Conectiva alert CLA-2003:724 (unzip)

From:
    	     
 
Conectiva Updates <secure@conectiva.com.br>
To:
    	     
 
conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
 bugtraq@securityfocus.com, security-alerts@linuxsecurity.com,
 linsec@lists.seifried.org
Subject:
    	     
 
[CLA-2003:724] Conectiva Security Announcement - unzip
Date:
    	     
 
Mon, 18 Aug 2003 19:53:30 -0300

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : unzip
SUMMARY   : Directory transversal vulnerability [UPDATE]
DATE      : 2003-08-18 19:52:00
ID        : CLA-2003:724
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").
 
 This is a reedition of the announcement CLSA-2003:672[1].
 
 A vulnerability[2] 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[3].
 
 [Updated 2003-Aug-18]
 Ben Laurie found that the original patch for this vulnerability was
 missing a case where the file name/path contains a quoted slash. This
 update includes a new patch that fix this issue.


SOLUTION
 All unzip users should upgrade.
 
 
 REFERENCES:
 1.http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000672&idioma=en
 2.http://marc.theaimsgroup.com/?l=bugtraq&m=105259038503175
 3.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_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/unzip-5.50-1U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/unzip-5.50-1U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/unzip-5.50-1U80_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/unzip-5.50-13860U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/unzip-5.50-13860U90_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

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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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