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Category:   Application (Generic)  >   Wireshark Vendors:   Wireshark.org
(Red Hat Issues Fix) Ethereal SOCKS Dissector Format String Flaw and NTLMSSP Overflow Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1006640
SecurityTracker URL:  http://securitytracker.com/id/1006640
CVE Reference:   CAN-2003-0081, CAN-2003-0159   (Links to External Site)
Updated:  Dec 10 2003
Original Entry Date:  Apr 24 2003
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): from 0.8.7 to 0.9.9
Description:   Two vulnerabilities were reported in the Ethereal network sniffer. A remote user may be able to cause the sniffer to crash or to execute arbitrary code.

Georgi Guninski reported that a format string flaw resides in 'packet-socks.c' in the proto_tree_add_text() function. User supplied input is provided to the format_text() function without the proper formatting string and without proper input validation.

A remote user can create a specially crafted SOCKS packet and send it to or via a network that is monitored by Ethereal to cause the Ethereal process to crash or execute arbitrary code.

A demonstration exploit is provided in the Source Message. The author's advisory is available at:

http://www.guninski.com/etherre.html

The vendor has also reported that the NTLMSSP code contains a heap overflow.

Impact:   A remote user may be able to cause the Ethereal process to crash or to execute arbitrary code.
Solution:   Red Hat has released a fix.

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/ethereal-0.9.11-1.72.1.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/ethereal-0.9.11-1.72.1.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/ethereal-gnome-0.9.11-1.72.1.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/ethereal-0.9.11-1.72.1.ia64.rpm
ftp://updates.redhat.com/7.2/en/os/ia64/ethereal-gnome-0.9.11-1.72.1.ia64.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/ethereal-0.9.11-1.73.0.src.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/ethereal-0.9.11-1.73.0.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/ethereal-gnome-0.9.11-1.73.0.i386.rpm

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/ethereal-0.9.11-1.80.0.src.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/ethereal-0.9.11-1.80.0.i386.rpm
ftp://updates.redhat.com/8.0/en/os/i386/ethereal-gnome-0.9.11-1.80.0.i386.rpm

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/ethereal-0.9.11-0.90.1.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/ethereal-0.9.11-0.90.1.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/ethereal-gnome-0.9.11-0.90.1.i386.rpm

The verification checksums are:

MD5 sum Package Name

89898ad3538a3df96c71b58ebb813837 7.2/en/os/SRPMS/ethereal-0.9.11-1.72.1.src.rpm
bb344359597ccb7615cdc0af649cfc71 7.2/en/os/i386/ethereal-0.9.11-1.72.1.i386.rpm
c2a337a3d0670a261ed9716849a55c2c 7.2/en/os/i386/ethereal-gnome-0.9.11-1.72.1.i386.rpm
6713d547a4fa764702db39acc1905cb9 7.2/en/os/ia64/ethereal-0.9.11-1.72.1.ia64.rpm
f1370888122b91b3393698b4ba102254 7.2/en/os/ia64/ethereal-gnome-0.9.11-1.72.1.ia64.rpm
d10c8fd89468d8ce2c041ae4c325c947 7.3/en/os/SRPMS/ethereal-0.9.11-1.73.0.src.rpm
87509fd61fbc23186ac9b7184e1ec504 7.3/en/os/i386/ethereal-0.9.11-1.73.0.i386.rpm
024a5676609dd20946d5ffb44e3a1a4f 7.3/en/os/i386/ethereal-gnome-0.9.11-1.73.0.i386.rpm
852e037f04e4cefa9a13b8d1b78b022c 8.0/en/os/SRPMS/ethereal-0.9.11-1.80.0.src.rpm
dc86fd356f25c613b39925f27773df73 8.0/en/os/i386/ethereal-0.9.11-1.80.0.i386.rpm
25392c93d3c66f7d73fee99a8a377ccd 8.0/en/os/i386/ethereal-gnome-0.9.11-1.80.0.i386.rpm
47a604a2823bca19f9e5b4cbc52310a9 9/en/os/SRPMS/ethereal-0.9.11-0.90.1.src.rpm
9587d1e2f30eb4f87323c3224bb434a2 9/en/os/i386/ethereal-0.9.11-0.90.1.i386.rpm
1999cc86871e8698b0267c40cb9e856f 9/en/os/i386/ethereal-gnome-0.9.11-0.90.1.i386.rpm

Vendor URL:  www.ethereal.com/appnotes/enpa-sa-00008.html (Links to External Site)
Cause:   Boundary error, Input validation error
Underlying OS:   Linux (Red Hat Linux)

Message History:   This archive entry is a follow-up to the message listed below.
Mar 8 2003 Ethereal SOCKS Dissector Format String Flaw and NTLMSSP Overflow Let Remote Users Execute Arbitrary Code



 Source Message Contents

Date:  Wed, 23 Apr 2003 16:22 -0400
Subject:  [RHSA-2003:076-01] Updated ethereal packages fix security vulnerabilities


---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated ethereal packages fix security vulnerabilities
Advisory ID:       RHSA-2003:076-01
Issue date:        2003-04-23
Updated on:        2003-04-23
Product:           Red Hat Linux
Keywords:          
Cross references:  
Obsoletes:         RHSA-2002:290
CVE Names:         CAN-2003-0081 CAN-2003-0159
---------------------------------------------------------------------

1. Topic:

Updated ethereal packages are now available which fix a format string
bug and a heap-based buffer overflow.

