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Conectiva Linux Advisory: zlib

Oct 26, 2004, 16:44 (0 Talkback[s])

CONECTIVA LINUX SECURITY ANNOUNCEMENT

PACKAGE : zlib
SUMMARY : Fix for denial of service vulnerabilities
DATE : 2004-10-25 15:45:00
ID : CLA-2004:878
RELEVANT RELEASES : 10


DESCRIPTION
"zlib"[1] is a compression library used by several programs.

This announcement improves the correction adopted by the previous one[2] by adding a single missing hunk to the correction's patch.

Due to a Debian bug report[3], a denial of service vulnerability[4] was discovered in the zlib compression library versions 1.2.x, in the inflate() and inflateBack() functions. An attacker could exploit this vulnerability to launch a denial of service attack on any application using the zlib library. Older versions of zlib are not affected.

SOLUTION
It is recommended that all Conectiva Linux users upgrade their packages.

IMPORTANT: all applications linked against zlib must be restarted after the upgrade in order to close the vulnerabilities.

REFERENCES
1.http://www.gzip.org/zlib/
2.http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000865&idioma=en
3.http://bugs.debian.org/252253
4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0797

UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libz1-1.2.1-47972U10_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libz1-1.2.1-47972U10_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libz-devel-1.2.1-47972U10_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libz-devel-static-1.2.1-47972U10_2cl.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


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
All our advisories and generic update instructions can be viewed at http://distro.conectiva.com.br/atualizacoes/?idioma=en
Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com