Issued:
2016-07-18
Updated:
2016-07-18

RHSA-2016:1420 - Important: httpd24-httpd security update

Synopsis

Important: httpd24-httpd security update

Type/Severity

Security Advisory Important

Topic

An update for httpd24-httpd is now available for Red Hat Software Collections.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

  • It was discovered that httpd used the value of the Proxy header from HTTP requests to initialize the HTTP_PROXY environment variable for CGI scripts, which in turn was incorrectly used by certain HTTP client implementations to configure the proxy for outgoing HTTP requests. A remote attacker could possibly use this flaw to redirect HTTP requests performed by a CGI script to an attacker-controlled proxy via a malicious HTTP request. (CVE-2016-5387)

Note: After this update, httpd will no longer pass the value of the Proxy request header to scripts via the HTTP_PROXY environment variable.

  • A flaw was found in the way httpd performed client authentication using X.509 client certificates. When the HTTP/2 protocol was enabled, a remote attacker could use this flaw to access resources protected by certificate authentication without providing a valid client certificate. (CVE-2016-4979)

Red Hat would like to thank Scott Geary (VendHQ) for reporting CVE-2016-5387 and Apache Software Foundation for reporting CVE-2016-4979. Upstream acknowledges Erki Aring (Liewenthal Electronics Ltd) as the original reporter of CVE-2016-4979.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, the httpd daemon will be restarted automatically.

Affected Products

ProductVersionArch
Red Hat Software Collections (for RHEL Workstation)1x86_64
Red Hat Software Collections (for RHEL Workstation)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64
Red Hat Software Collections (for RHEL Server)1x86_64

Updated Packages

  • httpd24-mod_proxy_html-2.4.18-11.el7.x86_64.rpm
  • httpd24-httpd-debuginfo-2.4.18-11.el6.x86_64.rpm
  • httpd24-httpd-2.4.18-11.el7.x86_64.rpm
  • httpd24-mod_ssl-2.4.18-11.el7.x86_64.rpm
  • httpd24-httpd-tools-2.4.18-11.el6.x86_64.rpm
  • httpd24-mod_ssl-2.4.18-11.el6.x86_64.rpm
  • httpd24-httpd-tools-2.4.18-11.el7.x86_64.rpm
  • httpd24-httpd-2.4.18-11.el6.x86_64.rpm
  • httpd24-mod_session-2.4.18-11.el6.x86_64.rpm
  • httpd24-mod_proxy_html-2.4.18-11.el6.x86_64.rpm
  • httpd24-mod_ldap-2.4.18-11.el7.x86_64.rpm
  • httpd24-mod_session-2.4.18-11.el7.x86_64.rpm
  • httpd24-httpd-manual-2.4.18-11.el7.noarch.rpm
  • httpd24-httpd-manual-2.4.18-11.el6.noarch.rpm
  • httpd24-httpd-2.4.18-11.el6.src.rpm
  • httpd24-httpd-devel-2.4.18-11.el7.x86_64.rpm
  • httpd24-mod_ldap-2.4.18-11.el6.x86_64.rpm
  • httpd24-httpd-debuginfo-2.4.18-11.el7.x86_64.rpm
  • httpd24-httpd-devel-2.4.18-11.el6.x86_64.rpm
  • httpd24-httpd-2.4.18-11.el7.src.rpm

Fixes

CVEs

References

Additional information