Conectiva Information for VU#757612

Apache Portable Runtime contains heap buffer overflow in apr_psprintf()

Status

Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Vendor References

None

Addendum

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE   : apache
SUMMARY   : Apache 2 vulnerability
DATE      : 2003-06-16 18:27:00
ID        : CLA-2003:661
RELEVANT
RELEASES  : 9

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DESCRIPTION
Apache[1] is the most popular webserver in use today.


This update addresses two security vulnerabilities which have been
fixed in the recently released[2] 2.0.46 version:


1) CAN-2003-0245[3]
iDefense published[5] an advisory about a vulnerability in the APR
library used by Apache 2. This library contains a vulnerability in
the apr_psprintf() function which could be used to make apache
reference invalid memory.


The most immediate impact of this vulnerability is a Denial of
Service condition. Arbitrary command execution remains a possibility,
but is deemed to be difficult to achieve outside a controlled
environment.


The packages provided with this update contain a fix for this
vulnerability.


2) CAN-2003-0189[4]
A problem with the build configuration scripts caused the Apache
basic authentication module to not be thread-safe. Systems running a
threaded server would then be vulnerable to a Denial of Service
condition when authenticating users using this module. Apache in
Conectiva Linux 9 is *not* vulnerable to this issue because it is not
built with threads support. However, the packages available through
this update have been patched to fix this problem to allow users to
recompile Apache with threads support in the event they choose to do
so.



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.apache.org/dist/httpd/Announcement2.html
3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0245
4. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0189
5. http://www.idefense.com/advisory/05.30.03.txt



UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/9/SRPMS/apache-2.0.45-28790U90_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-devel-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-doc-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/apache-htpasswd-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr-devel-static-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libapr0-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/mod_auth_ldap-2.0.45-28790U90_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/mod_dav-2.0.45-28790U90_2cl.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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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
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