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

Synopsis:          Moderate: httpd security update
Advisory ID:       RHSA-2012:0128-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-0128.html
Issue date:        2012-02-13
CVE Names:         CVE-2011-3607 CVE-2011-3639 CVE-2011-4317 
                   CVE-2012-0031 CVE-2012-0053 
=====================================================================

1. Summary:

Updated httpd packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6.

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:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64

3. Description:

The Apache HTTP Server is a popular web server.

It was discovered that the fix for CVE-2011-3368 (released via
RHSA-2011:1391) did not completely address the problem. An attacker could
bypass the fix and make a reverse proxy connect to an arbitrary server not
directly accessible to the attacker by sending an HTTP version 0.9 request,
or by using a specially-crafted URI. (CVE-2011-3639, CVE-2011-4317)

The httpd server included the full HTTP header line in the default error
page generated when receiving an excessively long or malformed header.
Malicious JavaScript running in the server's domain context could use this
flaw to gain access to httpOnly cookies. (CVE-2012-0053)

An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the way httpd performed substitutions in regular expressions. An
attacker able to set certain httpd settings, such as a user permitted to
override the httpd configuration for a specific directory using a
".htaccess" file, could use this flaw to crash the httpd child process or,
possibly, execute arbitrary code with the privileges of the "apache" user.
(CVE-2011-3607)

A flaw was found in the way httpd handled child process status information.
A malicious program running with httpd child process privileges (such as a
PHP or CGI script) could use this flaw to cause the parent httpd process to
crash during httpd service shutdown. (CVE-2012-0031)

All httpd users should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the httpd daemon will be restarted automatically.

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
https://access.redhat.com/kb/docs/DOC-11259

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

752080 - CVE-2011-3639 httpd: http 0.9 request bypass of the reverse proxy vulnerability CVE-2011-3368 fix
756483 - CVE-2011-4317 httpd: uri scheme bypass of the reverse proxy vulnerability CVE-2011-3368 fix
769844 - CVE-2011-3607 httpd: ap_pregsub Integer overflow to buffer overflow
773744 - CVE-2012-0031 httpd: possible crash on shutdown due to flaw in scoreboard handling
785069 - CVE-2012-0053 httpd: cookie exposure due to error responses

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

i386:
httpd-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-tools-2.2.15-15.el6_2.1.i686.rpm

x86_64:
httpd-2.2.15-15.el6_2.1.x86_64.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

i386:
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
mod_ssl-2.2.15-15.el6_2.1.i686.rpm

noarch:
httpd-manual-2.2.15-15.el6_2.1.noarch.rpm

x86_64:
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm
mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

x86_64:
httpd-2.2.15-15.el6_2.1.x86_64.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

noarch:
httpd-manual-2.2.15-15.el6_2.1.noarch.rpm

x86_64:
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm
mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

i386:
httpd-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-tools-2.2.15-15.el6_2.1.i686.rpm
mod_ssl-2.2.15-15.el6_2.1.i686.rpm

noarch:
httpd-manual-2.2.15-15.el6_2.1.noarch.rpm

ppc64:
httpd-2.2.15-15.el6_2.1.ppc64.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.ppc.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.ppc64.rpm
httpd-devel-2.2.15-15.el6_2.1.ppc.rpm
httpd-devel-2.2.15-15.el6_2.1.ppc64.rpm
httpd-tools-2.2.15-15.el6_2.1.ppc64.rpm
mod_ssl-2.2.15-15.el6_2.1.ppc64.rpm

s390x:
httpd-2.2.15-15.el6_2.1.s390x.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.s390.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.s390x.rpm
httpd-devel-2.2.15-15.el6_2.1.s390.rpm
httpd-devel-2.2.15-15.el6_2.1.s390x.rpm
httpd-tools-2.2.15-15.el6_2.1.s390x.rpm
mod_ssl-2.2.15-15.el6_2.1.s390x.rpm

x86_64:
httpd-2.2.15-15.el6_2.1.x86_64.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm
httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm
mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm

i386:
httpd-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-tools-2.2.15-15.el6_2.1.i686.rpm
mod_ssl-2.2.15-15.el6_2.1.i686.rpm

noarch:
httpd-manual-2.2.15-15.el6_2.1.noarch.rpm

x86_64:
httpd-2.2.15-15.el6_2.1.x86_64.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm
httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm
httpd-devel-2.2.15-15.el6_2.1.i686.rpm
httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm
httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm
mod_ssl-2.2.15-15.el6_2.1.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3607.html
https://www.redhat.com/security/data/cve/CVE-2011-3639.html
https://www.redhat.com/security/data/cve/CVE-2011-4317.html
https://www.redhat.com/security/data/cve/CVE-2012-0031.html
https://www.redhat.com/security/data/cve/CVE-2012-0053.html
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHSA-2011-1391.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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