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Category:   Application (Generic)  >   Wireshark Vendors:   Wireshark.org
(Mandrake Issues Fix) Ethereal Flaws in DCERPC, OSI, and Other Dissectors May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1007043
SecurityTracker URL:  http://securitytracker.com/id/1007043
CVE Reference:   CVE-2003-0428, CVE-2003-0429, CVE-2003-0430, CVE-2003-0431, CVE-2003-0432   (Links to External Site)
Updated:  Dec 4 2003
Original Entry Date:  Jun 24 2003
Impact:   Denial of service via network, Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.12
Description:   Several security vulnerabilities were reported in the Ethereal network sniffer. A remote user may be able to crash the sniffer or execute arbitrary code.

It is reported that some of the Ethereal protocol dissectors contain flaws in allocating memory and parsing strings.

The DCERPC dissector reportedly allocates too much memory in some cases when decoding a Network Data Representation (NDR) string. The OSI dissector reportedly contains a buffer overflow that can be triggered by invalid IPv4 or IPv6 prefix lengths. The SPNEGO dissector can be crashed when parsing an invalid ASN.1 value.

It is also reported that the tvb_get_nstringz0() function does not properly accommodate a zero-length buffer size and that the BGP, WTP, DNS, 802.11, ISAKMP, WSP, CLNP, ISIS, and RMI dissectors do not properly handle certain strings.

It is reported that a remote user can create specially crafted packets that will trigger these flaws when the sniffer is operating or when Ethereal reads captured packet traces from a file.

The vendor credits Timo Sirainen and others with reporting these flaws.

Impact:   A remote user can cause the sniffer to crash or to execute arbitrary code with the privileges of the Ethereal process (potentially with root privileges).
Solution:   Mandrake has released a fix:

Mandrake Linux 9.1:
b1564371c3ffbe52f832b1c9a7e05644 9.1/RPMS/ethereal-0.9.13-1.1mdk.i586.rpm
e36b73caf5b8ab321550e54d33ca8ac6 9.1/SRPMS/ethereal-0.9.13-1.1mdk.src.rpm

Mandrake Linux 9.1/PPC:
cc375732dd25961875bfda6356c09dd6 ppc/9.1/RPMS/ethereal-0.9.13-1.1mdk.ppc.rpm
e36b73caf5b8ab321550e54d33ca8ac6 ppc/9.1/SRPMS/ethereal-0.9.13-1.1mdk.src.rpm

Vendor URL:  www.ethereal.com/appnotes/enpa-sa-00010.html (Links to External Site)
Cause:   Boundary error, Input validation error
Underlying OS:  Linux (Mandriva/Mandrake)
Underlying OS Comments:  9.1

Message History:   This archive entry is a follow-up to the message listed below.
Jun 13 2003 Ethereal Flaws in DCERPC, OSI, and Other Dissectors May Let Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  MDKSA-2003:070 - Updated ethereal packages fix multiple vulnerabilities


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

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           ethereal
Advisory ID:            MDKSA-2003:070
Date:                   June 23rd, 2003

Affected versions:	9.1
________________________________________________________________________

Problem Description:

 A number of string handling bugs were found in the packet dissectors in
 ethereal that can be exploited using specially crafted packets to cause
 ethereal to consume excessive amounts of memory, crash, or even execute
 arbitray code.
 
 These vulnerabilities have been fixed upsteam in ethereal 0.9.13 and
 all users are encouraged to upgrade.
________________________________________________________________________

References:
  
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0428
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0429
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0431
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0432
  http://www.ethereal.com/appnotes/enpa-sa-00010.html
________________________________________________________________________

Updated Packages:
  
 Mandrake Linux 9.1:
 b1564371c3ffbe52f832b1c9a7e05644  9.1/RPMS/ethereal-0.9.13-1.1mdk.i586.rpm
 e36b73caf5b8ab321550e54d33ca8ac6  9.1/SRPMS/ethereal-0.9.13-1.1mdk.src.rpm

 Mandrake Linux 9.1/PPC:
 cc375732dd25961875bfda6356c09dd6  ppc/9.1/RPMS/ethereal-0.9.13-1.1mdk.ppc.rpm
 e36b73caf5b8ab321550e54d33ca8ac6  ppc/9.1/SRPMS/ethereal-0.9.13-1.1mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.  The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

  http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig <filename>

All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team from:

  https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other update advisories for Mandrake Linux at:

  http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

  http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

  security_linux-mandrake.com

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security linux-mandrake.com>

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