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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : zlib
SUMMARY : gzprintf() buffer overflow
DATE : 2003-04-07 17:10:00
ID : CLA-2003:619
RELEVANT
RELEASES : 6.0, 7.0, 8
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DESCRIPTION
"zlib"[1] is a compression library used by several programs.
Richard Kettlewell discovered[1] a buffer overflow vulnerability[2]
in the gzprintf() function provided by zlib. If a program passes
unsafe data to this function (e.g. data from remote images or network
traffic), it is possible for a remote attacker to execute arbitrary
code or to cause a denial of service in such programs.
Although hundreds of programs are linked against zlib in Conectiva
Linux, the vulnerable function, gzprintf(), is rarely used, which
lessens the impact of this vulnerability.
The Common Vulnerabilities and Exposures (CVE) project has assigned
the name CAN-2003-0107 to this issue.
SOLUTION
All users should upgrade.
Please note that it is necessary to restart services which use the
library so that the new, fixed, version is used. A list of such
applications can be obtained after the upgrade with the following
command:
lsof | grep libz
The first column will contain the name of the application that needs
to be restarted. If there is any doubt about which application has to
be restarted or how to do it, we recommend a system reboot.
REFERENCES:
1.http://www.gzip.org/zlib/
2.http://online.securityfocus.com/archive/1/312869
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0107
UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/zlib-1.1.3-15U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/zlib-devel-1.1.3-15U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/zlib-devel-static-1.1.3-15U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/zlib-1.1.3-15U60_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/zlib-1.1.3-15U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/zlib-devel-1.1.3-15U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/zlib-devel-static-1.1.3-15U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/zlib-1.1.3-15U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/zlib-1.1.3-16U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/zlib-devel-1.1.3-16U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/zlib-devel-static-1.1.3-16U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/zlib-1.1.3-16U80_1cl.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 2003 (c) Conectiva Inc.
http://www.conectiva.com
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This archive was generated by hypermail 2b30 : Mon Apr 07 2003 - 13:41:25 PDT