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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : unzip
SUMMARY   : Directory transversal vulnerability
DATE      : 2003-07-02 18:57:00
ID        : CLA-2003:672
RELEVANT
RELEASES  : 7.0, 8, 9

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DESCRIPTION
 unzip is a program widely used for the distribution of multiple files
 concatenated/compacted (a file commonly known as an "archive").
 
 A vulnerability has been found in the way unzip extracts files with
 invalid characters between two '.' (dot) characters in their
 path/names. These characters are filtered and result in a ".."
 sequence (indicating the parent directory). By exploiting this
 vulnerability, an attacker can overwrite arbitrary files if the user
 unpacking such an archive has sufficient filesystem permissions to do
 so.
 
 The Common Vulnerabilities and Exposures project (cve.mitre.org) has
 assigned the name CAN-2003-0282 to this issue.


SOLUTION
 All unzip users should upgrade.
 
 
 REFERENCES:
 1.http://marc.theaimsgroup.com/?l=bugtraq&m=105259038503175
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0282


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/unzip-5.50-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/unzip-5.50-1U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/unzip-5.50-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/unzip-5.50-1U80_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/unzip-5.50-13860U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/unzip-5.50-13860U90_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

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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

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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