====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: httpd security and enhancement update
Advisory ID:       RHSA-2010:0168-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2010:0168.html
Issue date:        2010-03-25
CVE Names:         CVE-2010-0408 CVE-2010-0434 
====================================================================
1. Summary:

Updated httpd packages that fix two security issues and add an enhancement
are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

The Apache HTTP Server is a popular web server.

It was discovered that mod_proxy_ajp incorrectly returned an "Internal
Server Error" response when processing certain malformed requests, which
caused the back-end server to be marked as failed in configurations where
mod_proxy is used in load balancer mode. A remote attacker could cause
mod_proxy to not send requests to back-end AJP (Apache JServ Protocol)
servers for the retry timeout period (60 seconds by default) by sending
specially-crafted requests. (CVE-2010-0408)

A use-after-free flaw was discovered in the way the Apache HTTP Server
handled request headers in subrequests. In configurations where subrequests
are used, a multithreaded MPM (Multi-Processing Module) could possibly leak
information from other requests in request replies. (CVE-2010-0434)

This update also adds the following enhancement:

* with the updated openssl packages from RHSA-2010:0162 installed, mod_ssl
will refuse to renegotiate a TLS/SSL connection with an unpatched client
that does not support RFC 5746. This update adds the
"SSLInsecureRenegotiation" configuration directive. If this directive is
enabled, mod_ssl will renegotiate insecurely with unpatched clients.
(BZ#567980)

Refer to the following Red Hat Knowledgebase article for more details about
the changed mod_ssl behavior: 
All httpd users should upgrade to these updated packages, which contain
backported patches to correct these issues and add this enhancement. After
installing the updated packages, the httpd daemon must be restarted for the
update to take effect.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at

5. Bugs fixed (http://bugzilla.redhat.com/):

567980 - [RFE] mod_ssl: Add SSLInsecureRenegotiation directive [rhel-5]
569905 - CVE-2010-0408 httpd: mod_proxy_ajp remote temporary DoS
570171 - CVE-2010-0434 httpd: request header information leak

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:

i386:
httpd-2.2.3-31.el5_4.4.i386.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.i386.rpm
mod_ssl-2.2.3-31.el5_4.4.i386.rpm

x86_64:
httpd-2.2.3-31.el5_4.4.x86_64.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.x86_64.rpm
mod_ssl-2.2.3-31.el5_4.4.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:

i386:
httpd-debuginfo-2.2.3-31.el5_4.4.i386.rpm
httpd-devel-2.2.3-31.el5_4.4.i386.rpm
httpd-manual-2.2.3-31.el5_4.4.i386.rpm

x86_64:
httpd-debuginfo-2.2.3-31.el5_4.4.i386.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.x86_64.rpm
httpd-devel-2.2.3-31.el5_4.4.i386.rpm
httpd-devel-2.2.3-31.el5_4.4.x86_64.rpm
httpd-manual-2.2.3-31.el5_4.4.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:

i386:
httpd-2.2.3-31.el5_4.4.i386.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.i386.rpm
httpd-devel-2.2.3-31.el5_4.4.i386.rpm
httpd-manual-2.2.3-31.el5_4.4.i386.rpm
mod_ssl-2.2.3-31.el5_4.4.i386.rpm

ia64:
httpd-2.2.3-31.el5_4.4.ia64.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.ia64.rpm
httpd-devel-2.2.3-31.el5_4.4.ia64.rpm
httpd-manual-2.2.3-31.el5_4.4.ia64.rpm
mod_ssl-2.2.3-31.el5_4.4.ia64.rpm

ppc:
httpd-2.2.3-31.el5_4.4.ppc.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.ppc.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.ppc64.rpm
httpd-devel-2.2.3-31.el5_4.4.ppc.rpm
httpd-devel-2.2.3-31.el5_4.4.ppc64.rpm
httpd-manual-2.2.3-31.el5_4.4.ppc.rpm
mod_ssl-2.2.3-31.el5_4.4.ppc.rpm

s390x:
httpd-2.2.3-31.el5_4.4.s390x.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.s390.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.s390x.rpm
httpd-devel-2.2.3-31.el5_4.4.s390.rpm
httpd-devel-2.2.3-31.el5_4.4.s390x.rpm
httpd-manual-2.2.3-31.el5_4.4.s390x.rpm
mod_ssl-2.2.3-31.el5_4.4.s390x.rpm

x86_64:
httpd-2.2.3-31.el5_4.4.x86_64.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.i386.rpm
httpd-debuginfo-2.2.3-31.el5_4.4.x86_64.rpm
httpd-devel-2.2.3-31.el5_4.4.i386.rpm
httpd-devel-2.2.3-31.el5_4.4.x86_64.rpm
httpd-manual-2.2.3-31.el5_4.4.x86_64.rpm
mod_ssl-2.2.3-31.el5_4.4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-0408.html
https://www.redhat.com/security/data/cve/CVE-2010-0434.html
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2010 Red Hat, Inc.