFERENCES:
 1.http://www.ethereal.com/appnotes/enpa-sa-00004.html
 2.http://www.ethereal.com/appnotes/enpa-sa-00005.html


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/ethereal-0.9.5-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/ethereal-0.9.5-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/ethereal-0.9.5-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/ethereal-0.9.5-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-common-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-gtk-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-utils-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tethereal-0.9.5-1U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/ethereal-0.9.5-1U8_2cl.src.rpm


ADDITIONAL INSTRUCTIONS
 Users of Conectiva Linux version 6.0 or higher may use apt to perform 
 upgrades of RPM packages:
 - add the following line to /etc/apt/sources.list if it is not there yet
   (you may also use linuxconf to do this):

 rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

 - run:                 apt-get update
 - after that, execute: apt-get upgrade

 Detailed instructions reagarding the use of apt and upgrade examples 
 can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en


- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at 
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE9JInD42jd0JmAcZARAlIKAKCZMp3KJKE/p2+XZOpBP0SnwgTNPwCgywp2
USgMD1wKVgM5oM5pw5qt8RA=
=QRxm
-----END PGP SIGNATURE-----



 
 


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