Conectiva Information for VU#490620

Linux kernel do_mremap() call creates virtual memory area of 0 bytes in length

Status

Affected

Vendor Statement

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE   : kernel
SUMMARY   : Fix for two vulnerabilities
DATE      : 2004-01-05 13:46:00
ID        : CLA-2004:799
RELEVANT
RELEASES  : 8, 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 two local vulnerabilities in the kernel
package:

1) mremap() local vulnerability (CAN-2003-0985[2])
Paul Starzetz <ihaquer@isec.pl> from iSEC Security Research
reported[1] another vulnerability in the Linux memory management code
which can be used by local attackers to obtain root privileges or
cause a denial of service condition (DoS).

2) Information leak in RTC code (CAN-2003-0984[3])
Russell King <rmk@arm.linux.org.uk> reported that real time clock
(RTC) routines in Linux kernel 2.4.23 and earlier do not properly
initialize their structures, which could leak kernel data to user
space.


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 faq page[4].


REFERENCES
1.http://isec.pl/vulnerabilities/isec-0013-mremap.txt
2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0985
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0984
4.http://www.conectiva.com.br/suporte/pr/sistema.kernel.atualizar.html


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/SRPMS/kernel-2.4.19-1U80_20cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/devfsd-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_20cl.i586.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_20cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-BOOT-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-doc-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-enterprise-2.4.19-1U80_20cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-headers-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-rbc-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_20cl.i586.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_20cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-source-2.4.19-1U80_20cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/kernel24-2.4.21-31301U90_13cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/devfsd-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_13cl.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_13cl.i586.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_13cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_13cl.pentium4.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-BOOT-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-doc-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31301U90_13cl.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31301U90_13cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31301U90_13cl.pentium4.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-rbc-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-headers-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_13cl.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_13cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_13cl.i586.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_13cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_13cl.pentium4.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-source-2.4.21-31301U90_13cl.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 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) 2003 Conectiva Inc.
http://www.conectiva.com

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

The CERT/CC has no additional comments at this time.

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