-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : dhcp SUMMARY : Denial of service vulnerability DATE : 2003-04-04 18:34:00 ID : CLA-2003:616 RELEVANT RELEASES : 8 - ------------------------------------------------------------------------- DESCRIPTION The package "dhcp" provides a Dynamic Host Configuration Protocol[1] server developed by ISC (ISC DHCPD). Florian Lohoff discovered[2] a vulnerability[3,4] in the way dhcrelay (part of the dhcp package) forwards malicious BOOTP packets it receives to the dhcp servers it contacts. An attacker could exploit this vulnerability to generate a "storm" of BOOTP packets, causing a denial of service condition or a misbehavior by the part of the dhcp server. The Common Vulnerabilities and Exposures project (cve.mitre.org) is tracking[5] this issue with the name CAN-2003-0039. The packages provided with this announcement fix these vulnerabilities with a patch, keeping the original version. Please note that Conectiva Linux versions prior to 8 do not ship dhcp 3.0 and therefore are not vulnerable to this problem. SOLUTION All dhcp users should upgrade immediately. After upgrading the packages, please restart the dhcpd service if it is already running. This can be done with the command below (as the root user): # service dhcpd restart REFERENCES: 1.http://www.ietf.org/rfc/rfc2131.txt 2.http://online.securityfocus.com/archive/1/307451 3.http://online.securityfocus.com/bid/6628 4.http://www.kb.cert.org/vuls/id/149953 5.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0039 UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/8/RPMS/dhcp-3.0-3U80_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/dhcp-doc-3.0-3U80_3cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/dhcp-3.0-3U80_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 - ------------------------------------------------------------------------- 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 - ------------------------------------------------------------------------- Copyright 2003 (c) Conectiva Inc. http://www.conectiva.com - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribeat_private unsubscribe: conectiva-updates-unsubscribeat_private -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE+jfq342jd0JmAcZARAvN5AJ9vv7jcbf8tm2D8ff8E5MRzsBXn+QCfbE73 89tYWbDrgrNG5f6engkx/Ww= =Bo/V -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Fri Apr 04 2003 - 13:33:21 PST