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Date: Thu, 10 Apr 2003 17:07:08 -0300 From: Conectiva Updates <secure@...ectiva.com.br> To: conectiva-updates@...aleguas.conectiva.com.br, lwn@....net, bugtraq@...urityfocus.com, security-alerts@...uxsecurity.com, linsec@...ts.seifried.org Subject: [CLA-2003:625] Conectiva Security Announcement - openssl -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : openssl SUMMARY : OpenSSL library vulnerabilities DATE : 2003-04-10 17:06:00 ID : CLA-2003:625 RELEVANT RELEASES : 6.0, 7.0, 8 - ------------------------------------------------------------------------- DESCRIPTION OpenSSL[1] implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as full-strength general purpose cryptography functions. It is used (as a library) by several projects, like Apache, OpenSSH, Bind, OpenLDAP and many others clients and servers programs. This OpenSSL update addresses the issues outlined below: 1) Klima-Pokorny-Rosa attack (CAN-2003-0131)[2][3] Vlastimil Klima, Ondrej Pokorny and Tomas Rosa published[6] a paper where they present an extension to the Bleichenbacher attack on RSA with PKCS #1 v1.5 padding as used in SSL 3.0 and TLS 1.0. This vulnerability would allow a remote attacker to perform a single RSA private key operation on a ciphertext of his/her choice using the server's RSA key after analysing the server's behaviour with a large number of specially crafted connections. 2) Timing attack (CAN 2003-147)[4][5] D. Boneh and D. Brumley published[7] a paper in which they demonstrate that remote timing attacks are possible and practical against OpenSSL and derived libraries. They successfully extracted private keys from a webserver in a local network. In order to prevent such attacks, a technique known as RSA blinding has been turned on by default in OpenSSL. Additionally, some smaller fixes from newer versions of OpenSSL have been included in the packages provided via this update. SOLUTION It is recommended that all users upgrade their openssl packages. Please note that it is necessary to restart services which use the library (such as the apache web server with SSL enabled) so that the new, fixed, version is used. A list of such applications can be obtained after the upgrade with the following command: lsof | grep libssl The first column will contain the name of the application that needs to be restarted. If there is any doubt about which application has to be restarted or how to do it, we recommend that the system be rebooted. REFERENCES 1. http://www.openssl.org 2. http://www.openssl.org/news/secadv_20030319.txt 3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0131 4. http://www.openssl.org/news/secadv_20030317.txt 5. http://cve.mitre.org/cgi-bin/cvename.cgi?name=2003-147 6. http://eprint.iacr.org/2003/052/ 7. http://crypto.stanford.edu/~dabo/abstracts/ssl-timing.html UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/openssl-0.9.6-4U60_6cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssl-0.9.6-4U60_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/openssl-devel-0.9.6-4U60_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/openssl-0.9.6a-3U70_6cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-0.9.6a-3U70_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-devel-0.9.6a-3U70_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-devel-static-0.9.6a-3U70_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-doc-0.9.6a-3U70_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/openssl-progs-0.9.6a-3U70_6cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/openssl-0.9.6c-2U80_5cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-0.9.6c-2U80_5cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-devel-0.9.6c-2U80_5cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-devel-static-0.9.6c-2U80_5cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-doc-0.9.6c-2U80_5cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/openssl-progs-0.9.6c-2U80_5cl.i386.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 (c) 2003 Conectiva Inc. http://www.conectiva.com - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribe@...aleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@...aleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE+lc7r42jd0JmAcZARAip0AJoDvvm1RVsAEu8qZfBfwkXsQ4cdtwCfdQpD SeYHxfmGDOUKpgMHY/nlU7g= =YOzn -----END PGP SIGNATURE-----
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