DESCRIPTION
The Linux kernel is responsible for handling the basic functions of
the GNU/Linux operating system.
A vulnerability in the do_brk() function allows local attackers to
obtain root privileges. Exploits for this vulnerability have already
been published.
Additionally, the following vulnerabilities have been fixed in a
previous kernel release which was available on the ftp server but
lacked an official announcement:
- CAN-2003-0550[2] and CAN-2003-0551[3]: fixes for the STP protocol
- CAN-2003-0501[4]: fix for /proc/information disclosure
- CAN-2003-0464[5]: fix for RPC code (affects only CL9)
- CAN-2003-0476[6]: fix for the execve system call which could allow
local users to gain access to restricted file descriptors
Specific for Conectiva Linux 8 (already fixed in a previous
announcement for CL9[7]):
- CAN-2003-0619[8]: fix for XDR code
- CAN-2003-0246[9]: ioperm fix
- CAN-2003-0248[10]: mxcsr fix
- CAN-2003-0364[11]: TCP/IP fragments denial of service
- CAN-2003-0244[12]: denial of service in routing table
- CAN-2003-0247[13]: denial of service in the TTY layer
Starting with this update, Conectiva Linux 9 has support for the PPTP
protocol, which also requires an update for the iptables package.
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[15]. More detailed instructions are also available in Portuguese
at our Moin[14] page.
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
- ------------------------------------------------------------------------
-
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
- ------------------------------------------------------------------------
-
Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com
Hash: SHA1
- ------------------------------------------------------------------------
--
CONECTIVA LINUX SECURITY ANNOUNCEMENT
- ------------------------------------------------------------------------
--
PACKAGE : kernel
SUMMARY : Fix for local do_brk() vulnerability
DATE : 2003-12-05 18:00:00
ID : CLA-2003:796
RELEVANT
RELEASES : 8, 9
- ------------------------------------------------------------------------
-
DESCRIPTION
The Linux kernel is responsible for handling the basic functions of
the GNU/Linux operating system.
A vulnerability in the do_brk() function allows local attackers to
obtain root privileges. Exploits for this vulnerability have already
been published.
Additionally, the following vulnerabilities have been fixed in a
previous kernel release which was available on the ftp server but
lacked an official announcement:
- CAN-2003-0550[2] and CAN-2003-0551[3]: fixes for the STP protocol
- CAN-2003-0501[4]: fix for /proc/information disclosure
- CAN-2003-0464[5]: fix for RPC code (affects only CL9)
- CAN-2003-0476[6]: fix for the execve system call which could allow
local users to gain access to restricted file descriptors
Specific for Conectiva Linux 8 (already fixed in a previous
announcement for CL9[7]):
- CAN-2003-0619[8]: fix for XDR code
- CAN-2003-0246[9]: ioperm fix
- CAN-2003-0248[10]: mxcsr fix
- CAN-2003-0364[11]: TCP/IP fragments denial of service
- CAN-2003-0244[12]: denial of service in routing table
- CAN-2003-0247[13]: denial of service in the TTY layer
Starting with this update, Conectiva Linux 9 has support for the PPTP
protocol, which also requires an update for the iptables package.
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[15]. More detailed instructions are also available in Portuguese
at our Moin[14] page.
REFERENCES
1.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0961
2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0550
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0551
4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0501
5.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0464
6.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0476
7.http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000
701&idioma=en
8.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0619
9.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0246
10.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0248
11.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0364
12.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0244
13.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0247
14.https://moin.conectiva.com.br/UpdatingKernelPackages
15.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_18cl.src.
rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/devfsd-2.4.19-1U80_18cl.i386.
rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_18cl.i386.
rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_18cl.i586.
rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-2.4.19-1U80_18cl.i686.
rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-BOOT-2.4.19-1U80_18cl.
i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-doc-2.4.19-1U80_18cl.i
386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-enterprise-2.4.19-1U80
_18cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-headers-2.4.19-1U80_18
cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-rbc-2.4.19-1U80_18cl.i
386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_18cl.i
386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_18cl.i
586.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-smp-2.4.19-1U80_18cl.i
686.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/kernel-source-2.4.19-1U80_18c
l.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/iptables-1.2.9-26694U90_1cl.
src.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/kernel24-2.4.21-31301U90_11c
l.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/devfsd-2.4.21-31301U90_11cl.i
386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/iptables-1.2.9-26694U90_1cl.i
386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_11cl
.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_11cl
.i586.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_11cl
.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-BOOT-2.4.21-31301U90
_11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-doc-2.4.21-31301U90_
11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31
301U90_11cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-headers-2.4.21-31301
U90_11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-rbc-2.4.21-31301U90_
11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_
11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_
11cl.i586.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_
11cl.i686.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-source-2.4.21-31301U
90_11cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_11cl
.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31
301U90_11cl.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_
11cl.athlon.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-2.4.21-31301U90_11cl
.pentium4.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-enterprise-2.4.21-31
301U90_11cl.pentium4.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/kernel24-smp-2.4.21-31301U90_
11cl.pentium4.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
- ------------------------------------------------------------------------
-
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
- ------------------------------------------------------------------------
-
Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com
- ------------------------------------------------------------------------
-
subscribe: conectiva-updates-subscribe (at) papaleguas.conectiva.com (dot) br [email concealed]
unsubscribe: conectiva-updates-unsubscribe (at) papaleguas.conectiva.com (dot) br [email concealed]
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