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Neohapsis > Archives > Bugtraq> 2002-06

From: secureconectiva.com.br
Date: Thu Jun 06 2002 - 13:01:50 CDT

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : bind
SUMMARY : Denial of Service vulnerability
DATE : 2002-06-06 15:01:00
ID : CLA-2002:494
RELEVANT
RELEASES : 7.0, 8

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DESCRIPTION
"bind" is a name server (DNS) developed by the ISC and used in many
internet and intranet sites.

ISC (Internet Software Consortium) reported a remote denial of
service vulnerability[2] in the BIND[1] server. A remote attacker can
exploit this problem and shut down the name server.

This vulnerability only affects the 9.x versions of the server and
has no other consequence besides shutting down the service.

An indication that the service has been shut down due to this problem
are the following messages in the system log (/var/log/messages):

named: message.c:808: REQUIRE(*rdataset == ((void *)0)) failed
named: exiting (due to assertion failure)

Please note that regular DNS traffic could also accidentally trigger
this problem.

ISC has released BIND version 9.2.1 to address this vulnerability.

SOLUTION
It is recommended that all bind users upgrade their packages. The
"named" service will be automatically restarted if it was already
running before the upgrade.

REFERENCES
1. http://www.isc.org/products/BIND/bind9.html
2. http://www.kb.cert.org/vuls/id/739123
3. http://www.cert.org/advisories/CA-2002-15.html
4. http://www.isc.org/products/BIND/bind-security.html

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

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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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