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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : screen
SUMMARY : Fix for screen vulnerability
DATE : 2004-01-20 08:53:00
ID : CLA-2004:809
RELEVANT
RELEASES : 8, 9

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DESCRIPTION
Screen[1] is a program which allows the use of several sessions
inside a single terminal.

Timo Sirainen reported[2] a buffer overflow vulnerability[3] in the
screen package which could be exploited by an attacker who is able to
send about 2Gb of data to the user's screen session.

Additionally, a fix for a potential problem with window sizes has
been incorporated in these updated packages.

Please note that screen is not installed setuid/setgid.

SOLUTION
It is recommended that all screen users upgrade their packages.


REFERENCES
1. http://www.gnu.org/software/screen/
2. http://marc.theaimsgroup.com/?l=bugtraq&m=106995837813873&w=2
3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0972

UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/SRPMS/screen-3.9.10-2U80_1cl.src.r
pm
ftp://atualizacoes.conectiva.com.br/8/RPMS/screen-3.9.10-2U80_1cl.i386.r
pm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/screen-3.9.13-24126U90_1cl.s
rc.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/screen-3.9.13-24126U90_1cl.i3
86.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 (c) 2004 Conectiva Inc.
http://www.conectiva.com

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