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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : tcpdump
SUMMARY   : Several vulnerabilities
DATE      : 2003-04-22 12:13:00
ID        : CLA-2003:629
RELEVANT
RELEASES  : 6.0, 7.0, 8

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DESCRIPTION
 Tcpdump is a command-line tool for monitoring network traffic.
 
 This update fixes several vulnerabilities found in tcpdump:
 
 - Infinite loop vulnerability[1] when parsing ISAKMP packets.
 A remote atacker can cause tcpdump to enter an infinite loop by
 injecting specially crafted ISAKMP packets (UDP port 500) in the
 network being monitored by it. This vulnerability was discovered by
 Andrew Griffiths and iDEFENSE Labs and has the name CVE-2003-0108
 assigned[2] by the Common Vulnerabilities and Exposures (CVE)
 project.
 
 - Infinite loop vulnerability when parsing BGP packets.
 This vulnerability can be exploited in a similar way of the previous
 one, but using BGP packets. It was discovered by the tcpdump
 developers.
 
 - Buffer overflow when parsing NFS traffic.
 tcpdump fails to check the boundaries of some buffers when parsing
 NFS traffic. A remote atacker can exploit this vulnerability to crash
 the tcpdump process or to potentially execute arbitrary code with the
 privileges of the user running it (tcpdump is usually run by the root
 user). This vulnerability was discovered by the tcpdump developers.
 
 Even though libpcap is not affected by these vulnerabilities, new
 packages are being provided for Conectiva Linux 6.0 and 7.0 because
 they are generated together with tcpdump from the same SRPM package.


SOLUTION
 All tcpdump users should upgrade.
 
 Please note that the packages listed in this announcement are
 available in our FTP servers since March 10th, 2003.
 
 
 REFERENCES:
 1.http://www.idefense.com/advisory/02.27.03.txt
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0108
 3.http://www.tcpdump.org/tcpdump-changes.txt


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-0.6.2-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-0.6.2-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-static-0.6.2-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/tcpdump-3.6.2-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/tcpdump-3.6.2-1U60_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-0.6.2-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-0.6.2-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-static-0.6.2-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/tcpdump-3.6.2-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/tcpdump-3.6.2-1U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tcpdump-3.6.2-3U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/tcpdump-3.6.2-3U80_3cl.src.rpm


ADDITIONAL INSTRUCTIONS
 The apt tool can be used to perform RPM packages upgrades:

 - 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

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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

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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