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[CLA-2004:856] Conectiva Security Announcement - libpng
From: Conectiva Updates <secure () conectiva com br>
Date: Fri, 6 Aug 2004 09:54:05 -0300

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : libpng
SUMMARY   : Several vulnerabilities in libpng
DATE      : 2004-08-06 09:53:00
ID        : CLA-2004:856
RELEVANT
RELEASES  : 8, 9, 10

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DESCRIPTION
 libpng[1] is a library for manipulating PNG image format files.
 
 Chris Evans found several vulnerabilities in unpatched libpng
 versions pior to 1.0.16rc1 and 1.2.6rc1:
 
 1. Buffer overflow[2] vulnerabilities which could allow a remote
 attacker to execute arbitrary code via a malicious PNG image.
 
 2. NULL-pointer reference[3] vulnerabilities that could allow a
 remote attacker to cause an application to crash via a malicious PNG
 image.
 
 3. Integer overflow[4] vulnerabilities that could allow a remote
 attacker to cause an application to crash via a malicious PNG image.


SOLUTION
 It is recommended that all Conectiva Linux users upgrade their
 packages.
 
 IMPORTANT: all applications linked against libpng must be restarted
 after the upgrade in order to close the vulnerabilities.
 
 
 REFERENCES
 1.http://www.libpng.org/pub/png/libpng.html
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0597
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0598
 4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0599


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libpng-1.0.15-42714U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libpng3-1.2.5-57535U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libpng-devel-1.2.5-57535U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libpng-devel-static-1.2.5-57535U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libpng-doc-1.2.5-57535U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libpng10-1.0.15-42714U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libpng3-1.2.5-57535U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libpng-1.0.14-1U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libpng3-1.2.5-1U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-1.0.14-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-devel-1.2.5-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-devel-static-1.2.5-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-doc-1.2.5-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng3-1.2.5-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libpng-1.0.15-22380U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libpng3-1.2.5-22618U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libpng-1.0.15-22380U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libpng-devel-1.2.5-22618U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libpng-devel-static-1.2.5-22618U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libpng-doc-1.2.5-22618U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libpng3-1.2.5-22618U90_1cl.i386.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 regarding 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) 2004 Conectiva Inc.
http://www.conectiva.com

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