Conectiva Linux Advisories: cvs, libpng, dhcp

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : cvs
SUMMARY   : Update: cvs remote double free() vulnerability
DATE      : 2003-01-23 10:54:00
ID        : CLA-2003:561
RELEVANT
RELEASES  : 6.0, 7.0, 8

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DESCRIPTION
 CVS is a version control system largely used in software projects.
 
 During a code audit, Stefan Esser discovered a double free()
 vulnerability[2][3] in the CVS code. This vulnerability can be
 exploited by remote users, authenticated or anonymous, to execute
 arbitrary commands on the server.
 
 Please note that users with write access to CVS (the so called
 "commiters") usually already have shell access on the server, or can
 easily get shell access as has already been discussed elsewhere[4].
 
 Besides fixing the double free vulnerability, the new packages
 provided with this update now have the Checkin-prog and Update-prog
 commands disabled.
 
 
 UPDATE
 The previous CVS update (CLSA-2003:560), while indeed fixing the
 security vulnerability, introduced problems which prevented it from
 being used due to the way the Checkin-prog and Update-prog commands
 where disabled. This has now been fixed.


SOLUTION
 It is recommended that all CVS administrators upgrade their packages
 immediately.
 
 
 REFERENCES
 1. http://www.cvshome.org/
 2. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0015
 3. http://security.e-matters.de/advisories/012003.html
 4. http://online.securityfocus.com/archive/1/72584
 5. http://bugzilla.conectiva.com/show_bug.cgi?id=7507


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/cvs-1.10.8-5U60_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/cvs-1.10.8-5U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/cvs-doc-1.10.8-5U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/cvs-1.11-7U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/cvs-1.11-7U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/cvs-doc-1.11-7U70_3cl.i386.r
ftp://atualizacoes.conectiva.com.br/8/SRPMS/cvs-1.11-9U80_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/cvs-1.11-9U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/cvs-doc-1.11-9U80_3cl.i386.rpm


ADDITIONAL INSTRUCTIONS
 Users of Conectiva Linux version 6.0 or higher may use apt to perform 
 upgrades of RPM packages:

 - 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


- -------------------------------------------------------------------------
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

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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : libpng
SUMMARY   : Buffer overflow vulnerability
DATE      : 2003-01-23 18:17:00
ID        : CLA-2003:564
RELEVANT
RELEASES  : 6.0, 7.0, 8

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DESCRIPTION
 libpng is a library used to create and manipulate PNG (Portable
 Network Graphics) image files. 
 
 Glenn Randers-Pehrson discovered a buffer overflow vulnerability in
 unpatched libpng versions prior to 1.0.15 and 1.2.5(*) (inclusive).
 
 Programs such as web browsers and various others common applications
 make use of libpng. An attacker could exploit this vulnerability to
 remotely run arbitrary code or crash such applications by using a
 specially crafted png image.
 
 This update provides patched versions of libpng with fixes for this
 vulnerability.
 
 * The libpng-1.2.X series is available only in Conectiva Linux 8 in
 the libpng3 package.


SOLUTION
 All users should upgrade.
 
 Please note that in order to complete the upgrade process, you must
 restart all running aplications that are linked against libpng after
 the new packages installation. You can see a list of such
 applications using the lsof utility, as seen below:
 
 # lsof | grep libpng
 
 
 REFERENCES:
 1.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1363


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpng-1.0.14-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/libpng-devel-1.0.14-1U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/libpng-1.0.14-1U60_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpng-1.0.14-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpng-devel-1.0.14-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpng-devel-static-1.0.14-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/libpng-doc-1.0.14-1U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/libpng-1.0.14-1U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-1.0.14-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng3-1.2.4-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-devel-1.2.4-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-devel-static-1.2.4-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libpng-doc-1.2.4-1U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libpng-1.0.14-1U80_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libpng3-1.2.4-1U80_2cl.src.rpm


ADDITIONAL INSTRUCTIONS
 Users of Conectiva Linux version 6.0 or higher may use apt to perform 
 upgrades of RPM packages:

 - 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


- -------------------------------------------------------------------------
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

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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br


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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : dhcp
SUMMARY   : Remote Vulnerability
DATE      : 2003-01-23 16:54:00
ID        : CLA-2003:562
RELEVANT
RELEASES  : 8

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DESCRIPTION
 The package "dhcp" provides a Dynamic Host Configuration Protocol[1]
 server developed by ISC (ISC DHCPD).
 
 During an internal source code audit, the ISC developers found
 several stack-based buffer overflow vulnerabilities[2,3] in the error
 handling routines of the minires library. This library is used by the
 NSUPDATE feature, which is present in dhcp versions newer than 3.0
 and allows the DHCP server to dynamically update DNS server records.
 
 A remote attacker which can send messages directly to the DHCP server
 can exploit these vulnerabilities to execute arbitrary code in the
 server context with the privileges of the root user.
 
 The packages provided with this announcement fix these
 vulnerabilities with a patch from ISC. Please note that Conectiva
 Linux versions prior to 8 do not ship dhcp 3.0 and therefore are not
 vulnerable to this problem.


SOLUTION
 All dhcp users should upgrade immediately. After upgrading the
 packages, please restart the dhcpd service if it is already running.
 This can be done with the command below (as the root user):
 
 # service dhcpd restart
 
 
 REFERENCES:
 1.http://www.ietf.org/rfc/rfc2131.txt
 2.http://www.cert.org/advisories/CA-2003-01.html
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0026
 4.http://www.isc.org/products/DHCP/


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/RPMS/dhcp-3.0-3U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/dhcp-doc-3.0-3U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/dhcp-3.0-3U80_2cl.src.rpm


ADDITIONAL INSTRUCTIONS
 Users of Conectiva Linux version 6.0 or higher may use apt to perform 
 upgrades of RPM packages:

 - 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


- -------------------------------------------------------------------------
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

- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br