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               Fedora Legacy Update Advisory

Synopsis:          Updated tcpdump resolves security vulnerability
Advisory ID:       FLSA:1222
Issue date:        2004-01-31
Product:           Red Hat Linux
Keywords:          Security
Cross references:   
CVE Names:         CAN-2003-0989, CAN-2004-0055, CAN-2004-0057
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1. Topic:

Updated tcpdump packages are now available that fix multiple security 
vulnerabilities which may allow remote attackers to exploit these issues 
by sending carefully-crafted packets to a victim. If the victim uses 
tcpdump, these packets could result in a denial of service, or possibly 
execute arbitrary code as the 'pcap' user.

2. Relevant releases/architectures:

Red Hat Linux 7.2 - i386
Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386

3. Problem description:

Tcpdump is a command-line tool for monitoring network traffic. Tcpdump can 
capture and display the packet headers on a particular network interface 
or on all interfaces. Tcpdump can display all of the packet headers, or 
just the ones that match particular criteria.

George Bakos discovered flaws in the ISAKMP decoding routines of tcpdump 
versions prior to 3.8.1. The Common Vulnerabilities and Exposures project 
(cve.mitre.org) has assigned the name CAN-2003-0989 to this issue.

Jonathan Heusser discovered an additional flaw in the ISAKMP decoding 
routines for tcpdump 3.8.1 and earlier. The Common Vulnerabilities and 
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0057 to 
this issue.

Jonathan Heusser discovered a flaw in the print_attr_string function in the 
RADIUS decoding routines for tcpdump 3.8.1 and earlier. The Common 
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the 
name CAN-2004-0055 to this issue.

Users of tcpdump should update to these update packages, which contain a 
backported security patch that corrects this issue.

Fedora Legacy would like to thank George Bakos and Jonathan Heusser for 
discovering and disclosing these issues, as well as Christian Pearce for 
providing a backported fix for Red Hat Linux 7.2, 7.3, and 8.0.

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 yum and apt.  Many 
people find this an easier way to apply updates.  To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate 
RPMs being upgraded on your system.  This assumes that you have yum or 
apt-get configured for obtaining Fedora Legacy content. Please visit  
  for directions on how to configure 
yum and apt-get.

5. Bug IDs fixed:
 
  - 1222 - tcpdump security fix in rh7x, rh80

6. RPMs required:

Red Hat Linux 7.2:

SRPMS: 
 
i386: 
  
  
 

Red Hat Linux 7.3:

SRPMS: 
 
i386: 
  
  
 

Red Hat Linux 8.0:

SRPMS: 
 
i386: 
  
  
 

7. Verification:

SHA1 sum                                 Package Name
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a10c0d99cd919f459a25fdb5562d6907667b33d3  
7.2/updates/SRPMS/tcpdump-3.6.3-17.7.2.4.legacy.src.rpm
e3777ee05d6b57a81fa08a96b64aa45a0758e42f  
7.2/updates/i386/tcpdump-3.6.3-17.7.2.4.legacy.i386.rpm
795dd99495f288aacea6a8775e9aba8eb801e570  
7.2/updates/i386/libpcap-0.6.2-17.7.2.4.legacy.i386.rpm
8e860cb231b7dd59345c2f82531d527ca78090b5  
7.2/updates/i386/arpwatch-2.1a11-17.7.2.4.legacy.i386.rpm
 
3b7cb6c9f62c259e2c24d056263281a44a5ce406  
7.3/updates/SRPMS/tcpdump-3.6.3-17.7.3.4.legacy.src.rpm
cc1f3f75f7eb32a1ea2aa224cbae64190e5dcaf5  
7.3/updates/i386/tcpdump-3.6.3-17.7.3.4.legacy.i386.rpm
5aeb410a107e4b82d0f62c6f8931d20998a8e1de  
7.3/updates/i386/libpcap-0.6.2-17.7.3.4.legacy.i386.rpm
7fbb66ee934dcb388489c94551c56ac74c3d0540  
7.3/updates/i386/arpwatch-2.1a11-17.7.3.4.legacy.i386.rpm
 
c9e455ef10ea70f69e269f6d71c3ded700424ca1  
8.0/updates/SRPMS/tcpdump-3.6.3-17.8.0.5.legacy.src.rpm
cbb7cd725a50be1cbdbc8ee75a357229e847afac  
8.0/updates/i386/tcpdump-3.6.3-17.8.0.5.legacy.i386.rpm
643931721424765748895f57f4ca53dba896378c  
8.0/updates/i386/libpcap-0.6.2-17.8.0.5.legacy.i386.rpm
1f9aacbd480af1a754adc9d6190ddc06d2b491ab  
8.0/updates/i386/arpwatch-2.1a11-17.8.0.5.legacy.i386.rpm

These packages are GPG signed by Fedora Legacy for security.  Our key is 
available from   

You can verify each package with the following command:

    rpm --checksig -v 

If you only wish to verify that each package has not been corrupted or 
tampered with, examine only the sha1sum with the following command:

    sha1sum 

8. References:
 
CVE -CVE-2003-0989 
CVE -CVE-2004-0055 
CVE -CVE-2004-0057 
http://marc.theaimsgroup.com/?l=tcpdump-workers&m=107325073018070&w=2
 

9. Contact:

The Fedora Legacy security contact is <secnotice@fedoralegacy.org>. More 
project details at  http://www.fedoralegacy.org

- -- 
Jesse Keating RHCE	 ( )
Fedora Legacy Team	 (http://www.fedoralegacy.org)