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Category:   Application (Generic)  >   Wireshark Vendors:   Wireshark.org
(Gentoo Issues Fix) Ethereal DICOM, HTTP, and SMB Dissector Bugs Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012617
SecurityTracker URL:  http://securitytracker.com/id/1012617
CVE Reference:   CVE-2004-1139, CVE-2004-1140, CVE-2004-1141, CVE-2004-1142   (Links to External Site)
Date:  Dec 19 2004
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.0 through 0.10.7
Description:   Several vulnerabilities were reported in Ethereal, affecting the DICOM, HTTP, and SMB protocol dissectors. A remote user can cause the target service to crash or to execute arbitrary code.

The vendor reported an unspecified denial of service flaw in the DICOM dissector in versions 0.10.4 through 0.10.7 [CVE: CAN 2004-1139]. Matthew Bing is credited with discovering this flaw.

It is also reproted that a remote user can send a packet with an invalid RTP timestamp to cause the target Ethereal process to hang and create a large temporary file [CVE: CAN 2004-1140]. The temporary file may consume all available disk space. Versions 0.9.16 through 0.10.7 are affected.

It is also reported that a remote user can cause the HTTP dissector to access previously-freed memory and crash [CVE: CAN 2004-1141]. Versions 0.10.1 through 0.10.7 are affected.

It is also reported that a remote user can send a specially crafted SMB packet to cause the target Ethereal process to hang and consume all available CPU resources [CVE: CAN 2004-1142]. Versions 0.9.0 through 0.10.7 are affected. Brian Caswell is credited with discovering this flaw.

In each of these cases, a remote user can send a specially crafted packet to or via a network monitored by Ethereal to trigger the flaws. A remote user can also create a specially crafted packet trace file that, when played by the target user, will trigger the flaws.

Impact:   A remote user can cause the target service to crash or to execute arbitrary code.
Solution:   Gentoo has released a fix and indicates that all ethereal users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/ethereal-0.10.8"

Vendor URL:  www.ethereal.com/appnotes/enpa-sa-00016.html (Links to External Site)
Cause:   Access control error, Exception handling error, Input validation error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Dec 15 2004 Ethereal DICOM, HTTP, and SMB Dissector Bugs Let Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200412-15 ] Ethereal: Multiple vulnerabilities


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Gentoo Linux Security Advisory                           GLSA 200412-15
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Ethereal: Multiple vulnerabilities
      Date: December 19, 2004
      Bugs: #74443
        ID: 200412-15

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Synopsis
========

Multiple vulnerabilities exist in Ethereal, which may allow an attacker
to run arbitrary code, crash the program or perform DoS by CPU and disk
utilization.

Background
==========

Ethereal is a feature rich network protocol analyzer.

Affected packages
=================

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/ethereal      < 0.10.8                     >= 0.10.8

Description
===========

There are multiple vulnerabilities in versions of Ethereal earlier than
0.10.8, including:

* Bug in DICOM dissection discovered by Bing could make Ethereal
  crash (CAN 2004-1139).

* An invalid RTP timestamp could make Ethereal hang and create a
  large temporary file (CAN 2004-1140).

* The HTTP dissector could access previously-freed memory (CAN
  2004-1141).

* Brian Caswell discovered that an improperly formatted SMB could
  make Ethereal hang (CAN 2004-1142).

Impact
======

An attacker might be able to use these vulnerabilities to crash
Ethereal, perform DoS by CPU and disk space utilization or even execute
arbitrary code with the permissions of the user running Ethereal, which
could be the root user.

Workaround
==========

For a temporary workaround you can disable all affected protocol
dissectors by selecting Analyze->Enabled Protocols... and deselecting
them from the list. However, it is strongly recommended to upgrade to
the latest stable version.

Resolution
==========

All ethereal users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/ethereal-0.10.8"

References
==========

  [ 1 ] Ethereal enpa-sa-00016
        http://www.ethereal.com/appnotes/enpa-sa-00016.html
  [ 2 ] CAN 2004-1139
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1139
  [ 3 ] CAN 2004-1140
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1140
  [ 4 ] CAN 2004-1141
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1141
  [ 5 ] CAN 2004-1142
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1142

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200412-15.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0

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