Issued:
2010-03-25
Updated:
2010-03-25

RHSA-2010:0168 - Moderate: httpd security and enhancement update

Synopsis

Moderate: httpd security and enhancement update

Type/Severity

Security Advisory Moderate

Topic

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.

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: http://kbase.redhat.com/faq/docs/DOC-20491

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.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.4ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.4s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • httpd-2.2.3-31.el5_4.4.src.rpm
  • mod_ssl-2.2.3-31.el5_4.4.i386.rpm
  • mod_ssl-2.2.3-31.el5_4.4.ppc.rpm
  • httpd-2.2.3-31.el5_4.4.x86_64.rpm
  • httpd-2.2.3-31.el5_4.4.ppc.rpm
  • httpd-manual-2.2.3-31.el5_4.4.s390x.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
  • httpd-2.2.3-31.el5_4.4.ia64.rpm
  • httpd-devel-2.2.3-31.el5_4.4.s390.rpm
  • mod_ssl-2.2.3-31.el5_4.4.s390x.rpm
  • httpd-manual-2.2.3-31.el5_4.4.ia64.rpm
  • httpd-manual-2.2.3-31.el5_4.4.ppc.rpm
  • httpd-devel-2.2.3-31.el5_4.4.ia64.rpm
  • httpd-2.2.3-31.el5_4.4.s390x.rpm
  • httpd-devel-2.2.3-31.el5_4.4.ppc.rpm
  • httpd-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.i386.rpm
  • httpd-devel-2.2.3-31.el5_4.4.i386.rpm
  • mod_ssl-2.2.3-31.el5_4.4.ia64.rpm
  • httpd-devel-2.2.3-31.el5_4.4.ppc64.rpm
  • httpd-devel-2.2.3-31.el5_4.4.s390x.rpm

Fixes

CVEs

References

Additional information