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Home » Hacking News » CLA-2002:491-Buffer Overflow when parsing NFS traffic

CLA-2002:491-Buffer Overflow when parsing NFS traffic

by Nikola Strahija on June 5th, 2002 Tcpdump is a command-line tool for monitoring network traffic. David Woodhouse discovered[1] a buffer overflow vulnerability in tcpdump when it is parsing NFS traffic. A remote attacker could exploit this to at least crash the tcpdump process. Even though arpwatch and libpcap are not affected by this vulnerability, new packages for them are being provided for Conectiva Linux 6.0 and 7.0 since they are generated together with tcpdump from the same SRPM package.


SOLUTION
All tcpdump users should upgrade.


REFERENCES:
1.http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=55145


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/arpwatch-2.1a11-9U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-0.6.2-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-0.6.2-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpcap-devel-static-0.6.2-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/tcpdump-3.6.2-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/tcpdump-3.6.2-1U60_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/arpwatch-2.1a11-9U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-0.6.2-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-0.6.2-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpcap-devel-static-0.6.2-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/tcpdump-3.6.2-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/tcpdump-3.6.2-1U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tcpdump-3.6.2-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/tcpdump-3.6.2-3U8_2cl.src.rpm


ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
(you may also use linuxconf to do this):

rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

- 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


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

- -------------------------------------------------------------------------
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