CVE-2016-0736 Red Hat Update for httpd Security (RHSA-2017:0906)

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

It was discovered that the mod_session_crypto module of httpd did not use any mechanisms to verify integrity of the encrypted session data stored in the user's browser. A remote attacker could use this flaw to decrypt and modify session data using a padding oracle attack. (CVE-2016-0736)
It was discovered that the mod_auth_digest module of httpd did not properly check for memory allocation failures. A remote attacker could use this flaw to cause httpd child processes to repeatedly crash if the server used HTTP digest authentication. (CVE-2016-2161)
It was discovered that the HTTP parser in httpd incorrectly allowed certain characters not permitted by the HTTP protocol specification to appear unencoded in HTTP request headers. If httpd was used in conjunction with a proxy or backend server that interpreted those characters differently, a remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning. (CVE-2016-8743)

A remote attacker could use this flaw to decrypt and modify session data using a padding oracle attack. (CVE-2016-0736).
A remote attacker could use this flaw to cause httpd child processes to repeatedly crash if the server used HTTP digest authentication. (CVE-2016-2161)
A remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning. (CVE-2016-8743)

Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

Refer to Red Hat security advisory RHSA-2017:0906 to address this issue and obtain more information.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

RHSA-2017:0906: Red Hat Enterprise Linux