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Red Hat Security Advisory

Synopsis:	Updated apache packages fix minor security vulnerability
Advisory ID:	RHSA-2003:405-00
Issue date:	2003-12-18
Updated on:	2003-12-18
Product:	Red Hat Linux
Keywords:	Apache httpd ASF
Cross references:
Obsoletes:
CVE Names:	CAN-2003-0542

Topic:

Updated Apache packages that fix a minor security issue are now available for Red Hat Linux 7.1, 7.2, and 7.3.

2. Relevant releases/architectures:

Red Hat Linux 7.1 - i386
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386

3. Problem description:

The Apache HTTP server is a powerful, full-featured, efficient, and freely-available Web server.

An issue in the handling of regular expressions from configuration files was discovered in releases of the Apache HTTP Server version 1.3 prior to 1.3.29. To exploit this issue an attacker would need to have the ability to write to Apache configuration files such as .htaccess or httpd.conf. A carefully-crafted configuration file can cause an exploitable buffer overflow and would allow the attacker to execute arbitrary code in the context of the server (in default configurations as the 'apache' user). The Common Vulnerabilities and Exposures project (cve.mitre.org/) has assigned the name CAN-2003-0542 to this issue.

All users of the Apache HTTP Web Server are advised to upgrade to the applicable errata packages, which contain back-ported fixes correcting this issue.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory only contains the desired RPMs.

Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

108639 - CAN-2003-0542 Local buffer overflow in mod_alias, mod_rewrite

6. RPMs required:

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/apache-1.3.27-3.7.1.src.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/apache-1.3.27-3.7.1.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/apache-devel-1.3.27-3.7.1.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/apache-manual-1.3.27-3.7.1.i386.rpm

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/apache-1.3.27-3.7.2.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/apache-1.3.27-3.7.2.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/apache-devel-1.3.27-3.7.2.i386.rpm
ftp://updates.redhat.com/7.2/en/os/i386/apache-manual-1.3.27-3.7.2.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/apache-1.3.27-3.7.2.ia64.rpm
ftp://updates.redhat.com/7.2/en/os/ia64/apache-devel-1.3.27-3.7.2.ia64.rpm
ftp://updates.redhat.com/7.2/en/os/ia64/apache-manual-1.3.27-3.7.2.ia64.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/apache-1.3.27-4.src.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/apache-1.3.27-4.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/apache-devel-1.3.27-4.i386.rpm
ftp://updates.redhat.com/7.3/en/os/i386/apache-manual-1.3.27-4.i386.rpm

7. Verification:

MD5 sum Package Name

These packages are GPG signed by Red Hat for security. Our key is available from https://www.redhat.com/security/keys.html

You can verify each package with the following command:

rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command:

md5sum <filename>

8. References:

http://www.apacheweek.com/features/security-13.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0542

9. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.