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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...=CAN-2004-0597
3.http://cve.mitre.org/cgi-bin/cvename...=CAN-2004-0598
4.http://cve.mitre.org/cgi-bin/cvename...=CAN-2004-0599


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/...10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/...0_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/atual...#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/segur...ave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/segur...ica/?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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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papale...nectiva.com.br
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