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[CLA-2002:538] Conectiva Linux Security Announcement - tar/unzip



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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : tar/unzip
SUMMARY   : Directory transversal vulnerabilities
DATE      : 2002-10-29 20:11:00
ID        : CLA-2002:538
RELEVANT
RELEASES  : 6.0, 7.0, 8

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DESCRIPTION
 tar and unzip are programs widely used for distribution of multiple
 files concatenated (commonly known as an "archive").
 
 Both tar and unzip have directory transversal vulnerabilities in the
 way they extract filenames containning ".." or "/" characteres at the
 beginning.
 
 By exploiting these vulnerabilities, a malicious user 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 names CAN-2001-1267, CAN-2001-1268, CAN-2001-1269 and
 CAN-2002-0399 to this issue.


SOLUTION
 All users should upgrade.
 
 * Important note for Conectiva Linux 6.0 users:
 In the version of tar distributed with Conectiva Linux 6.0 the
 command line option used to enable bzip2 compression was '-I'. It was
 changed to '-j' in recent versions (including the one of this
 update).
 
 
 REFERENCES:
 1.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1267
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1268
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1269
 4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0399


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/tar-1.13.25-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/unzip-5.50-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/tar-1.13.25-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/unzip-5.50-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/tar-1.13.25-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/unzip-5.50-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/tar-1.13.25-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/unzip-5.50-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tar-1.13.25-2U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/unzip-5.50-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/tar-1.13.25-2U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/unzip-5.50-1U80_1cl.src.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


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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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