[CLA-2004:869] Conectiva Security Announcement - kernel

From: Conectiva Updates (secure_at_conectiva.com.br)
Date: 09/27/04

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Date: Mon, 27 Sep 2004 11:27:11 -0300
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com, linsec@lists.seifried.org

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : kernel
SUMMARY : Fix for kernel vulnerability
DATE : 2004-09-27 11:26:00
ID : CLA-2004:869
RELEVANT
RELEASES : 9

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DESCRIPTION
The Linux kernel is responsible for handling the basic functions of
the GNU/Linux operating system.

This announcement fixes a missing[1] Discretionary Access Control
(DAC) check in the chown system call that allowed a local user to
change the group ownership of arbitrary files to a group that he or
she belongs to, leading to a privileges escalation vulnerability.

SOLUTION
It is recommended that all Conectiva Linux users upgrade the kernel
package.

IMPORTANT: exercise caution and preparation when upgrading the
kernel, since it will require a reboot after the new packages are
installed. In particular, Conectiva Linux 9 will most likely require
an initrd file (which is automatically created in the /boot directory
after the new packages are installed). Generic kernel update
instructions can be obtained in the manuals and in our updates
page[2]. More detailed instructions are also available in Portuguese
at our Moin[3] page.

REFERENCES
1.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0497
2.https://moin.conectiva.com.br/UpdatingKernelPackages
3.http://www.conectiva.com.br/suporte/pr/sistema.kernel.atualizar.html

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

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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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