Issued:

2009-07-09

Updated:

2009-07-09

RHSA-2009:1148 - Important: httpd security update

Synopsis

Important: httpd security update

Type/Severity

Security Advisory Important

Topic

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

This update has been rated as having important security impact by the Red Hat Security Response Team.

Description

The Apache HTTP Server is a popular Web server.

A denial of service flaw was found in the Apache mod_proxy module when it was used as a reverse proxy. A remote attacker could use this flaw to force a proxy process to consume large amounts of CPU time. (CVE-2009-1890)

A denial of service flaw was found in the Apache mod_deflate module. This module continued to compress large files until compression was complete, even if the network connection that requested the content was closed before compression completed. This would cause mod_deflate to consume large amounts of CPU if mod_deflate was enabled for a large file. (CVE-2009-1891)

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.

Solution

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

This update is available via 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

Updated Packages

• httpd-devel-2.2.3-22.el5_3.2.s390.rpm
• httpd-2.2.3-22.el5_3.2.s390x.rpm
• httpd-devel-2.2.3-22.el5_3.2.s390x.rpm
• mod_ssl-2.2.3-22.el5_3.2.x86_64.rpm
• httpd-devel-2.2.3-22.el5_3.2.ppc.rpm
• mod_ssl-2.2.3-22.el5_3.2.s390x.rpm
• httpd-manual-2.2.3-22.el5_3.2.ppc.rpm
• httpd-devel-2.2.3-22.el5_3.2.i386.rpm
• httpd-manual-2.2.3-22.el5_3.2.i386.rpm
• httpd-devel-2.2.3-22.el5_3.2.x86_64.rpm
• httpd-devel-2.2.3-22.el5_3.2.ppc64.rpm
• httpd-2.2.3-22.el5_3.2.i386.rpm
• httpd-2.2.3-22.el5_3.2.src.rpm
• httpd-devel-2.2.3-22.el5_3.2.ia64.rpm
• httpd-manual-2.2.3-22.el5_3.2.ia64.rpm
• httpd-manual-2.2.3-22.el5_3.2.s390x.rpm
• mod_ssl-2.2.3-22.el5_3.2.ppc.rpm
• httpd-2.2.3-22.el5_3.2.ia64.rpm
• mod_ssl-2.2.3-22.el5_3.2.i386.rpm
• mod_ssl-2.2.3-22.el5_3.2.ia64.rpm
• httpd-manual-2.2.3-22.el5_3.2.x86_64.rpm
• httpd-2.2.3-22.el5_3.2.ppc.rpm
• httpd-2.2.3-22.el5_3.2.x86_64.rpm

Fixes

• This content is not included.BZ - 509125
• This content is not included.BZ - 509375

CVEs

• CVE-2009-1890
• CVE-2009-1891

References

• http://www.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.