June 6, 2002

Conectiva Linux Advisory: bind

Conectiva: "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."







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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











DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES



ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/bind-9.2.1-1U70_2cl.src.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-chroot-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-devel-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-devel-static-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-doc-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/7.0/RPMS/bind-utils-9.2.1-1U70_2cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/SRPMS/bind-9.2.1-1U8_1cl.src.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-chroot-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-devel-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-devel-static-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-doc-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-libs-9.2.1-1U8_1cl.i386.rpmftp://atualizacoes.conectiva.com.br/8/RPMS/bind-utils-9.2.1-1U8_1cl.i386.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











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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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