Red Hat: 2011:1391-01: httpd: Moderate Advisory
Summary
The Apache HTTP Server is a popular web server.
It was discovered that the Apache HTTP Server did not properly validate the
request URI for proxied requests. In certain configurations, if a reverse
proxy used the ProxyPassMatch directive, or if it used the RewriteRule
directive with the proxy flag, a remote attacker could make the proxy
connect to an arbitrary server, possibly disclosing sensitive information
from internal web servers not directly accessible to the attacker.
(CVE-2011-3368)
It was discovered that mod_proxy_ajp incorrectly returned an "Internal
Server Error" response when processing certain malformed HTTP requests,
which caused the back-end server to be marked as failed in configurations
where mod_proxy was 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 or until all back-end
servers were marked as failed. (CVE-2011-3348)
Red Hat would like to thank Context Information Security for reporting the
CVE-2011-3368 issue.
This update also fixes the following bug:
* The fix for CVE-2011-3192 provided by the RHSA-2011:1245 update
introduced regressions in the way httpd handled certain Range HTTP header
values. This update corrects those regressions. (BZ#736592)
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 must be restarted for the update to take effect.
Summary
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
References
https://www.redhat.com/security/data/cve/CVE-2011-3348.html https://www.redhat.com/security/data/cve/CVE-2011-3368.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/errata/RHSA-2011:1245.html
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386:
httpd-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-tools-2.2.15-9.el6_1.3.i686.rpm
x86_64:
httpd-2.2.15-9.el6_1.3.x86_64.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-tools-2.2.15-9.el6_1.3.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386:
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
mod_ssl-2.2.15-9.el6_1.3.i686.rpm
noarch:
httpd-manual-2.2.15-9.el6_1.3.noarch.rpm
x86_64:
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.x86_64.rpm
mod_ssl-2.2.15-9.el6_1.3.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64:
httpd-2.2.15-9.el6_1.3.x86_64.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-tools-2.2.15-9.el6_1.3.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
noarch:
httpd-manual-2.2.15-9.el6_1.3.noarch.rpm
x86_64:
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.x86_64.rpm
mod_ssl-2.2.15-9.el6_1.3.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386:
httpd-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-tools-2.2.15-9.el6_1.3.i686.rpm
mod_ssl-2.2.15-9.el6_1.3.i686.rpm
noarch:
httpd-manual-2.2.15-9.el6_1.3.noarch.rpm
ppc64:
httpd-2.2.15-9.el6_1.3.ppc64.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.ppc.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.ppc64.rpm
httpd-devel-2.2.15-9.el6_1.3.ppc.rpm
httpd-devel-2.2.15-9.el6_1.3.ppc64.rpm
httpd-tools-2.2.15-9.el6_1.3.ppc64.rpm
mod_ssl-2.2.15-9.el6_1.3.ppc64.rpm
s390x:
httpd-2.2.15-9.el6_1.3.s390x.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.s390.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.s390x.rpm
httpd-devel-2.2.15-9.el6_1.3.s390.rpm
httpd-devel-2.2.15-9.el6_1.3.s390x.rpm
httpd-tools-2.2.15-9.el6_1.3.s390x.rpm
mod_ssl-2.2.15-9.el6_1.3.s390x.rpm
x86_64:
httpd-2.2.15-9.el6_1.3.x86_64.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.x86_64.rpm
httpd-tools-2.2.15-9.el6_1.3.x86_64.rpm
mod_ssl-2.2.15-9.el6_1.3.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
i386:
httpd-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-tools-2.2.15-9.el6_1.3.i686.rpm
mod_ssl-2.2.15-9.el6_1.3.i686.rpm
noarch:
httpd-manual-2.2.15-9.el6_1.3.noarch.rpm
x86_64:
httpd-2.2.15-9.el6_1.3.x86_64.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.i686.rpm
httpd-debuginfo-2.2.15-9.el6_1.3.x86_64.rpm
httpd-devel-2.2.15-9.el6_1.3.i686.rpm
httpd-devel-2.2.15-9.el6_1.3.x86_64.rpm
httpd-tools-2.2.15-9.el6_1.3.x86_64.rpm
mod_ssl-2.2.15-9.el6_1.3.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
Topic
Updated httpd packages that fix two security issues and one bug are nowavailable for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.
Topic
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
Bugs Fixed
736592 - httpd: RHSA-2011:1245 regressions [rhel-6]
736690 - CVE-2011-3348 httpd: mod_proxy_ajp remote temporary DoS
740045 - CVE-2011-3368 httpd: reverse web proxy vulnerability