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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : fileutils SUMMARY : Denial of service vulnerability (exploitable through wu-ftpd) DATE : 2003-10-22 16:10:00 ID : CLA-2003:768 RELEVANT RELEASES : 7.0, 8, 9 - ------------------------------------------------------------------------- DESCRIPTION The fileutils package contains several basic system utilities. One of these utilities is the "ls" program, used to list information about files and directories. Georgi Guninski discovered[1] a memory starvation denial of service vulnerability in the ls program. It is possible to make ls allocate a huge amount of memory by calling it with the parameters "-w X -C" (where X is an arbitrary large number). This vulnerability is remotely exploitable in scenarios where remote applications allow an user to call ls without filtering the supplied parameters. An example of such scenario is the use of the wu-ftpd FTP server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0854[2] to this issue. Additionally, this update fixes an integer overflow in ls which seems non-exploitable. The overflow occurs in the usage of the "-w" parameter under the same circumstances of the aforementioned memory starvation vulnerability. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0853[3] to this issue. SOLUTION All users should upgrade. REFERENCES: 1.http://www.guninski.com/binls.html 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0854 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0853 UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/7.0/RPMS/fileutils-4.0-20U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/fileutils-4.0-20U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/fileutils-4.1-3U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/fileutils-4.1-3U80_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/fileutils-4.1-7779U90_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/SRPMS/fileutils-4.1-7779U90_1cl.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 (c) 2003 Conectiva Inc. http://www.conectiva.com - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE/lsiy42jd0JmAcZARAgC0AKDdWNVAcA5PLGcmjgzfnCpxi37cmwCg6oAY NM8FCmr4cf22nURHBBkX2YM= =z9ff -----END PGP SIGNATURE-----