[CLA-2002:538] Conectiva Linux Security Announcement - tar/unzip
Date: Tue, 29 Oct 2002 20:12:14 -0200
From: secure@conectiva.com.br
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
Subject: [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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