-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : gnupg SUMMARY : Fix for two gnupg vulnerabilities DATE : 2001-06-07 15:44:00 ID : CLA-2001:399 RELEVANT RELEASES : 4.0, 4.0es, 4.1, 4.2, 5.0, prg graficos, ecommerce, 5.1, 6.0 - ------------------------------------------------------------------------- DESCRIPTION Gnupg is a OpenPGP-compliant tool for secure communication used to, for example, sign emails, encrypt and decrypt sensitive data and verify signed text. Two vulnerabilities are being addressed with this update: 1) Versions prior to 1.0.5 have a vulnerability that would allow an attacker to obtain the unencrypted private key of an user. In order to do that, the attacker would have to obtain a copy of the private key (which is encrypted), alter it in a specific way and put it back without the user's knowledge. After that, by intercepting a message that was signed with the replaced key, the attacker would be able to reconstruct the private key (unencrypted). With this key, the attacker would be able to personificate the user and be able to read his/her encrypted mail or sign emails in his/her name. 2) Versions prior to 1.0.6 have a format string vulnerability that allows the execution of arbitrary code just by decrypting an encrypted file with a special filename. The flaw occurs when that filename is printed to the screen. By using the "--batch" option, this output is suppressed, and the user is then not affected. An exploit for this flaw has already been published. SOLUTION It is recommended that all gnupg users upgrade the package. CREDITS/REFERENCES - fish stiqz <fishat_private>, who reported the format string vulnerability (http://www.securityfocus.com/archive/1/187352); - Werner Koch, Gnupg maintainer, quickly published a new version; - ICZ researchers, who reported the private key recovery vulnerability (http://www.icz.cz/en/onas/krypto.html); DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/4.0/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.0/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.0/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.0es//SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.0es/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.0es/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.1/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.1/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.1/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.2/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/4.2/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/4.2/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/gnupg-doc-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/gnupg-1.0.6-1cl.src.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/gnupg-1.0.6-1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/gnupg-doc-1.0.6-1cl.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 - ------------------------------------------------------------------------- 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 - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribeat_private unsubscribe: conectiva-updates-unsubscribeat_private -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7H8uj42jd0JmAcZARAm6sAJ9uIkJhv9LITxCMFxCOnirmNaB1BQCeMQ// oBlesOAkhzhdN8Pvbt1JKyU= =+q+e -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Thu Jun 07 2001 - 13:18:28 PDT