Conectiva Linux Advisories: apache, sendmail
Apr 30, 2003, 20:28 (0 Talkback[s])
- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT
- --------------------------------------------------------------------------
PACKAGE : apache
SUMMARY : Denial of service vulnerability
DATE : 2003-04-30 14:48:00
ID : CLA-2003:632
RELEVANT
RELEASES : 9
- -------------------------------------------------------------------------
DESCRIPTION
Apache[1] is the most popular webserver in use today.
This update fixes two security vulnerabilities:
1. Denial of service (CAN-2003-0132)[3]
David Endler from iDefense reported[2] a denial of service condition
that affects the apache 2.0 branch which affects all unpatched
servers up to and including version 2.0.44.
There is a memory leak in these apache versions which can be remotely
triggered by sending large chunks of consecutive linefeed characters.
Each linefeed will cause the server to allocate 80 bytes of memory.
A remote attacker can keep sending these simple requests until the
server's memory is exhausted.
2. File descriptor leak[5]
Christian Kratzer and Bjoern A. Zeeb identified several file
descriptor leaks to child processes, such as CGI scripts, which could
consitute a security threat on servers that run untrusted CGI
scripts.
The Apache HTTP Server Project released[4] Apache version 2.0.45 to
address these issues, and this is the version provided via this
update.
SOLUTION
It is recommended that all Apache users upgrade their packages.
IMPORTANT: it is necessary to manually restart the httpd server after
upgrading the packages. In order to do this, execute the following as
root:
service apache stop
(wait a few seconds and check with "ps ax|grep httpd" if there are
any httpd processes running. On a busy webserver this could take a
little longer)
service apache start
REFERENCES
1. http://httpd.apache.org/
2. http://www.idefense.com/advisory/04.08.03.txt
3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0132
4. http://www.apache.org/dist/httpd/Announcement2.html
5. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=17206
UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/9/SRPMS/apache-2.0.45-28790U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-devel-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-doc-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-htpasswd-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-static-2.0.45-28790U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr0-2.0.45-28790U90_1cl.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
- -------------------------------------------------------------------------
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
- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT
- --------------------------------------------------------------------------
PACKAGE : sendmail
SUMMARY : Buffer overflow vulnerability
DATE : 2003-04-04 15:10:00
REVISED : 2003-04-30 14:50:00
ID : CLA-2003:614
RELEVANT
RELEASES : 6.0, 7.0, 8, 9
- -------------------------------------------------------------------------
DESCRIPTION
NOTE: this is a revision of the CLA-2003:614 advisory. The only change
is the inclusion of this note and packages for Conectiva Linux 9 which
was not addressed before.
Sendmail[1] is a widely used Mail Transfer Agent (MTA).
Michal Zalewski reported[6] a remote vulnerability[5] in sendmail
versions 8.12.8 and below. The vulnerability lies in the address
parser which performs insufficient bounds checking in certain
conditions due to a char to int conversion.
It is believed to be possible for remote attackers to cause a Denial
of Service condition and to even execute arbitrary commands with the
same permissions under which the sendmail daemon runs, which is
root.
The sendmail authors have released a new version[2], 8.12.9, which
fixes this vulnerability. They have also made available patches[3]
for older versions, which the packages provided via this announcement
contain.
Starting with Conectiva Linux 7.0, sendmail is no longer the default
mail server and has been replaced with Postfix. But sendmail is still
shipped in all Conectiva Linux versions.
SOLUTION
All sendmail users should upgrade immediately. If the service is
already active, it should be restarted after the upgrade in order to
close the vulnerability. To do so, execute the following command as
root:
/sbin/service sendmail restart
REFERENCES
1. http://www.sendmail.org/
2. http://www.sendmail.org/8.12.9.html
3. http://www.sendmail.org/patchps.html
4. http://www.cert.org/advisories/CA-2003-12.html
5. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0161
6. http://marc.theaimsgroup.com/?l=bugtraq&m=104897487512238&w=2
UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sendmail-8.11.6-1U60_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-cf-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-doc-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sendmail-8.11.6-1U70_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-cf-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-doc-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/sendmail-8.11.6-2U80_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-8.11.6-2U80_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-cf-8.11.6-2U80_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-doc-8.11.6-2U80_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/sendmail-8.12.5-26986U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-8.12.5-26986U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-cf-8.12.5-26986U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/sendmail-doc-8.12.5-26986U90_1cl.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
- -------------------------------------------------------------------------
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 2003 (c) Conectiva Inc.
http://www.conectiva.com