2. Relevant releases/architectures:

Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386
Red Hat Linux 9 - i386

3. Problem description:

Ethereal is a package designed for monitoring network traffic on your
system.

Ethereal 0.9.9 and earlier allows remote attackers to cause a denial
of service (crash) and possibly execute arbitrary code via carefully
crafted SOCKS packets.  Red Hat would like to thank Georgi Guninski for
reporting this issue.

Additionally, a heap-based buffer overflow in the NTLMSSP code for Ethereal
0.9.9 and earlier allows remote attackers to cause a denial of service and
possibly execute arbitrary code.

Users of Ethereal should update to the erratum packages containing Ethereal
version 0.9.11 which are not vulnerable to these issues.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. RPMs required:

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/ethereal-0.9.11-1.72.1.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/ethereal-0.9.11-1.72.1.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/ethereal-gnome-0.9.11-1.72.1.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/ethereal-0.9.11-1.72.1.ia64.rpm
ftp://updates.redhat.com/7.2/en/os/ia64/ethereal-gnome-0.9.11-1.72.1.ia64.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/ethereal-0.9.11-1.73.0.src.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/ethereal-0.9.11-1.73.0.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/ethereal-gnome-0.9.11-1.73.0.i386.rpm

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/ethereal-0.9.11-1.80.0.src.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/ethereal-0.9.11-1.80.0.i386.rpm
ftp://updates.redhat.com/8.0/en/os/i386/ethereal-gnome-0.9.11-1.80.0.i386.rpm

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/ethereal-0.9.11-0.90.1.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/ethereal-0.9.11-0.90.1.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/ethereal-gnome-0.9.11-0.90.1.i386.rpm



6. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
89898ad3538a3df96c71b58ebb813837 7.2/en/os/SRPMS/ethereal-0.9.11-1.72.1.src.rpm
bb344359597ccb7615cdc0af649cfc71 7.2/en/os/i386/ethereal-0.9.11-1.72.1.i386.rpm
c2a337a3d0670a261ed9716849a55c2c 7.2/en/os/i386/ethereal-gnome-0.9.11-1.72.1.i386.rpm
6713d547a4fa764702db39acc1905cb9 7.2/en/os/ia64/ethereal-0.9.11-1.72.1.ia64.rpm
f1370888122b91b3393698b4ba102254 7.2/en/os/ia64/ethereal-gnome-0.9.11-1.72.1.ia64.rpm
d10c8fd89468d8ce2c041ae4c325c947 7.3/en/os/SRPMS/ethereal-0.9.11-1.73.0.src.rpm
87509fd61fbc23186ac9b7184e1ec504 7.3/en/os/i386/ethereal-0.9.11-1.73.0.i386.rpm
024a5676609dd20946d5ffb44e3a1a4f 7.3/en/os/i386/ethereal-gnome-0.9.11-1.73.0.i386.rpm
852e037f04e4cefa9a13b8d1b78b022c 8.0/en/os/SRPMS/ethereal-0.9.11-1.80.0.src.rpm
dc86fd356f25c613b39925f27773df73 8.0/en/os/i386/ethereal-0.9.11-1.80.0.i386.rpm
25392c93d3c66f7d73fee99a8a377ccd 8.0/en/os/i386/ethereal-gnome-0.9.11-1.80.0.i386.rpm
47a604a2823bca19f9e5b4cbc52310a9 9/en/os/SRPMS/ethereal-0.9.11-0.90.1.src.rpm
9587d1e2f30eb4f87323c3224bb434a2 9/en/os/i386/ethereal-0.9.11-0.90.1.i386.rpm
1999cc86871e8698b0267c40cb9e856f 9/en/os/i386/ethereal-gnome-0.9.11-0.90.1.i386.rpm


These packages are GPG signed by Red Hat for security.  Our key is
available at http://www.redhat.com/solutions/security/news/publickey/

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    
    md5sum <filename>


7. References:

http://www.ethereal.com/appnotes/enpa-sa-00008.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0081
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0159

8. Contact:

The Red Hat security contact is <security@redhat.com>.  More contact
details at http://www.redhat.com/solutions/security/news/contact/

Copyright 2003 Red Hat, Inc.



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