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Security Advisory apache, mod_ssl security update

Advisory: RHSA-2004:245-14
Type: Security Advisory
Severity: Moderate
Issued on: 2004-06-14
Last updated on: 2004-06-14
Affected Products: Red Hat Enterprise Linux AS (v. 2.1)
Red Hat Enterprise Linux ES (v. 2.1)
Red Hat Enterprise Linux WS (v. 2.1)
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor
CVEs (cve.mitre.org): CVE-2004-0488
CVE-2004-0492

Details

Updated httpd and mod_ssl packages that fix minor security issues in
the Apache Web server are now available for Red Hat Enterprise Linux 2.1.

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

A buffer overflow was found in the Apache proxy module, mod_proxy, which
can be triggered by receiving an invalid Content-Length header. In order
to exploit this issue, an attacker would need an Apache installation
that was configured as a proxy to connect to a malicious site. This would
cause the Apache child processing the request to crash. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0492 to this issue.

On Red Hat Enterprise Linux platforms Red Hat believes this issue cannot
lead to remote code execution. This issue also does not represent a Denial
of Service attack as requests will continue to be handled by other Apache
child processes.

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.

This update also fixes a DNS handling bug in mod_proxy.

The mod_auth_digest module is now included in the Apache package and should
be used instead of mod_digest for sites requiring Digest authentication.

Red Hat Enterprise Linux 2.1 users of the Apache HTTP Server should upgrade
to these erratum packages, which contains Apache version 1.3.27 with
backported patches correcting these issues.


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

Updated packages

Red Hat Enterprise Linux AS (v. 2.1)

SRPMS:
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
 
IA-32:
apache-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 6aaeefcc251c69d6e0f5b2f65a3d8d8b
apache-devel-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 51915eba50827a2c433cfbdc6b8cbba1
apache-manual-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 4cae1b4448aa91f86b151bfc4a1131bf
mod_ssl-2.8.12-4.i386.rpm
File outdated by:  RHSA-2005:773
    MD5: 72981573499af5b48f18bbf4a84db467
 
IA-64:
apache-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: fd3824f33645c995f4051ea1c5443af8
apache-devel-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: 35fc4104a5c5b2980faff3beda26b020
apache-manual-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: 2c5dd25e15b85b04858337f528ce3188
mod_ssl-2.8.12-4.ia64.rpm
File outdated by:  RHSA-2005:773
    MD5: 8cd07fc8dfb9e0b3869d1154581d05f3
 
Red Hat Enterprise Linux ES (v. 2.1)

SRPMS:
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
 
IA-32:
apache-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 6aaeefcc251c69d6e0f5b2f65a3d8d8b
apache-devel-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 51915eba50827a2c433cfbdc6b8cbba1
apache-manual-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 4cae1b4448aa91f86b151bfc4a1131bf
mod_ssl-2.8.12-4.i386.rpm
File outdated by:  RHSA-2005:773
    MD5: 72981573499af5b48f18bbf4a84db467
 
Red Hat Enterprise Linux WS (v. 2.1)

SRPMS:
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
 
IA-32:
apache-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 6aaeefcc251c69d6e0f5b2f65a3d8d8b
apache-devel-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 51915eba50827a2c433cfbdc6b8cbba1
apache-manual-1.3.27-8.ent.i386.rpm
File outdated by:  RHSA-2008:0004
    MD5: 4cae1b4448aa91f86b151bfc4a1131bf
mod_ssl-2.8.12-4.i386.rpm
File outdated by:  RHSA-2005:773
    MD5: 72981573499af5b48f18bbf4a84db467
 
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor

SRPMS:
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
apache-1.3.27-8.ent.src.rpm
File outdated by:  RHSA-2008:0004
    MD5: 907752ff24d8cad085b50668746b6126
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
mod_ssl-2.8.12-4.src.rpm
File outdated by:  RHSA-2005:773
    MD5: d601db52fb2edfbe69dcf3bc953929b8
 
IA-64:
apache-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: fd3824f33645c995f4051ea1c5443af8
apache-devel-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: 35fc4104a5c5b2980faff3beda26b020
apache-manual-1.3.27-8.ent.ia64.rpm
File outdated by:  RHSA-2008:0004
    MD5: 2c5dd25e15b85b04858337f528ce3188
mod_ssl-2.8.12-4.ia64.rpm
File outdated by:  RHSA-2005:773
    MD5: 8cd07fc8dfb9e0b3869d1154581d05f3
 

Bugs fixed (see bugzilla for more information)

122637 - mod_proxy does reverse DNS lookups (AS2.1)
125704 - CAN-2004-0492 mod_proxy buffer overflow


References


Keywords

Apache, ASF, FakeBasicAuth, httpd, mod_proxy, mod_ssl


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The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/