RHSA-2013:0512 - Security Advisory

Topic

Updated httpd packages that fix two security issues, several bugs, and add
various enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having low
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.

Description

The httpd packages contain the Apache HTTP Server (httpd), which is the
namesake project of The Apache Software Foundation.

An input sanitization flaw was found in the mod_negotiation Apache HTTP
Server module. A remote attacker able to upload or create files with
arbitrary names in a directory that has the MultiViews options enabled,
could use this flaw to conduct cross-site scripting attacks against users
visiting the site. (CVE-2008-0455, CVE-2012-2687)

It was discovered that mod_proxy_ajp, when used in configurations with
mod_proxy in load balancer mode, would mark a back-end server as failed
when request processing timed out, even when a previous AJP (Apache JServ
Protocol) CPing request was responded to by the back-end. A remote
attacker able to make a back-end use an excessive amount of time to
process a request could cause mod_proxy to not send requests to back-end
AJP servers for the retry timeout period or until all back-end servers
were marked as failed. (CVE-2012-4557)

These updated httpd packages include numerous bug fixes and enhancements.
Space precludes documenting all of these changes in this advisory. Users
are directed to the Red Hat Enterprise Linux 6.4 Technical Notes, linked
to in the References, for information on the most significant of these
changes.

All users of httpd are advised to upgrade to these updated packages, which
contain backported patches to correct these issues and add these
enhancements. After installing the updated packages, the httpd daemon will
be restarted automatically.

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/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 757735 - [RFE] httpd's rotatelogs needs a way to rotate files into a custom location
• BZ - 757739 - [RFE] rotatelogs needs to create files even if they are empty
• BZ - 805720 - Only a single interface is available for SSL
• BZ - 805810 - init script for htcacheclean is missing
• BZ - 828896 - mod_authnz_ldap unable to set environment variables for authorize only
• BZ - 829689 - mod_ldap: fix occasional 500 Internal Server Error
• BZ - 842376 - httpd fails in processing chunked requests with > 31 bytes chunk-size / -extension line
• BZ - 848954 - Putting private key first in SSLProxyMachineCertificateFile causes segfault
• BZ - 850794 - CVE-2012-2687 CVE-2008-0455 httpd: mod_negotiation XSS via untrusted file names in directories with MultiViews enabled
• BZ - 867745 - mod_ssl post install script can cause failures
• BZ - 868283 - mod_cache regression in httpd 2.2.3-65: non-cacheable 304 responses serve bad data
• BZ - 871685 - CVE-2012-4557 httpd: mod_proxy_ajp worker moved to error state when timeout exceeded
• BZ - 876923 - "if" condition always true - detected by Coverity

CVEs

• CVE-2012-4557
• CVE-2008-0455
• CVE-2012-2687

References

• https://access.redhat.com/security/updates/classification/#low
• https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.4_Technical_Notes/httpd.html