-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : anonftp SUMMARY : Remote denial of service vulnerability DATE : 2003-10-24 14:49:00 ID : CLA-2003:771 RELEVANT RELEASES : 7.0, 8, 9 - ------------------------------------------------------------------------- DESCRIPTION The anonftp package contains a chroot environment used by some FTP servers (e. g. wu-ftpd) when serving anonymous FTP sessions. Among the utilities provided, is the "ls" program, used to list information about files and directories. This update is a follow-up to the CLSA-2003:768 announcement[1], which fixed a memory starvation vulnerability in the ls program (from the fileutils package). Since the anonftp package contains a copy of the ls program, it is also being updated. Below is a copy of our previous text describing the vulnerability: Georgi Guninski discovered[2] 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). The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0854[3] to this issue. This vulnerability is remotely exploitable in scenarios where remote applications allow users to call ls without filtering the supplied parameters. An example of such a scenario is the use of the wu-ftpd FTP server. Additionally, this update fixes an integer overflow in ls which seems to be 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[4] to this issue. SOLUTION All users of the anonftp package should upgrade. REFERENCES 1.http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000768&idioma=en 2.http://www.guninski.com/binls.html 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0854 4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0853 UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/7.0/RPMS/anonftp-3.0-7U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/anonftp-3.0-7U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/anonftp-3.0-9U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/anonftp-3.0-9U80_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/9/RPMS/anonftp-3.0-22686U90_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/9/SRPMS/anonftp-3.0-22686U90_2cl.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/mVoC42jd0JmAcZARAlS4AKDWB6D3ct6gIoAud/2kp8iLxa1zOwCdEO13 /Pq7zEZpidAqTkRrYhLdiHE= =zS3P -----END PGP SIGNATURE-----
