FLSA-2004:1888: Updated mod_ssl package fixes Apache security vulnerabilities
Posted on: 10/13/2004 06:38 PM

An updated mod_ssl packages ia vailable for Red Hat Linux 7.3

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Fedora Legacy Update Advisory

Synopsis: Updated mod_ssl package fixes Apache security
vulnerabilities
Advisory ID: FLSA:1888
Issue date: 2004-10-13
Product: Red Hat Linux
Keywords: Bugfix
Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1888
CVE Names: CAN-2004-0488 CAN-2004-0700
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1. Topic:

Updated mod_ssl packages that fix minor security issues in the Apache Web server are now available.

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

2. Relevant releases/architectures:

Red Hat Linux 7.3 - i386

3. Problem description:

A stack buffer overflow was discovered in mod_ssl which can be triggered if using the FakeBasicAuth option. If mod_ssl is sent a client certificate with a subject DN field longer than 6000 characters, a stack overflow can occur if FakeBasicAuth has been enabled. In order to exploit this issue the carefully crafted malicious certificate would have to be signed by a Certificate Authority which mod_ssl is configured to trust. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0488 to this issue.

A format string issue was discovered in mod_ssl for Apache 1.3 which can be triggered if mod_ssl is configured to allow a client to proxy to remote SSL sites. In order to exploit this issue, a user who is authorized to use Apache as a proxy would have to attempt to connect to a carefully crafted hostname via SSL. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0700 to this issue.

All users of the Apache HTTP Server are advised to upgrade to these erratum packages, which contain a backported fix and are not vulnerable to these issues.

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 yum and apt. Many people find this an easier way to apply updates. To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www fedoralegacy.org/docs for directions on how to configure yum and apt-get.

5. Bug IDs fixed:

http://bugzilla.fedora.us - bug #1708
http://bugzilla.fedora.us - bug #1888

6. RPMs required:

Red Hat Linux 7.3:

SRPM:
http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/mod_ssl-2.8.12-6.
legacy.src.rpm

i386:
http://download.fedoralegacy.org/redhat/7.3/updates/i386/mod_ssl-2.8.12-6.l
egacy.i386.rpm

7. Verification:

SHA1 sum Package Name
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211714e3a8faab1152e76471f1085f3d8ef30400
7.3/updates/i386/mod_ssl-2.8.12-6.legacy.i386.rpm
027bf3500924d4bb58bd8bb0ed452420a0e134bc
7.3/updates/SRPMS/mod_ssl-2.8.12-6.legacy.src.rpm

These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php

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 sha1sum with the following command:

sha1sum filename

8. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0488
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0700

9. Contact:

The Fedora Legacy security contact is secnotice@fedoralegacy.org. More project details at http://www.fedoralegacy.org


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